./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:12:19,146 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:12:19,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:12:19,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:12:19,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:12:19,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:12:19,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:12:19,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:12:19,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:12:19,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:12:19,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:12:19,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:12:19,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:12:19,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:12:19,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:12:19,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:12:19,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:12:19,184 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:12:19,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:12:19,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:12:19,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:12:19,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:12:19,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:12:19,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:12:19,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:12:19,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:12:19,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:12:19,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:12:19,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:12:19,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:12:19,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:12:19,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:12:19,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:12:19,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:12:19,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:12:19,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:12:19,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:12:19,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:12:19,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:12:19,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:12:19,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:12:19,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:12:19,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:12:19,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:12:19,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:12:19,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:12:19,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:12:19,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:12:19,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:12:19,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:12:19,235 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:12:19,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:12:19,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:12:19,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:12:19,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:12:19,236 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:12:19,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:12:19,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:12:19,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:12:19,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:12:19,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:12:19,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:12:19,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:12:19,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:12:19,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:12:19,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:12:19,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:12:19,239 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:12:19,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:12:19,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:12:19,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:12:19,239 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2021-12-06 19:12:19,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:12:19,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:12:19,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:12:19,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:12:19,454 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:12:19,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-06 19:12:19,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/c33fb9692/e03f12b5143c428080d5bf35a15b1474/FLAGf0dca47b3 [2021-12-06 19:12:19,918 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:12:19,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-06 19:12:19,929 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/c33fb9692/e03f12b5143c428080d5bf35a15b1474/FLAGf0dca47b3 [2021-12-06 19:12:19,941 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/c33fb9692/e03f12b5143c428080d5bf35a15b1474 [2021-12-06 19:12:19,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:12:19,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:12:19,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:12:19,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:12:19,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:12:19,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:12:19" (1/1) ... [2021-12-06 19:12:19,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f86078a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:19, skipping insertion in model container [2021-12-06 19:12:19,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:12:19" (1/1) ... [2021-12-06 19:12:19,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:12:19,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:12:20,173 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-06 19:12:20,193 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:12:20,199 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:12:20,222 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-06 19:12:20,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:12:20,256 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:12:20,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20 WrapperNode [2021-12-06 19:12:20,256 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:12:20,257 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:12:20,257 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:12:20,257 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:12:20,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,295 INFO L137 Inliner]: procedures = 125, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 285 [2021-12-06 19:12:20,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:12:20,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:12:20,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:12:20,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:12:20,302 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:12:20,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:12:20,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:12:20,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:12:20,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (1/1) ... [2021-12-06 19:12:20,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:12:20,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:20,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:12:20,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:12:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:12:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-12-06 19:12:20,379 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-06 19:12:20,380 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:12:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:12:20,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:12:20,456 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:12:20,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:12:20,730 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:12:20,738 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:12:20,738 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-06 19:12:20,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:12:20 BoogieIcfgContainer [2021-12-06 19:12:20,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:12:20,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:12:20,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:12:20,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:12:20,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:12:19" (1/3) ... [2021-12-06 19:12:20,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f14a40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:12:20, skipping insertion in model container [2021-12-06 19:12:20,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:12:20" (2/3) ... [2021-12-06 19:12:20,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f14a40f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:12:20, skipping insertion in model container [2021-12-06 19:12:20,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:12:20" (3/3) ... [2021-12-06 19:12:20,746 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2021-12-06 19:12:20,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:12:20,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:12:20,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:12:20,795 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:12:20,795 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:12:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:12:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:12:20,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:20,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:20,815 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2117458630, now seen corresponding path program 1 times [2021-12-06 19:12:20,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169663526] [2021-12-06 19:12:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:20,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:20,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169663526] [2021-12-06 19:12:20,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169663526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:20,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:20,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:12:20,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949280988] [2021-12-06 19:12:20,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:20,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:12:20,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:12:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:12:20,990 INFO L87 Difference]: Start difference. First operand has 96 states, 77 states have (on average 1.8051948051948052) internal successors, (139), 93 states have internal predecessors, (139), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,014 INFO L93 Difference]: Finished difference Result 188 states and 335 transitions. [2021-12-06 19:12:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:12:21,015 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:12:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,022 INFO L225 Difference]: With dead ends: 188 [2021-12-06 19:12:21,022 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 19:12:21,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:12:21,027 INFO L933 BasicCegarLoop]: 119 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, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:12:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 19:12:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-06 19:12:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 84 states have internal predecessors, (93), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2021-12-06 19:12:21,058 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 7 [2021-12-06 19:12:21,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,058 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2021-12-06 19:12:21,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2021-12-06 19:12:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 19:12:21,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,059 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:12:21,060 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash 592840654, now seen corresponding path program 1 times [2021-12-06 19:12:21,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767984311] [2021-12-06 19:12:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:21,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767984311] [2021-12-06 19:12:21,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767984311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:12:21,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143058352] [2021-12-06 19:12:21,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:12:21,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:12:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:12:21,101 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,124 INFO L93 Difference]: Finished difference Result 172 states and 218 transitions. [2021-12-06 19:12:21,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:12:21,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 19:12:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,126 INFO L225 Difference]: With dead ends: 172 [2021-12-06 19:12:21,126 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 19:12:21,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:12:21,127 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:12:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 19:12:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-12-06 19:12:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 86 states have internal predecessors, (95), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2021-12-06 19:12:21,137 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 8 [2021-12-06 19:12:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,137 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2021-12-06 19:12:21,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2021-12-06 19:12:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 19:12:21,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:12:21,138 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1362713673, now seen corresponding path program 1 times [2021-12-06 19:12:21,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696080250] [2021-12-06 19:12:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:21,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696080250] [2021-12-06 19:12:21,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696080250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:12:21,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508651560] [2021-12-06 19:12:21,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:12:21,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:12:21,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:12:21,205 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,298 INFO L93 Difference]: Finished difference Result 235 states and 308 transitions. [2021-12-06 19:12:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 19:12:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,301 INFO L225 Difference]: With dead ends: 235 [2021-12-06 19:12:21,301 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 19:12:21,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:12:21,303 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 516 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 276 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 19:12:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 92. [2021-12-06 19:12:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 89 states have internal predecessors, (99), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2021-12-06 19:12:21,318 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 14 [2021-12-06 19:12:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,318 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2021-12-06 19:12:21,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,318 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2021-12-06 19:12:21,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 19:12:21,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,319 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:12:21,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1343418310, now seen corresponding path program 1 times [2021-12-06 19:12:21,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887179763] [2021-12-06 19:12:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:21,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887179763] [2021-12-06 19:12:21,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887179763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:12:21,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538118288] [2021-12-06 19:12:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:12:21,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:12:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:12:21,392 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,494 INFO L93 Difference]: Finished difference Result 94 states and 116 transitions. [2021-12-06 19:12:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:12:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 19:12:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,495 INFO L225 Difference]: With dead ends: 94 [2021-12-06 19:12:21,495 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 19:12:21,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:21,497 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 11 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 319 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 19:12:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-06 19:12:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 88 states have internal predecessors, (98), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions. [2021-12-06 19:12:21,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 21 [2021-12-06 19:12:21,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,505 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 113 transitions. [2021-12-06 19:12:21,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions. [2021-12-06 19:12:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 19:12:21,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:12:21,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1668834300, now seen corresponding path program 1 times [2021-12-06 19:12:21,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059065509] [2021-12-06 19:12:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:21,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059065509] [2021-12-06 19:12:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059065509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:12:21,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356664098] [2021-12-06 19:12:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:12:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:12:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:12:21,578 INFO L87 Difference]: Start difference. First operand 91 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,693 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2021-12-06 19:12:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:12:21,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 19:12:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,694 INFO L225 Difference]: With dead ends: 118 [2021-12-06 19:12:21,695 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 19:12:21,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:21,696 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 38 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 284 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:21,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 19:12:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2021-12-06 19:12:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 87 states have internal predecessors, (97), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2021-12-06 19:12:21,709 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 21 [2021-12-06 19:12:21,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,709 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2021-12-06 19:12:21,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,710 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2021-12-06 19:12:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 19:12:21,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,710 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:12:21,711 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1088949266, now seen corresponding path program 1 times [2021-12-06 19:12:21,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269949807] [2021-12-06 19:12:21,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:21,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269949807] [2021-12-06 19:12:21,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269949807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:12:21,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198415557] [2021-12-06 19:12:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:12:21,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:12:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:21,784 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:21,928 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2021-12-06 19:12:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 19:12:21,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:21,929 INFO L225 Difference]: With dead ends: 195 [2021-12-06 19:12:21,929 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 19:12:21,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:12:21,930 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 348 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:21,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 283 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:21,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 19:12:21,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 96. [2021-12-06 19:12:21,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 93 states have internal predecessors, (103), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:21,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2021-12-06 19:12:21,939 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 24 [2021-12-06 19:12:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:21,939 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2021-12-06 19:12:21,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:21,940 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2021-12-06 19:12:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 19:12:21,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:21,940 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:21,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:12:21,940 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1875885747, now seen corresponding path program 1 times [2021-12-06 19:12:21,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:21,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379363704] [2021-12-06 19:12:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:21,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:21,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379363704] [2021-12-06 19:12:21,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379363704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:21,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:12:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852051473] [2021-12-06 19:12:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:12:21,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:12:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:21,992 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:22,138 INFO L93 Difference]: Finished difference Result 194 states and 238 transitions. [2021-12-06 19:12:22,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:22,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 19:12:22,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:22,139 INFO L225 Difference]: With dead ends: 194 [2021-12-06 19:12:22,139 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 19:12:22,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:12:22,140 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 345 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:22,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 283 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 19:12:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 102. [2021-12-06 19:12:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 99 states have internal predecessors, (109), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2021-12-06 19:12:22,149 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 24 [2021-12-06 19:12:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:22,149 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2021-12-06 19:12:22,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2021-12-06 19:12:22,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:12:22,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:22,150 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:12:22,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash 833312563, now seen corresponding path program 1 times [2021-12-06 19:12:22,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932411080] [2021-12-06 19:12:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:22,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:22,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932411080] [2021-12-06 19:12:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932411080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:22,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:22,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:22,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439897683] [2021-12-06 19:12:22,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:22,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:22,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:22,240 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:22,547 INFO L93 Difference]: Finished difference Result 264 states and 335 transitions. [2021-12-06 19:12:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:12:22,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 19:12:22,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:22,550 INFO L225 Difference]: With dead ends: 264 [2021-12-06 19:12:22,550 INFO L226 Difference]: Without dead ends: 261 [2021-12-06 19:12:22,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:12:22,552 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 527 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:22,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 331 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:12:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-06 19:12:22,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 105. [2021-12-06 19:12:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 102 states have internal predecessors, (112), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-12-06 19:12:22,561 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 27 [2021-12-06 19:12:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:22,562 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-12-06 19:12:22,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-12-06 19:12:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:12:22,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:22,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:12:22,563 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1708085367, now seen corresponding path program 1 times [2021-12-06 19:12:22,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436655331] [2021-12-06 19:12:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:22,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:22,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:22,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436655331] [2021-12-06 19:12:22,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436655331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:22,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:22,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:22,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949961459] [2021-12-06 19:12:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:22,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:22,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:22,634 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:22,932 INFO L93 Difference]: Finished difference Result 263 states and 333 transitions. [2021-12-06 19:12:22,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:12:22,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 19:12:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:22,934 INFO L225 Difference]: With dead ends: 263 [2021-12-06 19:12:22,934 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 19:12:22,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:12:22,936 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 523 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:22,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 331 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:12:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 19:12:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 108. [2021-12-06 19:12:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 105 states have internal predecessors, (115), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2021-12-06 19:12:22,949 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 27 [2021-12-06 19:12:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:22,949 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2021-12-06 19:12:22,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2021-12-06 19:12:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 19:12:22,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:22,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:22,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:12:22,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:22,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash -399551200, now seen corresponding path program 1 times [2021-12-06 19:12:22,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873472315] [2021-12-06 19:12:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:22,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:23,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:23,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873472315] [2021-12-06 19:12:23,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873472315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895822222] [2021-12-06 19:12:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:23,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:23,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:23,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:23,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:12:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:12:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:23,202 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 31 treesize of output 19 [2021-12-06 19:12:23,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 19:12:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:23,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:23,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895822222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:12:23,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:12:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-12-06 19:12:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252877396] [2021-12-06 19:12:23,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:23,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:12:23,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:12:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:23,317 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:23,444 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2021-12-06 19:12:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:12:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 19:12:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:23,445 INFO L225 Difference]: With dead ends: 110 [2021-12-06 19:12:23,445 INFO L226 Difference]: Without dead ends: 106 [2021-12-06 19:12:23,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:12:23,446 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 84 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:23,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 280 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-06 19:12:23,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-12-06 19:12:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 94 states have (on average 1.202127659574468) internal successors, (113), 103 states have internal predecessors, (113), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-12-06 19:12:23,457 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 32 [2021-12-06 19:12:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:23,457 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-12-06 19:12:23,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-12-06 19:12:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 19:12:23,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:23,459 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:23,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:12:23,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:12:23,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2096511860, now seen corresponding path program 1 times [2021-12-06 19:12:23,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:23,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779634879] [2021-12-06 19:12:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:23,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:23,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:23,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779634879] [2021-12-06 19:12:23,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779634879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:23,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:12:23,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004526671] [2021-12-06 19:12:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:12:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:12:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:23,708 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:23,765 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2021-12-06 19:12:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:23,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 19:12:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:23,767 INFO L225 Difference]: With dead ends: 146 [2021-12-06 19:12:23,767 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 19:12:23,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:12:23,768 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 271 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:23,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 325 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:12:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 19:12:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-12-06 19:12:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 98 states have (on average 1.2040816326530612) internal successors, (118), 107 states have internal predecessors, (118), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2021-12-06 19:12:23,782 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 33 [2021-12-06 19:12:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:23,782 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2021-12-06 19:12:23,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2021-12-06 19:12:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:12:23,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:23,783 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:23,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:12:23,784 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:23,784 INFO L85 PathProgramCache]: Analyzing trace with hash -236025208, now seen corresponding path program 1 times [2021-12-06 19:12:23,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:23,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062540649] [2021-12-06 19:12:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:23,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:23,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062540649] [2021-12-06 19:12:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062540649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853949839] [2021-12-06 19:12:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:23,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:23,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:23,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:12:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 19:12:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:24,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:12:24,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:12:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:24,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:12:24,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853949839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:24,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:12:24,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 12 [2021-12-06 19:12:24,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428213329] [2021-12-06 19:12:24,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:24,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:12:24,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:24,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:12:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:12:24,160 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:24,404 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2021-12-06 19:12:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:12:24,404 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 19:12:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:24,405 INFO L225 Difference]: With dead ends: 199 [2021-12-06 19:12:24,405 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 19:12:24,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:12:24,406 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 344 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:24,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 521 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:12:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 19:12:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-12-06 19:12:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 116 states have internal predecessors, (128), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-12-06 19:12:24,415 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 36 [2021-12-06 19:12:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:24,416 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-12-06 19:12:24,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-12-06 19:12:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:12:24,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:24,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:24,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:12:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:12:24,617 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash -73182163, now seen corresponding path program 1 times [2021-12-06 19:12:24,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:24,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539296206] [2021-12-06 19:12:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:24,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:12:24,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539296206] [2021-12-06 19:12:24,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539296206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286472068] [2021-12-06 19:12:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:24,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:24,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:24,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:12:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:12:24,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:24,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:24,876 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 [2021-12-06 19:12:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:12:24,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:12:24,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286472068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:12:24,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:12:24,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2021-12-06 19:12:24,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593808376] [2021-12-06 19:12:24,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:24,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:12:24,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:12:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:12:24,978 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:25,218 INFO L93 Difference]: Finished difference Result 299 states and 366 transitions. [2021-12-06 19:12:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:12:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 19:12:25,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:25,220 INFO L225 Difference]: With dead ends: 299 [2021-12-06 19:12:25,220 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 19:12:25,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:12:25,221 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 234 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:25,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 546 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:12:25,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 19:12:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 130. [2021-12-06 19:12:25,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.1864406779661016) internal successors, (140), 127 states have internal predecessors, (140), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2021-12-06 19:12:25,231 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 38 [2021-12-06 19:12:25,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:25,231 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2021-12-06 19:12:25,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2021-12-06 19:12:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:12:25,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:25,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:25,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:12:25,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:12:25,432 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash 490774160, now seen corresponding path program 1 times [2021-12-06 19:12:25,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:25,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944411826] [2021-12-06 19:12:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:25,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:25,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:25,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944411826] [2021-12-06 19:12:25,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944411826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:25,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:25,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:12:25,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652555048] [2021-12-06 19:12:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:25,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:12:25,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:25,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:12:25,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:25,471 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:25,544 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2021-12-06 19:12:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:12:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-06 19:12:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:25,546 INFO L225 Difference]: With dead ends: 238 [2021-12-06 19:12:25,547 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 19:12:25,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:12:25,548 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 347 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:25,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 380 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:12:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 19:12:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2021-12-06 19:12:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 119 states have (on average 1.184873949579832) internal successors, (141), 128 states have internal predecessors, (141), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2021-12-06 19:12:25,559 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 38 [2021-12-06 19:12:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:25,559 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2021-12-06 19:12:25,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2021-12-06 19:12:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:12:25,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:25,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:25,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:12:25,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:25,561 INFO L85 PathProgramCache]: Analyzing trace with hash -557560351, now seen corresponding path program 1 times [2021-12-06 19:12:25,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265503279] [2021-12-06 19:12:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:25,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:25,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:25,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265503279] [2021-12-06 19:12:25,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265503279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:25,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:25,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:12:25,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746751235] [2021-12-06 19:12:25,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:25,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:12:25,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:25,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:12:25,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:12:25,611 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:25,779 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2021-12-06 19:12:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:12:25,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 19:12:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:25,780 INFO L225 Difference]: With dead ends: 165 [2021-12-06 19:12:25,780 INFO L226 Difference]: Without dead ends: 162 [2021-12-06 19:12:25,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:12:25,782 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 239 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:25,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 331 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-06 19:12:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 137. [2021-12-06 19:12:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 1.184) internal successors, (148), 134 states have internal predecessors, (148), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:12:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 160 transitions. [2021-12-06 19:12:25,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 160 transitions. Word has length 39 [2021-12-06 19:12:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:25,796 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 160 transitions. [2021-12-06 19:12:25,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 160 transitions. [2021-12-06 19:12:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:12:25,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:25,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:25,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:12:25,797 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1187191262, now seen corresponding path program 1 times [2021-12-06 19:12:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120090360] [2021-12-06 19:12:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:25,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:25,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120090360] [2021-12-06 19:12:25,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120090360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:25,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:25,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:12:25,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035566464] [2021-12-06 19:12:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:25,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:12:25,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:25,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:12:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:12:25,857 INFO L87 Difference]: Start difference. First operand 137 states and 160 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:26,082 INFO L93 Difference]: Finished difference Result 316 states and 415 transitions. [2021-12-06 19:12:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:12:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 19:12:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:26,085 INFO L225 Difference]: With dead ends: 316 [2021-12-06 19:12:26,085 INFO L226 Difference]: Without dead ends: 275 [2021-12-06 19:12:26,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-12-06 19:12:26,086 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 715 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:26,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 744 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-06 19:12:26,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 156. [2021-12-06 19:12:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 153 states have internal predecessors, (173), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:26,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 189 transitions. [2021-12-06 19:12:26,103 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 189 transitions. Word has length 39 [2021-12-06 19:12:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:26,104 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 189 transitions. [2021-12-06 19:12:26,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 189 transitions. [2021-12-06 19:12:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 19:12:26,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:26,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:26,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:12:26,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1447224354, now seen corresponding path program 1 times [2021-12-06 19:12:26,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:26,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788522621] [2021-12-06 19:12:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:26,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:26,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788522621] [2021-12-06 19:12:26,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788522621] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266392090] [2021-12-06 19:12:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:26,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:26,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:26,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:12:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 19:12:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:26,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:26,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:12:26,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:12:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:26,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266392090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:12:26,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:12:26,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 10 [2021-12-06 19:12:26,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900219263] [2021-12-06 19:12:26,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:26,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:12:26,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:12:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:12:26,511 INFO L87 Difference]: Start difference. First operand 156 states and 189 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:26,592 INFO L93 Difference]: Finished difference Result 249 states and 306 transitions. [2021-12-06 19:12:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:12:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 19:12:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:26,593 INFO L225 Difference]: With dead ends: 249 [2021-12-06 19:12:26,593 INFO L226 Difference]: Without dead ends: 188 [2021-12-06 19:12:26,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:12:26,594 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 40 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:26,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 317 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-06 19:12:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 170. [2021-12-06 19:12:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 167 states have internal predecessors, (187), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2021-12-06 19:12:26,605 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 42 [2021-12-06 19:12:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:26,605 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2021-12-06 19:12:26,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 10 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2021-12-06 19:12:26,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:12:26,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:26,606 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:26,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:12:26,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:26,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash -600772010, now seen corresponding path program 2 times [2021-12-06 19:12:26,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150380512] [2021-12-06 19:12:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:26,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:27,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150380512] [2021-12-06 19:12:27,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150380512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167770720] [2021-12-06 19:12:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:12:27,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:27,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:27,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:12:27,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:12:27,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:12:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:12:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:27,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:12:27,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:27,224 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 19:12:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 19:12:27,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:12:27,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:12:27,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 19:12:27,295 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:12:27,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2021-12-06 19:12:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:27,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:27,430 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 [2021-12-06 19:12:27,533 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 19:12:27,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 15 [2021-12-06 19:12:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:27,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:28,889 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_10| Int) (v_ArrVal_594 Int) (|ULTIMATE.start_main_~item~0#1.offset| Int) (v_ArrVal_588 (Array Int Int))) (or (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_588))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10|) |ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_594) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_10|) 0)))) is different from false [2021-12-06 19:12:28,927 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_587 Int) (|v_ULTIMATE.start_main_~item~0#1.base_10| Int) (v_ArrVal_594 Int) (|v_ULTIMATE.start_main_~node~1#1.base_11| Int) (|ULTIMATE.start_main_~item~0#1.offset| Int) (v_ArrVal_588 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_11|) 0)) (not (= (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_11| v_ArrVal_587) |v_ULTIMATE.start_main_~item~0#1.base_10|) 0)) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_11| v_ArrVal_588))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_10|) |ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_594) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)))) is different from false [2021-12-06 19:12:28,969 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:12:28,970 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2021-12-06 19:12:28,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:28,981 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 335 treesize of output 325 [2021-12-06 19:12:28,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 726 treesize of output 702 [2021-12-06 19:12:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2021-12-06 19:12:29,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 19:12:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 19:12:29,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167770720] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:12:29,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:12:29,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2021-12-06 19:12:29,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387222513] [2021-12-06 19:12:29,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:29,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:12:29,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:29,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:12:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=490, Unknown=2, NotChecked=90, Total=650 [2021-12-06 19:12:29,245 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:30,139 INFO L93 Difference]: Finished difference Result 351 states and 437 transitions. [2021-12-06 19:12:30,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:12:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 19:12:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:30,141 INFO L225 Difference]: With dead ends: 351 [2021-12-06 19:12:30,142 INFO L226 Difference]: Without dead ends: 348 [2021-12-06 19:12:30,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=232, Invalid=962, Unknown=4, NotChecked=134, Total=1332 [2021-12-06 19:12:30,143 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 920 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:30,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1435 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 623 Invalid, 0 Unknown, 824 Unchecked, 0.4s Time] [2021-12-06 19:12:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-06 19:12:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 181. [2021-12-06 19:12:30,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 167 states have (on average 1.1916167664670658) internal successors, (199), 178 states have internal predecessors, (199), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2021-12-06 19:12:30,158 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 44 [2021-12-06 19:12:30,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:30,158 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2021-12-06 19:12:30,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2021-12-06 19:12:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:12:30,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:30,159 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:30,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:12:30,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:12:30,360 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:30,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:30,360 INFO L85 PathProgramCache]: Analyzing trace with hash 186164471, now seen corresponding path program 1 times [2021-12-06 19:12:30,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:30,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671335011] [2021-12-06 19:12:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:30,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:30,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671335011] [2021-12-06 19:12:30,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671335011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:30,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345791942] [2021-12-06 19:12:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:30,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:30,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:30,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:30,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:12:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:30,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:12:30,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:12:30,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:30,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:30,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:12:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:12:30,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 19:12:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:30,721 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:12:30,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 19:12:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:30,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:30,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:12:31,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:31,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 19:12:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:31,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:32,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (+ 4 |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) is different from false [2021-12-06 19:12:32,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) is different from false [2021-12-06 19:12:32,506 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:12:32,507 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2021-12-06 19:12:32,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:32,514 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 319 treesize of output 309 [2021-12-06 19:12:32,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 670 treesize of output 646 [2021-12-06 19:12:32,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 155 [2021-12-06 19:12:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2021-12-06 19:12:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 19:12:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 19:12:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345791942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:12:32,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:12:32,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2021-12-06 19:12:32,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900944379] [2021-12-06 19:12:32,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 19:12:32,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 19:12:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=440, Unknown=2, NotChecked=86, Total=600 [2021-12-06 19:12:32,758 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:32,823 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~data~0#1.offset|) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (not (= |c_ULTIMATE.start_main_~data~0#1.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0)) (= (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|) 1)) is different from false [2021-12-06 19:12:32,832 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (= 0 |c_ULTIMATE.start_main_~data~0#1.offset|) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (not (= |c_ULTIMATE.start_main_~data~0#1.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0))) is different from false [2021-12-06 19:12:34,137 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (= 0 |c_ULTIMATE.start_main_~data~0#1.offset|) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) 0) 0)) (not (= |c_ULTIMATE.start_main_~data~0#1.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0)) (= (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|) 1) (forall ((|ULTIMATE.start_main_~item~0#1.base| Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (+ 4 |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0)))) is different from false [2021-12-06 19:12:34,187 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 4 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse3 (select .cse1 .cse4))) (and (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_695 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_695))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) 0))) (= 0 |c_ULTIMATE.start_main_~data~0#1.offset|) (= |c_ULTIMATE.start_main_~node~1#1.offset| 0) (not (= (select .cse1 0) 0)) (not (= .cse2 0)) (not (= .cse3 .cse2)) (not (= (select (select |c_#memory_$Pointer$.base| .cse3) 0) 0)) (not (= |c_ULTIMATE.start_main_~data~0#1.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| 0)) (= 0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) .cse4))))) is different from false [2021-12-06 19:12:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:34,635 INFO L93 Difference]: Finished difference Result 221 states and 258 transitions. [2021-12-06 19:12:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:12:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 19:12:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:34,636 INFO L225 Difference]: With dead ends: 221 [2021-12-06 19:12:34,636 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 19:12:34,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=197, Invalid=877, Unknown=6, NotChecked=402, Total=1482 [2021-12-06 19:12:34,637 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 524 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:34,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 1193 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 499 Invalid, 0 Unknown, 361 Unchecked, 0.3s Time] [2021-12-06 19:12:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 19:12:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2021-12-06 19:12:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 185 states have internal predecessors, (206), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 222 transitions. [2021-12-06 19:12:34,649 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 222 transitions. Word has length 44 [2021-12-06 19:12:34,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:34,650 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 222 transitions. [2021-12-06 19:12:34,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.24) internal successors, (106), 25 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:34,650 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 222 transitions. [2021-12-06 19:12:34,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 19:12:34,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:34,650 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:34,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:12:34,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:34,851 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:34,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:34,851 INFO L85 PathProgramCache]: Analyzing trace with hash -498608819, now seen corresponding path program 1 times [2021-12-06 19:12:34,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:34,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618819752] [2021-12-06 19:12:34,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:34,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:12:34,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:34,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618819752] [2021-12-06 19:12:34,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618819752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:12:34,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:12:34,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:12:34,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711709466] [2021-12-06 19:12:34,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:12:34,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:12:34,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:12:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:12:34,884 INFO L87 Difference]: Start difference. First operand 188 states and 222 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:34,953 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2021-12-06 19:12:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:12:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-06 19:12:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:34,955 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:12:34,955 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 19:12:34,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:12:34,956 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:34,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 325 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:12:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 19:12:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-06 19:12:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 150 states have internal predecessors, (167), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2021-12-06 19:12:34,966 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 45 [2021-12-06 19:12:34,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:34,966 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2021-12-06 19:12:34,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:34,966 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2021-12-06 19:12:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:12:34,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:34,967 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:12:34,967 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash -636511633, now seen corresponding path program 1 times [2021-12-06 19:12:34,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:34,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400967789] [2021-12-06 19:12:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:34,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:35,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:35,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400967789] [2021-12-06 19:12:35,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400967789] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:35,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796230910] [2021-12-06 19:12:35,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:35,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:35,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:12:35,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:35,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-06 19:12:35,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:12:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:35,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:35,619 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:12:35,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:12:35,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 19:12:35,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:12:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:35,725 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:12:35,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 31 [2021-12-06 19:12:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:35,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:35,740 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-12-06 19:12:35,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-12-06 19:12:36,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:36,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:36,822 INFO L354 Elim1Store]: treesize reduction 93, result has 13.1 percent of original size [2021-12-06 19:12:36,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 129 treesize of output 80 [2021-12-06 19:12:36,833 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-12-06 19:12:36,833 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 8 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-12-06 19:12:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:36,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:39,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_833 Int)) (let ((.cse11 (+ 4 |c_ULTIMATE.start_main_~item~0#1.offset|))) (let ((.cse10 (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_833) .cse11 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse9 (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.offset|) .cse11 |c_ULTIMATE.start_main_~data~0#1.offset|))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| .cse9)) (.cse0 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| .cse10))) (let ((.cse7 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse6 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse1 (select .cse10 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse2 (select .cse9 |c_ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (let ((.cse4 (select .cse7 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse5 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse3 .cse4) .cse5) 0) (= (select (select .cse0 .cse4) .cse5) 0))) (let ((.cse8 (+ 4 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select .cse7 .cse8) 0) (= (select .cse6 .cse8) 0))) (not (= (select (select .cse3 .cse1) .cse2) 0)))))))) is different from false [2021-12-06 19:12:39,709 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| Int) (v_ArrVal_829 (Array Int Int)) (v_ArrVal_833 Int) (v_ArrVal_830 (Array Int Int))) (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_830)) (.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_829))) (let ((.cse9 (store (store (select .cse11 |ULTIMATE.start_main_~item~0#1.base|) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select .cse12 |ULTIMATE.start_main_~item~0#1.base|) 0 v_ArrVal_833) 4 |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse5 (store .cse12 |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse0 (store .cse11 |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse1 (select .cse10 0)) (.cse2 (select .cse9 0)) (.cse6 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse7 (select .cse5 |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse4 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse0 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0))) (not (= 0 (select (select .cse5 .cse1) .cse2))) (let ((.cse8 (+ 4 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select .cse6 .cse8) 0) (= (select .cse7 .cse8) 0))))))))) is different from false [2021-12-06 19:12:41,467 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:12:41,468 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 601 treesize of output 463 [2021-12-06 19:12:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:41,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:41,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 307 [2021-12-06 19:12:41,684 INFO L354 Elim1Store]: treesize reduction 184, result has 47.6 percent of original size [2021-12-06 19:12:41,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 4657 treesize of output 4527 [2021-12-06 19:12:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:42,051 INFO L354 Elim1Store]: treesize reduction 92, result has 72.7 percent of original size [2021-12-06 19:12:42,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 64167 treesize of output 59661 [2021-12-06 19:12:42,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:42,717 INFO L354 Elim1Store]: treesize reduction 16, result has 92.4 percent of original size [2021-12-06 19:12:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 154304 treesize of output 144132 [2021-12-06 19:12:47,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:47,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:47,728 INFO L354 Elim1Store]: treesize reduction 16, result has 92.4 percent of original size [2021-12-06 19:12:47,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 100579 treesize of output 96461 [2021-12-06 19:12:49,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 19:12:49,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:12:49,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-06 19:12:49,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535333684] [2021-12-06 19:12:49,694 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:49,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:12:49,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:49,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:12:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1075, Unknown=2, NotChecked=134, Total=1332 [2021-12-06 19:12:49,695 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:12:51,482 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2021-12-06 19:12:51,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 19:12:51,483 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 19:12:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:12:51,484 INFO L225 Difference]: With dead ends: 221 [2021-12-06 19:12:51,484 INFO L226 Difference]: Without dead ends: 218 [2021-12-06 19:12:51,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=267, Invalid=1631, Unknown=2, NotChecked=170, Total=2070 [2021-12-06 19:12:51,485 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 763 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:12:51,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 508 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:12:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-06 19:12:51,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2021-12-06 19:12:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 153 states have internal predecessors, (170), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:12:51,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 185 transitions. [2021-12-06 19:12:51,497 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 185 transitions. Word has length 47 [2021-12-06 19:12:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:12:51,497 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 185 transitions. [2021-12-06 19:12:51,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:12:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 185 transitions. [2021-12-06 19:12:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 19:12:51,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:12:51,497 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:12:51,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:12:51,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 19:12:51,699 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:12:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:12:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1117057733, now seen corresponding path program 1 times [2021-12-06 19:12:51,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:12:51,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566130254] [2021-12-06 19:12:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:51,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:12:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:52,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:12:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566130254] [2021-12-06 19:12:52,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566130254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:12:52,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909445917] [2021-12-06 19:12:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:12:52,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:12:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:12:52,269 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:12:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:12:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:12:52,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 19:12:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:12:52,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:12:52,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:52,410 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 19:12:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 19:12:52,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:12:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-12-06 19:12:52,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-06 19:12:52,536 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-12-06 19:12:52,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-12-06 19:12:52,616 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 19:12:52,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 54 [2021-12-06 19:12:52,626 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 19:12:52,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2021-12-06 19:12:52,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-12-06 19:12:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,709 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 19:12:52,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 52 [2021-12-06 19:12:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:52,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 69 [2021-12-06 19:12:53,585 INFO L354 Elim1Store]: treesize reduction 133, result has 14.7 percent of original size [2021-12-06 19:12:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 181 treesize of output 114 [2021-12-06 19:12:53,604 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-12-06 19:12:53,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 37 [2021-12-06 19:12:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:12:53,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:12:55,917 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_955 Int)) (let ((.cse8 (+ 4 |c_ULTIMATE.start_main_~item~0#1.offset|))) (let ((.cse6 (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.offset|) .cse8 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse7 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_955) .cse8 |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| .cse7)) (.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| .cse6)) (.cse1 (select .cse7 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse2 (select .cse6 |c_ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) .cse2) 0)) (let ((.cse3 (select (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse4 (select (select .cse5 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse0 .cse3) .cse4) 0) (= (select (select .cse5 .cse3) .cse4) 0))) (not (= (select (select .cse5 .cse1) .cse2) 0))))))) is different from false [2021-12-06 19:12:58,051 INFO L354 Elim1Store]: treesize reduction 139, result has 31.5 percent of original size [2021-12-06 19:12:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 976 treesize of output 669 [2021-12-06 19:12:58,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,125 INFO L354 Elim1Store]: treesize reduction 110, result has 33.3 percent of original size [2021-12-06 19:12:58,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 606 treesize of output 290 [2021-12-06 19:12:58,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,190 INFO L354 Elim1Store]: treesize reduction 88, result has 42.5 percent of original size [2021-12-06 19:12:58,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 1209 treesize of output 1179 [2021-12-06 19:12:58,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:58,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:12:58,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:58,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 2240 treesize of output 2112 [2021-12-06 19:12:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:58,308 INFO L354 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2021-12-06 19:12:58,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2970 treesize of output 2844 [2021-12-06 19:12:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:12:58,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:12:58,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2534 treesize of output 2496 [2021-12-06 19:12:58,482 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 19:12:58,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:12:58,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-06 19:12:58,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086590444] [2021-12-06 19:12:58,482 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:12:58,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 19:12:58,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:12:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 19:12:58,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1049, Unknown=5, NotChecked=66, Total=1260 [2021-12-06 19:12:58,483 INFO L87 Difference]: Start difference. First operand 156 states and 185 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:00,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:00,110 INFO L93 Difference]: Finished difference Result 220 states and 270 transitions. [2021-12-06 19:13:00,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:13:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-06 19:13:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:00,111 INFO L225 Difference]: With dead ends: 220 [2021-12-06 19:13:00,111 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 19:13:00,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=375, Invalid=1694, Unknown=5, NotChecked=88, Total=2162 [2021-12-06 19:13:00,112 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 804 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:00,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 521 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:13:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 19:13:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 159. [2021-12-06 19:13:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 156 states have internal predecessors, (173), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:13:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 188 transitions. [2021-12-06 19:13:00,124 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 188 transitions. Word has length 47 [2021-12-06 19:13:00,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:00,125 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 188 transitions. [2021-12-06 19:13:00,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:00,125 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 188 transitions. [2021-12-06 19:13:00,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 19:13:00,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:00,125 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:00,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:00,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:13:00,327 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 814579079, now seen corresponding path program 2 times [2021-12-06 19:13:00,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:00,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710567275] [2021-12-06 19:13:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:00,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:00,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710567275] [2021-12-06 19:13:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710567275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:13:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80706170] [2021-12-06 19:13:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:13:00,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:13:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:00,502 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:13:00,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:13:00,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:13:00,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:00,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 19:13:00,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:00,626 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 [2021-12-06 19:13:00,628 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 [2021-12-06 19:13:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 19:13:00,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:00,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80706170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:00,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:13:00,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2021-12-06 19:13:00,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358487607] [2021-12-06 19:13:00,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:00,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:00,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:00,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:13:00,639 INFO L87 Difference]: Start difference. First operand 159 states and 188 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:00,738 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2021-12-06 19:13:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:13:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 19:13:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:00,739 INFO L225 Difference]: With dead ends: 161 [2021-12-06 19:13:00,739 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 19:13:00,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-12-06 19:13:00,739 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 13 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:00,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 319 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:13:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 19:13:00,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-12-06 19:13:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 127 states have (on average 1.1968503937007875) internal successors, (152), 136 states have internal predecessors, (152), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:13:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2021-12-06 19:13:00,750 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 48 [2021-12-06 19:13:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2021-12-06 19:13:00,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2021-12-06 19:13:00,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 19:13:00,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:00,751 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:00,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:13:00,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 19:13:00,953 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:00,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash 568067714, now seen corresponding path program 1 times [2021-12-06 19:13:00,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245459226] [2021-12-06 19:13:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:00,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:13:01,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245459226] [2021-12-06 19:13:01,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245459226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:13:01,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390207169] [2021-12-06 19:13:01,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:01,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:13:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:01,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:13:01,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:13:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:01,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:13:01,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:01,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:13:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:13:01,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:13:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390207169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:01,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:13:01,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 20 [2021-12-06 19:13:01,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461165810] [2021-12-06 19:13:01,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:01,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 19:13:01,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 19:13:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:13:01,338 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:01,829 INFO L93 Difference]: Finished difference Result 265 states and 338 transitions. [2021-12-06 19:13:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:13:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-06 19:13:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:01,831 INFO L225 Difference]: With dead ends: 265 [2021-12-06 19:13:01,831 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 19:13:01,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 19:13:01,832 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 804 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:01,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 685 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:13:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 19:13:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 143. [2021-12-06 19:13:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 140 states have internal predecessors, (156), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 19:13:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2021-12-06 19:13:01,844 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 51 [2021-12-06 19:13:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:01,844 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2021-12-06 19:13:01,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 20 states have internal predecessors, (101), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2021-12-06 19:13:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 19:13:01,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:01,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:01,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:13:02,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:13:02,046 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash 950662001, now seen corresponding path program 3 times [2021-12-06 19:13:02,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:13:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020692025] [2021-12-06 19:13:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:02,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:13:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:13:02,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:13:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020692025] [2021-12-06 19:13:02,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020692025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:13:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235693709] [2021-12-06 19:13:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 19:13:02,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:13:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:02,273 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:13:02,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:13:02,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 19:13:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 19:13:02,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:02,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:13:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:02,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:02,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:02,435 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-06 19:13:02,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-06 19:13:02,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:13:02,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:13:02,466 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:13:02,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:13:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:02,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-12-06 19:13:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:02,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-12-06 19:13:02,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:13:02,707 INFO L354 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2021-12-06 19:13:02,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 39 [2021-12-06 19:13:02,712 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:13:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-12-06 19:13:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 19:13:02,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:10,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-12-06 19:13:10,192 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-06 19:13:10,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-06 19:13:10,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:13:10,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-06 19:13:10,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853690570] [2021-12-06 19:13:10,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:10,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 19:13:10,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:13:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 19:13:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:13:10,193 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:13:10,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-12-06 19:13:10,194 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:10,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:13:10,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:13:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:13:10,397 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@63247636 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 19:13:10,405 INFO L158 Benchmark]: Toolchain (without parser) took 50459.54ms. Allocated memory was 123.7MB in the beginning and 356.5MB in the end (delta: 232.8MB). Free memory was 84.6MB in the beginning and 125.9MB in the end (delta: -41.3MB). Peak memory consumption was 190.8MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,405 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:13:10,406 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.20ms. Allocated memory is still 123.7MB. Free memory was 84.3MB in the beginning and 88.3MB in the end (delta: -4.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,407 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.13ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 85.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,407 INFO L158 Benchmark]: Boogie Preprocessor took 30.13ms. Allocated memory is still 123.7MB. Free memory was 85.7MB in the beginning and 83.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,408 INFO L158 Benchmark]: RCFGBuilder took 414.10ms. Allocated memory is still 123.7MB. Free memory was 83.1MB in the beginning and 60.6MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,409 INFO L158 Benchmark]: TraceAbstraction took 49662.04ms. Allocated memory was 123.7MB in the beginning and 356.5MB in the end (delta: 232.8MB). Free memory was 60.1MB in the beginning and 125.9MB in the end (delta: -65.8MB). Peak memory consumption was 170.1MB. Max. memory is 16.1GB. [2021-12-06 19:13:10,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.20ms. Allocated memory is still 123.7MB. Free memory was 84.3MB in the beginning and 88.3MB in the end (delta: -4.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.13ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 85.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.13ms. Allocated memory is still 123.7MB. Free memory was 85.7MB in the beginning and 83.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 414.10ms. Allocated memory is still 123.7MB. Free memory was 83.1MB in the beginning and 60.6MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 49662.04ms. Allocated memory was 123.7MB in the beginning and 356.5MB in the end (delta: 232.8MB). Free memory was 60.1MB in the beginning and 125.9MB in the end (delta: -65.8MB). Peak memory consumption was 170.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@63247636 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@63247636: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:13:11,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:13:11,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:13:11,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:13:11,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:13:11,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:13:11,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:13:11,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:13:11,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:13:11,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:13:11,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:13:11,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:13:11,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:13:11,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:13:11,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:13:11,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:13:11,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:13:11,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:13:11,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:13:11,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:13:11,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:13:11,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:13:11,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:13:11,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:13:11,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:13:11,744 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:13:11,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:13:11,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:13:11,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:13:11,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:13:11,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:13:11,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:13:11,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:13:11,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:13:11,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:13:11,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:13:11,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:13:11,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:13:11,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:13:11,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:13:11,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:13:11,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-06 19:13:11,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:13:11,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:13:11,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:13:11,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:13:11,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:13:11,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:13:11,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:13:11,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:13:11,784 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:13:11,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:13:11,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:13:11,785 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:13:11,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:13:11,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:11,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:13:11,787 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:13:11,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:13:11,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:13:11,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:13:11,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:13:11,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:13:11,788 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2021-12-06 19:13:12,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:13:12,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:13:12,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:13:12,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:13:12,033 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:13:12,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-06 19:13:12,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/90993d381/292bda78359e452eacbba31d299d2e51/FLAG9b21a36b9 [2021-12-06 19:13:12,500 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:13:12,500 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2021-12-06 19:13:12,510 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/90993d381/292bda78359e452eacbba31d299d2e51/FLAG9b21a36b9 [2021-12-06 19:13:12,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/data/90993d381/292bda78359e452eacbba31d299d2e51 [2021-12-06 19:13:12,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:13:12,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:13:12,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:12,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:13:12,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:13:12,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@464584b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12, skipping insertion in model container [2021-12-06 19:13:12,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:13:12,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:13:12,781 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-06 19:13:12,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:12,826 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:13:12,858 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_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/sv-benchmarks/c/heap-manipulation/merge_sort-2.i[22632,22645] [2021-12-06 19:13:12,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:13:12,900 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:13:12,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12 WrapperNode [2021-12-06 19:13:12,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:13:12,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:12,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:13:12,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:13:12,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,944 INFO L137 Inliner]: procedures = 128, calls = 83, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 284 [2021-12-06 19:13:12,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:13:12,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:13:12,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:13:12,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:13:12,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:13:12,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:13:12,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:13:12,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:13:12,982 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (1/1) ... [2021-12-06 19:13:12,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:13:12,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:13:13,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:13:13,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:13:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-06 19:13:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2021-12-06 19:13:13,039 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2021-12-06 19:13:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-06 19:13:13,040 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:13:13,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:13:13,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:13:13,125 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:13:13,127 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:13:13,537 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:13:13,542 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:13:13,542 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-06 19:13:13,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:13 BoogieIcfgContainer [2021-12-06 19:13:13,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:13:13,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:13:13,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:13:13,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:13:13,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:13:12" (1/3) ... [2021-12-06 19:13:13,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5800bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:13, skipping insertion in model container [2021-12-06 19:13:13,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:13:12" (2/3) ... [2021-12-06 19:13:13,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5800bece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:13:13, skipping insertion in model container [2021-12-06 19:13:13,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:13:13" (3/3) ... [2021-12-06 19:13:13,549 INFO L111 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2021-12-06 19:13:13,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:13:13,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:13:13,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:13:13,598 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:13:13,598 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:13:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 92 states have internal predecessors, (138), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:13:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:13,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:13,615 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:13,615 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:13,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2116504326, now seen corresponding path program 1 times [2021-12-06 19:13:13,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:13,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371475516] [2021-12-06 19:13:13,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:13,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:13,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:13,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:13,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:13:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:13,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 19:13:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:13,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:13,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:13,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:13,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371475516] [2021-12-06 19:13:13,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371475516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:13,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:13,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:13:13,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038819471] [2021-12-06 19:13:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 19:13:13,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 19:13:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:13,740 INFO L87 Difference]: Start difference. First operand has 95 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 92 states have internal predecessors, (138), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:13,764 INFO L93 Difference]: Finished difference Result 186 states and 333 transitions. [2021-12-06 19:13:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:13:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:13:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:13,772 INFO L225 Difference]: With dead ends: 186 [2021-12-06 19:13:13,772 INFO L226 Difference]: Without dead ends: 86 [2021-12-06 19:13:13,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 19:13:13,777 INFO L933 BasicCegarLoop]: 118 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, 118 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:13,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:13:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-06 19:13:13,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-06 19:13:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 83 states have internal predecessors, (92), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2021-12-06 19:13:13,808 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 7 [2021-12-06 19:13:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:13,808 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2021-12-06 19:13:13,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2021-12-06 19:13:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:13:13,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:13,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:13,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:14,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,010 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2099880948, now seen corresponding path program 1 times [2021-12-06 19:13:14,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735607934] [2021-12-06 19:13:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:14,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:14,016 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:14,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:13:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:13:14,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:14,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:14,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:14,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735607934] [2021-12-06 19:13:14,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735607934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:14,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:14,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:13:14,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904228128] [2021-12-06 19:13:14,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:14,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:13:14,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:13:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:13:14,139 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:14,173 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2021-12-06 19:13:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:13:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 19:13:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:14,175 INFO L225 Difference]: With dead ends: 170 [2021-12-06 19:13:14,175 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 19:13:14,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:13:14,177 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 4 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:14,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 210 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:13:14,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 19:13:14,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-12-06 19:13:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 84 states have internal predecessors, (93), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2021-12-06 19:13:14,185 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 7 [2021-12-06 19:13:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2021-12-06 19:13:14,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2021-12-06 19:13:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 19:13:14,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:14,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:14,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:14,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,388 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -404579866, now seen corresponding path program 1 times [2021-12-06 19:13:14,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:14,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191692439] [2021-12-06 19:13:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:14,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:14,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:14,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:13:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:14,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:13:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:14,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:14,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:14,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191692439] [2021-12-06 19:13:14,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191692439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:14,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:14,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:13:14,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272091133] [2021-12-06 19:13:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:13:14,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:13:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:13:14,580 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:14,758 INFO L93 Difference]: Finished difference Result 235 states and 308 transitions. [2021-12-06 19:13:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:13:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 19:13:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:14,761 INFO L225 Difference]: With dead ends: 235 [2021-12-06 19:13:14,761 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 19:13:14,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:13:14,763 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 516 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:14,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 274 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:13:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 19:13:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 90. [2021-12-06 19:13:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 87 states have internal predecessors, (97), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-12-06 19:13:14,787 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 12 [2021-12-06 19:13:14,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:14,787 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-12-06 19:13:14,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-12-06 19:13:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:13:14,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:14,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:14,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:13:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1696064914, now seen corresponding path program 1 times [2021-12-06 19:13:14,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:14,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848142951] [2021-12-06 19:13:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:14,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:14,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:13:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:13:15,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:15,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:15,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:15,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:15,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:15,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848142951] [2021-12-06 19:13:15,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848142951] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:15,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:15,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-06 19:13:15,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753476549] [2021-12-06 19:13:15,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:15,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:13:15,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:13:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:13:15,561 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:16,895 INFO L93 Difference]: Finished difference Result 276 states and 357 transitions. [2021-12-06 19:13:16,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:13:16,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 19:13:16,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:16,898 INFO L225 Difference]: With dead ends: 276 [2021-12-06 19:13:16,899 INFO L226 Difference]: Without dead ends: 273 [2021-12-06 19:13:16,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:16,900 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 500 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:16,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 441 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:13:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-06 19:13:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 104. [2021-12-06 19:13:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 101 states have internal predecessors, (113), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:16,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 129 transitions. [2021-12-06 19:13:16,919 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 129 transitions. Word has length 19 [2021-12-06 19:13:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:16,919 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 129 transitions. [2021-12-06 19:13:16,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 129 transitions. [2021-12-06 19:13:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 19:13:16,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:16,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:16,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:13:17,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:17,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:17,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2021480904, now seen corresponding path program 1 times [2021-12-06 19:13:17,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:17,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448611122] [2021-12-06 19:13:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:17,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:17,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:17,129 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:17,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:13:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:13:17,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:17,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:17,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:17,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:17,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:17,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:17,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448611122] [2021-12-06 19:13:17,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448611122] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:17,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:17,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-06 19:13:17,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762566040] [2021-12-06 19:13:17,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:17,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:13:17,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:13:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:13:17,504 INFO L87 Difference]: Start difference. First operand 104 states and 129 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:19,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:19,035 INFO L93 Difference]: Finished difference Result 264 states and 340 transitions. [2021-12-06 19:13:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:13:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-06 19:13:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:19,037 INFO L225 Difference]: With dead ends: 264 [2021-12-06 19:13:19,037 INFO L226 Difference]: Without dead ends: 188 [2021-12-06 19:13:19,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:19,039 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 151 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:19,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 566 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:13:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-06 19:13:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 104. [2021-12-06 19:13:19,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 1.2727272727272727) internal successors, (112), 101 states have internal predecessors, (112), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2021-12-06 19:13:19,048 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 19 [2021-12-06 19:13:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:19,048 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2021-12-06 19:13:19,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2021-12-06 19:13:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:13:19,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:19,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:19,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 19:13:19,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:19,250 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:19,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1594907966, now seen corresponding path program 1 times [2021-12-06 19:13:19,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:19,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123681636] [2021-12-06 19:13:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:19,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:19,257 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:19,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:13:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:19,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:13:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:19,415 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:13:19,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:19,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:13:19,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:19,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:19,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123681636] [2021-12-06 19:13:19,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123681636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:19,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:19,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:19,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523499779] [2021-12-06 19:13:19,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:19,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:19,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:19,458 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:20,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:20,195 INFO L93 Difference]: Finished difference Result 209 states and 259 transitions. [2021-12-06 19:13:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:13:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-06 19:13:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:20,197 INFO L225 Difference]: With dead ends: 209 [2021-12-06 19:13:20,197 INFO L226 Difference]: Without dead ends: 206 [2021-12-06 19:13:20,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:13:20,199 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 357 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:20,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 287 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:13:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-12-06 19:13:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 110. [2021-12-06 19:13:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 107 states have internal predecessors, (119), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 135 transitions. [2021-12-06 19:13:20,212 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 135 transitions. Word has length 22 [2021-12-06 19:13:20,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:20,213 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 135 transitions. [2021-12-06 19:13:20,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 135 transitions. [2021-12-06 19:13:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 19:13:20,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:20,214 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:20,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:13:20,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:20,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:20,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1900694176, now seen corresponding path program 2 times [2021-12-06 19:13:20,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:20,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922674950] [2021-12-06 19:13:20,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:13:20,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:20,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:20,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:20,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:13:20,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:13:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:13:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:20,526 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 [2021-12-06 19:13:20,528 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 [2021-12-06 19:13:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:13:20,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:20,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922674950] [2021-12-06 19:13:20,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922674950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:20,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:20,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:13:20,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455291088] [2021-12-06 19:13:20,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:20,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:13:20,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:20,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:13:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:13:20,543 INFO L87 Difference]: Start difference. First operand 110 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:21,225 INFO L93 Difference]: Finished difference Result 137 states and 168 transitions. [2021-12-06 19:13:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:13:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 19:13:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:21,226 INFO L225 Difference]: With dead ends: 137 [2021-12-06 19:13:21,226 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 19:13:21,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:21,227 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 38 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:21,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 288 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:13:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 19:13:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2021-12-06 19:13:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 102 states have internal predecessors, (113), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2021-12-06 19:13:21,235 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 24 [2021-12-06 19:13:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:21,235 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2021-12-06 19:13:21,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2021-12-06 19:13:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 19:13:21,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:21,236 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:21,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 19:13:21,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:21,438 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2068857130, now seen corresponding path program 2 times [2021-12-06 19:13:21,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040891831] [2021-12-06 19:13:21,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:13:21,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:21,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:21,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:21,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:13:21,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:13:21,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:21,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:13:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:21,614 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 31 treesize of output 19 [2021-12-06 19:13:21,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 19:13:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:13:21,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:21,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:21,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040891831] [2021-12-06 19:13:21,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040891831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:21,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:21,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:13:21,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396917809] [2021-12-06 19:13:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:21,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:13:21,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:21,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:13:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:13:21,636 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:22,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:22,236 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2021-12-06 19:13:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:13:22,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 19:13:22,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:22,238 INFO L225 Difference]: With dead ends: 107 [2021-12-06 19:13:22,238 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 19:13:22,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:22,239 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 11 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:22,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 307 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 19:13:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 19:13:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-12-06 19:13:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2444444444444445) internal successors, (112), 101 states have internal predecessors, (112), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2021-12-06 19:13:22,249 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 24 [2021-12-06 19:13:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:22,250 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2021-12-06 19:13:22,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2021-12-06 19:13:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 19:13:22,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:22,251 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:22,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:13:22,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:22,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1214031067, now seen corresponding path program 1 times [2021-12-06 19:13:22,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431368687] [2021-12-06 19:13:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:22,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:22,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:22,458 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:22,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:13:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 19:13:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:22,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:13:22,610 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:13:22,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 19:13:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:22,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:22,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:22,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 19:13:22,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:13:22,876 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 19:13:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2021-12-06 19:13:22,884 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:13:22,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 19:13:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:22,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:22,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:22,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431368687] [2021-12-06 19:13:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431368687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:22,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:22,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:22,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938009915] [2021-12-06 19:13:22,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:22,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:22,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:22,902 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:24,888 INFO L93 Difference]: Finished difference Result 271 states and 344 transitions. [2021-12-06 19:13:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:13:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-06 19:13:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:24,890 INFO L225 Difference]: With dead ends: 271 [2021-12-06 19:13:24,890 INFO L226 Difference]: Without dead ends: 268 [2021-12-06 19:13:24,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:13:24,891 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 529 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:24,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 322 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-06 19:13:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-06 19:13:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 107. [2021-12-06 19:13:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 104 states have internal predecessors, (115), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2021-12-06 19:13:24,901 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 25 [2021-12-06 19:13:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:24,901 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2021-12-06 19:13:24,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:24,901 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2021-12-06 19:13:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:13:24,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:24,902 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] [2021-12-06 19:13:24,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:13:25,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:25,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 361371631, now seen corresponding path program 1 times [2021-12-06 19:13:25,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:25,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692614496] [2021-12-06 19:13:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:25,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:25,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:25,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:25,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:13:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 19:13:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:25,298 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:13:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:25,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:13:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:13:25,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:25,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692614496] [2021-12-06 19:13:25,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692614496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:25,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:25,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:13:25,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571124314] [2021-12-06 19:13:25,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:25,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:13:25,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:13:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:13:25,349 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:26,171 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2021-12-06 19:13:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:13:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 19:13:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:26,172 INFO L225 Difference]: With dead ends: 199 [2021-12-06 19:13:26,172 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 19:13:26,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:13:26,173 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 341 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:26,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 275 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:13:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 19:13:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 113. [2021-12-06 19:13:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 110 states have internal predecessors, (121), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:26,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-12-06 19:13:26,182 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 27 [2021-12-06 19:13:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:26,182 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-12-06 19:13:26,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-12-06 19:13:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 19:13:26,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:26,183 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] [2021-12-06 19:13:26,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:26,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:26,385 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:26,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:26,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2027066889, now seen corresponding path program 1 times [2021-12-06 19:13:26,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:26,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838705429] [2021-12-06 19:13:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:26,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:26,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:26,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:26,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:13:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 19:13:26,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:26,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:13:26,659 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:13:26,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 19:13:26,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:26,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:26,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:13:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:26,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-12-06 19:13:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:13:26,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-12-06 19:13:26,902 INFO L354 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2021-12-06 19:13:26,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 35 [2021-12-06 19:13:26,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:13:26,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-12-06 19:13:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:13:26,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:26,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838705429] [2021-12-06 19:13:26,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838705429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:26,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:26,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:26,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158414184] [2021-12-06 19:13:26,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:26,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:26,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:26,929 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:28,683 INFO L93 Difference]: Finished difference Result 269 states and 340 transitions. [2021-12-06 19:13:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:13:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-06 19:13:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:28,686 INFO L225 Difference]: With dead ends: 269 [2021-12-06 19:13:28,686 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 19:13:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:13:28,686 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 521 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:28,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 322 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:13:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 19:13:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 116. [2021-12-06 19:13:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 113 states have internal predecessors, (124), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-12-06 19:13:28,697 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 30 [2021-12-06 19:13:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:28,697 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-12-06 19:13:28,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-12-06 19:13:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 19:13:28,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:28,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:28,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:13:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:28,900 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:28,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1330919514, now seen corresponding path program 1 times [2021-12-06 19:13:28,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:28,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871398847] [2021-12-06 19:13:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:28,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:28,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:28,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 19:13:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:28,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:13:28,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:29,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:29,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:29,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871398847] [2021-12-06 19:13:29,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871398847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:29,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:29,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:13:29,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161135003] [2021-12-06 19:13:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:29,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:13:29,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:13:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:13:29,020 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:29,114 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2021-12-06 19:13:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:13:29,115 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 19:13:29,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:29,116 INFO L225 Difference]: With dead ends: 154 [2021-12-06 19:13:29,116 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 19:13:29,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:29,117 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 201 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:29,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 272 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:13:29,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 19:13:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2021-12-06 19:13:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 117 states have internal predecessors, (129), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 143 transitions. [2021-12-06 19:13:29,131 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 143 transitions. Word has length 31 [2021-12-06 19:13:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:29,131 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 143 transitions. [2021-12-06 19:13:29,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 143 transitions. [2021-12-06 19:13:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 19:13:29,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:29,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:29,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:13:29,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:29,333 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1708376279, now seen corresponding path program 1 times [2021-12-06 19:13:29,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586118205] [2021-12-06 19:13:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:29,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:29,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:29,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:29,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:13:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:13:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:29,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:29,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:29,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:29,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:29,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586118205] [2021-12-06 19:13:29,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586118205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:29,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:29,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-06 19:13:29,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427262190] [2021-12-06 19:13:29,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:29,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:13:29,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:13:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:13:29,790 INFO L87 Difference]: Start difference. First operand 120 states and 143 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:30,892 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-12-06 19:13:30,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:13:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 19:13:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:30,894 INFO L225 Difference]: With dead ends: 171 [2021-12-06 19:13:30,894 INFO L226 Difference]: Without dead ends: 168 [2021-12-06 19:13:30,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:30,894 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 83 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:30,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 441 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 19:13:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-12-06 19:13:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 139. [2021-12-06 19:13:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 125 states have (on average 1.192) internal successors, (149), 136 states have internal predecessors, (149), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:30,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2021-12-06 19:13:30,906 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 34 [2021-12-06 19:13:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:30,907 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2021-12-06 19:13:30,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2021-12-06 19:13:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 19:13:30,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:30,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:30,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 19:13:31,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:31,109 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:31,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1210378434, now seen corresponding path program 1 times [2021-12-06 19:13:31,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:31,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870859787] [2021-12-06 19:13:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:31,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:31,113 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:31,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:13:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:13:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:31,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:31,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:13:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:31,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:31,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:31,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870859787] [2021-12-06 19:13:31,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870859787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:31,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:31,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-06 19:13:31,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157722605] [2021-12-06 19:13:31,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:31,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:13:31,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:31,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:13:31,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:13:31,414 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:33,834 INFO L93 Difference]: Finished difference Result 409 states and 534 transitions. [2021-12-06 19:13:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 19:13:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 19:13:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:33,836 INFO L225 Difference]: With dead ends: 409 [2021-12-06 19:13:33,836 INFO L226 Difference]: Without dead ends: 405 [2021-12-06 19:13:33,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:13:33,837 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 1157 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:33,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 755 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:13:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-06 19:13:33,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 145. [2021-12-06 19:13:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 142 states have internal predecessors, (156), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-12-06 19:13:33,853 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 35 [2021-12-06 19:13:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:33,853 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-12-06 19:13:33,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-12-06 19:13:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:13:33,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:33,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:33,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 19:13:34,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:34,055 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash 749828415, now seen corresponding path program 1 times [2021-12-06 19:13:34,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:34,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580902634] [2021-12-06 19:13:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:34,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:34,060 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:34,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 19:13:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:13:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:34,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:34,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:34,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:34,447 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580902634] [2021-12-06 19:13:34,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580902634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:34,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:34,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-12-06 19:13:34,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173097269] [2021-12-06 19:13:34,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:34,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:34,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:34,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:34,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:34,448 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:34,785 INFO L93 Difference]: Finished difference Result 200 states and 239 transitions. [2021-12-06 19:13:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:13:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-06 19:13:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:34,786 INFO L225 Difference]: With dead ends: 200 [2021-12-06 19:13:34,786 INFO L226 Difference]: Without dead ends: 159 [2021-12-06 19:13:34,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:13:34,787 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 40 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:34,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 330 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:13:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-12-06 19:13:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2021-12-06 19:13:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.183206106870229) internal successors, (155), 142 states have internal predecessors, (155), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:34,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 169 transitions. [2021-12-06 19:13:34,799 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 169 transitions. Word has length 36 [2021-12-06 19:13:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:34,799 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 169 transitions. [2021-12-06 19:13:34,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 169 transitions. [2021-12-06 19:13:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:13:34,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:34,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:34,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 19:13:35,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:35,001 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:35,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:35,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1116813069, now seen corresponding path program 1 times [2021-12-06 19:13:35,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:35,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764557806] [2021-12-06 19:13:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:35,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:35,006 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:35,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:13:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:35,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:13:35,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 19:13:35,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-06 19:13:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:13:35,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:35,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764557806] [2021-12-06 19:13:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764557806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:35,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:35,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:35,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826962299] [2021-12-06 19:13:35,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:35,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:35,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:35,255 INFO L87 Difference]: Start difference. First operand 145 states and 169 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:36,693 INFO L93 Difference]: Finished difference Result 188 states and 226 transitions. [2021-12-06 19:13:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:13:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-06 19:13:36,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:36,694 INFO L225 Difference]: With dead ends: 188 [2021-12-06 19:13:36,694 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:13:36,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:36,695 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 89 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:36,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 436 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:13:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:13:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 157. [2021-12-06 19:13:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 143 states have (on average 1.1818181818181819) internal successors, (169), 154 states have internal predecessors, (169), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2021-12-06 19:13:36,711 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 37 [2021-12-06 19:13:36,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:36,711 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2021-12-06 19:13:36,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2021-12-06 19:13:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:13:36,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:36,712 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:36,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 19:13:36,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:36,913 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1178426459, now seen corresponding path program 2 times [2021-12-06 19:13:36,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:36,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956402483] [2021-12-06 19:13:36,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:13:36,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:36,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:36,918 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:36,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 19:13:37,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:13:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:37,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:13:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:37,189 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 [2021-12-06 19:13:37,192 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 [2021-12-06 19:13:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 19:13:37,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:13:37,208 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:37,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956402483] [2021-12-06 19:13:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956402483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:13:37,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:13:37,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:13:37,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219566375] [2021-12-06 19:13:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:13:37,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:13:37,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:37,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:13:37,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:13:37,209 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:38,158 INFO L93 Difference]: Finished difference Result 187 states and 224 transitions. [2021-12-06 19:13:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:13:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-06 19:13:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:38,160 INFO L225 Difference]: With dead ends: 187 [2021-12-06 19:13:38,160 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 19:13:38,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:38,161 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 95 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:38,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 436 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:13:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 19:13:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 152. [2021-12-06 19:13:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 138 states have (on average 1.181159420289855) internal successors, (163), 149 states have internal predecessors, (163), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2021-12-06 19:13:38,175 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 39 [2021-12-06 19:13:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:38,176 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2021-12-06 19:13:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2021-12-06 19:13:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:13:38,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:38,176 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:38,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 19:13:38,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:38,377 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1081270413, now seen corresponding path program 2 times [2021-12-06 19:13:38,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:38,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479579597] [2021-12-06 19:13:38,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:13:38,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:38,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:38,380 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:38,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 19:13:38,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:13:38,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:13:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:13:38,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:13:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:13:38,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:13:38,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479579597] [2021-12-06 19:13:38,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479579597] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:38,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:38,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-12-06 19:13:38,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042522376] [2021-12-06 19:13:38,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:38,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 19:13:38,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:38,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 19:13:38,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:13:38,745 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:40,633 INFO L93 Difference]: Finished difference Result 257 states and 316 transitions. [2021-12-06 19:13:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:13:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 19:13:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:40,634 INFO L225 Difference]: With dead ends: 257 [2021-12-06 19:13:40,635 INFO L226 Difference]: Without dead ends: 194 [2021-12-06 19:13:40,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-12-06 19:13:40,635 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 375 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:40,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 772 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 19:13:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-12-06 19:13:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 138. [2021-12-06 19:13:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.185483870967742) internal successors, (147), 135 states have internal predecessors, (147), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-12-06 19:13:40,649 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 41 [2021-12-06 19:13:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-12-06 19:13:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-12-06 19:13:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:13:40,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:40,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:40,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 19:13:40,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:40,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1304250571, now seen corresponding path program 1 times [2021-12-06 19:13:40,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:40,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74530256] [2021-12-06 19:13:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:40,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:40,851 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:40,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 19:13:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:40,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:13:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:40,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:13:41,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:41,062 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:13:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 19:13:41,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 19:13:41,151 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:13:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 19:13:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:41,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:13:41,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:13:41,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 19:13:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:43,754 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 19:13:43,912 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_667 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_667))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 19:13:44,038 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~node~1#1.base_17| (_ BitVec 32))) (or (= |v_ULTIMATE.start_main_~node~1#1.base_17| (_ bv0 32)) (forall ((v_ArrVal_667 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_17| v_ArrVal_667))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |v_ULTIMATE.start_main_~node~1#1.base_17|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_17|)))))) is different from false [2021-12-06 19:13:44,091 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:13:44,091 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2021-12-06 19:13:44,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:13:44,106 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 159 treesize of output 157 [2021-12-06 19:13:44,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 206 [2021-12-06 19:13:44,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 98 [2021-12-06 19:13:44,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2021-12-06 19:13:44,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 19:13:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-06 19:13:44,468 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:44,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74530256] [2021-12-06 19:13:44,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74530256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:44,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:44,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-06 19:13:44,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251805551] [2021-12-06 19:13:44,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:13:44,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:44,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:13:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=177, Unknown=3, NotChecked=84, Total=306 [2021-12-06 19:13:44,470 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:44,869 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|))))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (= |c_ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|))) (_ bv1 1))) (forall ((v_ArrVal_667 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_667))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:13:45,229 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (forall ((v_ArrVal_667 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_667))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:13:47,271 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (= |c_ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|))) (_ bv1 1)))) is different from false [2021-12-06 19:13:47,589 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (select .cse3 (_ bv0 32))) (.cse1 (select .cse3 (_ bv4 32)))) (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|))))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= .cse0 (_ bv0 32))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (not (= .cse1 .cse0)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32))) (not (= (select (select |c_#memory_$Pointer$.base| .cse1) (_ bv0 32)) (_ bv0 32))) (forall ((v_ArrVal_667 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_667))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))))) is different from false [2021-12-06 19:13:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:13:49,488 INFO L93 Difference]: Finished difference Result 156 states and 180 transitions. [2021-12-06 19:13:49,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 19:13:49,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 19:13:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:13:49,490 INFO L225 Difference]: With dead ends: 156 [2021-12-06 19:13:49,490 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 19:13:49,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=96, Invalid=344, Unknown=8, NotChecked=308, Total=756 [2021-12-06 19:13:49,491 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 199 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:13:49,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 919 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 314 Invalid, 0 Unknown, 325 Unchecked, 1.9s Time] [2021-12-06 19:13:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 19:13:49,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2021-12-06 19:13:49,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 130 states have (on average 1.176923076923077) internal successors, (153), 141 states have internal predecessors, (153), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:13:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2021-12-06 19:13:49,506 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 41 [2021-12-06 19:13:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:13:49,506 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2021-12-06 19:13:49,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2021-12-06 19:13:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 19:13:49,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:13:49,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:13:49,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 19:13:49,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:13:49,708 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:13:49,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:13:49,709 INFO L85 PathProgramCache]: Analyzing trace with hash 517314090, now seen corresponding path program 1 times [2021-12-06 19:13:49,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:13:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804955082] [2021-12-06 19:13:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:13:49,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:13:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:13:49,713 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:13:49,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 19:13:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:13:49,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 19:13:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:13:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:13:49,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:49,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:13:49,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:13:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 19:13:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:13:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:13:50,058 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:13:50,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 19:13:50,079 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 19:13:50,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:13:50,601 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-12-06 19:13:50,601 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 16 [2021-12-06 19:13:50,877 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-06 19:13:50,877 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 28 [2021-12-06 19:13:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:13:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:13:53,440 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|))) (or (and (forall ((v_ArrVal_731 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_731) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)))) (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))) (not (= (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))))) is different from false [2021-12-06 19:13:53,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_730 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_730))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))) (and (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32)) (forall ((v_ArrVal_729 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_731 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_729))) (store .cse1 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse1 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_731) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))))))) is different from false [2021-12-06 19:13:54,646 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:13:54,646 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 123 [2021-12-06 19:13:54,701 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:13:54,701 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 115 [2021-12-06 19:13:54,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:13:54,724 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 333 treesize of output 323 [2021-12-06 19:13:54,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:13:54,754 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 740 treesize of output 724 [2021-12-06 19:13:54,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 19:13:54,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1048 treesize of output 1006 [2021-12-06 19:13:54,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 847 treesize of output 819 [2021-12-06 19:13:55,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 178 [2021-12-06 19:13:56,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 154 [2021-12-06 19:13:56,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 154 [2021-12-06 19:13:56,387 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 19:13:56,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 289 [2021-12-06 19:13:56,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 19:13:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 19:13:56,596 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:13:56,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804955082] [2021-12-06 19:13:56,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804955082] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:13:56,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:13:56,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-12-06 19:13:56,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271749021] [2021-12-06 19:13:56,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:13:56,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 19:13:56,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:13:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 19:13:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=327, Unknown=4, NotChecked=74, Total=462 [2021-12-06 19:13:56,598 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:13:57,038 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~data~0#1.base|))))) (forall ((v_ArrVal_730 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_730))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))) (and (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32)) (forall ((v_ArrVal_729 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_731 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_729))) (store .cse1 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse1 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_731) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))))))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32)) (_ bv0 32))) is different from false [2021-12-06 19:13:57,474 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (forall ((v_ArrVal_730 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_730))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))) (and (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32)) (forall ((v_ArrVal_729 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_731 (_ BitVec 32))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_729))) (store .cse1 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse1 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_731) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))))))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32)) (_ bv0 32))) is different from false [2021-12-06 19:13:59,551 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (= |c_ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32))) (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse0 (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|))) (or (and (forall ((v_ArrVal_731 (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_731) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)))) (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))) (not (= (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))))) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32)) (_ bv0 32))) is different from false [2021-12-06 19:14:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:02,980 INFO L93 Difference]: Finished difference Result 188 states and 214 transitions. [2021-12-06 19:14:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:14:02,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-06 19:14:02,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:02,982 INFO L225 Difference]: With dead ends: 188 [2021-12-06 19:14:02,982 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 19:14:02,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=117, Invalid=598, Unknown=7, NotChecked=270, Total=992 [2021-12-06 19:14:02,983 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 122 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:02,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1145 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 414 Invalid, 0 Unknown, 397 Unchecked, 3.0s Time] [2021-12-06 19:14:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 19:14:02,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 175. [2021-12-06 19:14:02,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 161 states have (on average 1.15527950310559) internal successors, (186), 172 states have internal predecessors, (186), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:14:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 200 transitions. [2021-12-06 19:14:02,998 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 200 transitions. Word has length 41 [2021-12-06 19:14:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:02,998 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 200 transitions. [2021-12-06 19:14:02,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 22 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:14:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 200 transitions. [2021-12-06 19:14:02,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 19:14:02,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:02,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:03,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 19:14:03,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:03,199 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1183803585, now seen corresponding path program 1 times [2021-12-06 19:14:03,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:03,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354826398] [2021-12-06 19:14:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:03,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:03,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:03,202 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:03,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 19:14:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:14:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:03,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:14:03,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-12-06 19:14:03,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:14:03,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-12-06 19:14:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:14:03,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:14:03,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:14:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354826398] [2021-12-06 19:14:03,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354826398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:14:03,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:14:03,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:14:03,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461223409] [2021-12-06 19:14:03,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:14:03,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:14:03,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:14:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:14:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:14:03,628 INFO L87 Difference]: Start difference. First operand 175 states and 200 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:14:04,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:14:04,599 INFO L93 Difference]: Finished difference Result 185 states and 210 transitions. [2021-12-06 19:14:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:14:04,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-06 19:14:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:14:04,600 INFO L225 Difference]: With dead ends: 185 [2021-12-06 19:14:04,600 INFO L226 Difference]: Without dead ends: 180 [2021-12-06 19:14:04,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:14:04,601 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 39 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:14:04,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 514 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 35 Unchecked, 0.8s Time] [2021-12-06 19:14:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-06 19:14:04,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-12-06 19:14:04,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 165 states have (on average 1.1515151515151516) internal successors, (190), 176 states have internal predecessors, (190), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:14:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2021-12-06 19:14:04,616 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 43 [2021-12-06 19:14:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:14:04,616 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2021-12-06 19:14:04,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:14:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2021-12-06 19:14:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:14:04,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:14:04,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:14:04,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-06 19:14:04,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:14:04,818 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:14:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:14:04,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1746315726, now seen corresponding path program 1 times [2021-12-06 19:14:04,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:14:04,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63645822] [2021-12-06 19:14:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:14:04,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:14:04,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:14:04,823 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:14:04,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 19:14:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:14:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 19:14:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:14:05,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:14:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:14:05,087 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:14:05,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 19:14:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:14:05,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 19:14:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:14:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,291 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 19:14:05,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 59 [2021-12-06 19:14:05,580 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 19:14:05,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 51 [2021-12-06 19:14:05,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 19:14:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,635 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-12-06 19:14:05,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 42 [2021-12-06 19:14:05,835 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 19:14:05,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 50 [2021-12-06 19:14:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 47 [2021-12-06 19:14:08,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:14:08,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:14:08,728 INFO L354 Elim1Store]: treesize reduction 167, result has 8.2 percent of original size [2021-12-06 19:14:08,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 27 case distinctions, treesize of input 207 treesize of output 110 [2021-12-06 19:14:08,759 INFO L354 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2021-12-06 19:14:08,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 34 [2021-12-06 19:14:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:14:08,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:14:17,564 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_824 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_825 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_823 (_ BitVec 1)) (|v_ULTIMATE.start_main_~node~1#1.base_22| (_ BitVec 32)) (|v_ULTIMATE.start_main_~item~0#1.base_25| (_ BitVec 32))) (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_22| v_ArrVal_825))) (let ((.cse8 (store (store (select .cse10 |v_ULTIMATE.start_main_~item~0#1.base_25|) (_ bv0 32) |v_ULTIMATE.start_main_~node~1#1.base_22|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse9 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_22| v_ArrVal_824))) (let ((.cse7 (store (store (select .cse9 |v_ULTIMATE.start_main_~item~0#1.base_25|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse4 (store .cse10 |v_ULTIMATE.start_main_~item~0#1.base_25| .cse8))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse1 (store .cse9 |v_ULTIMATE.start_main_~item~0#1.base_25| .cse7)) (.cse5 (select .cse8 (_ bv0 32))) (.cse6 (select .cse7 (_ bv0 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22| v_ArrVal_823) |v_ULTIMATE.start_main_~item~0#1.base_25|))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_22|)))) (not (= (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_823) (_ bv1 1)))) (let ((.cse2 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse3 (select (select .cse1 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse1 .cse2) .cse3) (_ bv0 32)) (= (select (select .cse4 .cse2) .cse3) (_ bv0 32)))) (not (= (_ bv0 32) (select (select .cse4 .cse5) .cse6))) (not (= (select (select .cse1 .cse5) .cse6) (_ bv0 32))))))))) is different from false [2021-12-06 19:14:57,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,047 INFO L354 Elim1Store]: treesize reduction 110, result has 33.3 percent of original size [2021-12-06 19:15:00,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 976 treesize of output 660 [2021-12-06 19:15:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,450 INFO L354 Elim1Store]: treesize reduction 110, result has 33.3 percent of original size [2021-12-06 19:15:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 705 treesize of output 315 [2021-12-06 19:15:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,672 INFO L354 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2021-12-06 19:15:00,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 949 treesize of output 875 [2021-12-06 19:15:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:15:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:00,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 690 treesize of output 654 [2021-12-06 19:15:00,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:00,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 580 treesize of output 570 [2021-12-06 19:15:00,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 272 [2021-12-06 19:15:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2021-12-06 19:15:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:05,277 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-06 19:15:05,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 19:15:05,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 19:15:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-12-06 19:15:05,602 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 19:15:05,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 82 [2021-12-06 19:15:05,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:05,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 164 treesize of output 168 [2021-12-06 19:15:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 1 not checked. [2021-12-06 19:15:15,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:15:15,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63645822] [2021-12-06 19:15:15,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63645822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:15:15,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:15:15,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-12-06 19:15:15,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363762222] [2021-12-06 19:15:15,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:15:15,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:15:15,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:15:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:15:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=549, Unknown=13, NotChecked=48, Total=702 [2021-12-06 19:15:15,017 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:15:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:15:20,016 INFO L93 Difference]: Finished difference Result 185 states and 210 transitions. [2021-12-06 19:15:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:15:20,017 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 19:15:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:15:20,017 INFO L225 Difference]: With dead ends: 185 [2021-12-06 19:15:20,018 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 19:15:20,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=129, Invalid=785, Unknown=20, NotChecked=58, Total=992 [2021-12-06 19:15:20,018 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 53 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 496 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:15:20,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1519 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 496 Unchecked, 3.2s Time] [2021-12-06 19:15:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 19:15:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-12-06 19:15:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 168 states have (on average 1.1488095238095237) internal successors, (193), 179 states have internal predecessors, (193), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:15:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-12-06 19:15:20,034 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 44 [2021-12-06 19:15:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:15:20,034 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-12-06 19:15:20,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.037037037037037) internal successors, (82), 27 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:15:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-12-06 19:15:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 19:15:20,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:15:20,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:15:20,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-06 19:15:20,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:15:20,235 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:15:20,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:15:20,236 INFO L85 PathProgramCache]: Analyzing trace with hash 795082204, now seen corresponding path program 1 times [2021-12-06 19:15:20,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:15:20,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98892133] [2021-12-06 19:15:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:15:20,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:15:20,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:15:20,237 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:15:20,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 19:15:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:20,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:15:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:15:20,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:15:20,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:15:20,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:15:20,483 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:15:20,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 19:15:20,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:15:20,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:15:20,588 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:15:20,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 19:15:20,604 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 19:15:20,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:15:21,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:21,728 INFO L354 Elim1Store]: treesize reduction 119, result has 27.9 percent of original size [2021-12-06 19:15:21,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 118 treesize of output 105 [2021-12-06 19:15:21,753 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-12-06 19:15:21,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 45 [2021-12-06 19:15:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:15:21,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:15:25,757 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (_ BitVec 32)) (v_ArrVal_891 (_ BitVec 32)) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse11 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|))) (let ((.cse9 (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_891) .cse11 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_893) .cse11 |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse3 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse1 (select .cse10 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse2 (select .cse9 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse6 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse4 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (not (= (select (select .cse3 .cse1) .cse2) (_ bv0 32))) (let ((.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select .cse4 .cse5) (_ bv0 32)) (= (select .cse6 .cse5) (_ bv0 32)))) (let ((.cse7 (select .cse4 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse8 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse3 .cse7) .cse8) (_ bv0 32)) (= (select (select .cse0 .cse7) .cse8) (_ bv0 32)))))))))) is different from false [2021-12-06 19:15:27,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (_ BitVec 32)) (v_ArrVal_891 (_ BitVec 32)) (v_ArrVal_887 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_888 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_887)) (.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_888))) (let ((.cse9 (store (store (select .cse11 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_891) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select .cse12 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_893) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse3 (store .cse12 |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse0 (store .cse11 |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse1 (select .cse10 (_ bv0 32))) (.cse2 (select .cse9 (_ bv0 32))) (.cse6 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse7 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (not (= (select (select .cse3 .cse1) .cse2) (_ bv0 32))) (let ((.cse4 (select .cse7 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse5 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse3 .cse4) .cse5) (_ bv0 32)) (= (select (select .cse0 .cse4) .cse5) (_ bv0 32)))) (let ((.cse8 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (_ bv0 32) (select .cse6 .cse8)) (= (select .cse7 .cse8) (_ bv0 32)))))))))) is different from false [2021-12-06 19:15:31,772 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:15:31,772 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 601 treesize of output 463 [2021-12-06 19:15:31,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:31,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:31,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 307 [2021-12-06 19:15:33,254 INFO L354 Elim1Store]: treesize reduction 150, result has 57.3 percent of original size [2021-12-06 19:15:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 6351 treesize of output 6073 [2021-12-06 19:15:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:15:33,619 INFO L244 Elim1Store]: Index analysis took 141 ms [2021-12-06 19:15:36,076 INFO L354 Elim1Store]: treesize reduction 58, result has 82.8 percent of original size [2021-12-06 19:15:36,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 38259 treesize of output 35749 [2021-12-06 19:15:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:38,246 INFO L354 Elim1Store]: treesize reduction 88, result has 68.5 percent of original size [2021-12-06 19:15:38,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 113437 treesize of output 106361 [2021-12-06 19:15:44,625 WARN L227 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 1521 DAG size of output: 1487 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:15:45,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:45,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:15:45,522 INFO L244 Elim1Store]: Index analysis took 133 ms [2021-12-06 19:15:46,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:15:46,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 98487 treesize of output 96017 [2021-12-06 19:15:48,288 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:15:48,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98892133] [2021-12-06 19:15:48,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 19:15:48,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117357459] [2021-12-06 19:15:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:15:48,289 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:15:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:15:48,290 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:15:48,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-12-06 19:15:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:15:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:15:48,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:15:48,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:15:48,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:15:48,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:15:48,599 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:15:48,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 19:15:48,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:15:48,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:15:48,758 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:15:48,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 19:15:48,777 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 19:15:48,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:15:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:15:51,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:15:51,465 INFO L354 Elim1Store]: treesize reduction 155, result has 6.1 percent of original size [2021-12-06 19:15:51,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 14 case distinctions, treesize of input 141 treesize of output 80 [2021-12-06 19:15:51,488 INFO L354 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2021-12-06 19:15:51,488 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 8 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 25 [2021-12-06 19:15:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:15:51,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:15:54,731 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_957 (_ BitVec 32)) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse11 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|))) (let ((.cse10 (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) .cse11 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse9 (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_957) .cse11 |c_ULTIMATE.start_main_~data~0#1.offset|))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| .cse9)) (.cse3 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| .cse10))) (let ((.cse5 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse4 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse6 (select .cse10 |c_ULTIMATE.start_main_~item~0#1.offset|)) (.cse7 (select .cse9 |c_ULTIMATE.start_main_~item~0#1.offset|))) (or (let ((.cse1 (select .cse5 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse2 (select .cse4 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse0 .cse1) .cse2) (_ bv0 32)) (= (select (select .cse3 .cse1) .cse2) (_ bv0 32)))) (not (= (_ bv0 32) (select (select .cse3 .cse6) .cse7))) (let ((.cse8 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select .cse5 .cse8) (_ bv0 32)) (= (select .cse4 .cse8) (_ bv0 32)))) (not (= (_ bv0 32) (select (select .cse0 .cse6) .cse7))))))))) is different from false [2021-12-06 19:15:56,017 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_957 (_ BitVec 32)) (v_ArrVal_950 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_951 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (let ((.cse12 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_950)) (.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_951))) (let ((.cse9 (store (store (select .cse11 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_957) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse10 (store (store (select .cse12 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store .cse12 |ULTIMATE.start_main_~item~0#1.base| .cse10)) (.cse6 (store .cse11 |ULTIMATE.start_main_~item~0#1.base| .cse9))) (let ((.cse1 (select .cse10 (_ bv0 32))) (.cse2 (select .cse9 (_ bv0 32))) (.cse5 (select .cse6 |c_ULTIMATE.start_main_~data~0#1.base|)) (.cse3 (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select .cse3 .cse4) (_ bv0 32)) (= (select .cse5 .cse4) (_ bv0 32)))) (not (= (select (select .cse6 .cse1) .cse2) (_ bv0 32))) (let ((.cse7 (select .cse3 |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse8 (select .cse5 |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (_ bv0 32) (select (select .cse6 .cse7) .cse8)) (= (_ bv0 32) (select (select .cse0 .cse7) .cse8)))))))))) is different from false [2021-12-06 19:16:02,171 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:16:02,172 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 601 treesize of output 463 [2021-12-06 19:16:02,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:16:02,232 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:16:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 445 treesize of output 307 [2021-12-06 19:16:02,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:16:02,468 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 3149 treesize of output 3005 [2021-12-06 19:16:04,573 INFO L354 Elim1Store]: treesize reduction 142, result has 59.5 percent of original size [2021-12-06 19:16:04,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 35640 treesize of output 32940 [2021-12-06 19:16:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:16:06,695 INFO L354 Elim1Store]: treesize reduction 198, result has 58.8 percent of original size [2021-12-06 19:16:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 113966 treesize of output 107492 [2021-12-06 19:16:14,436 WARN L227 SmtUtils]: Spent 7.74s on a formula simplification. DAG size of input: 1310 DAG size of output: 1292 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:16:15,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:16:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:16:16,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:16:16,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 139377 treesize of output 135921 [2021-12-06 19:16:21,777 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 1600 DAG size of output: 1523 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 19:16:22,979 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-06 19:16:22,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670002784] [2021-12-06 19:16:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:16:22,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:16:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:16:22,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:16:22,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 19:16:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:16:23,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 19:16:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:16:23,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:16:23,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:16:23,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:16:23,144 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:16:23,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-06 19:16:23,301 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:16:23,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 19:16:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:16:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:16:23,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 19:16:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:16:24,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:16:24,219 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 19:16:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2021-12-06 19:16:24,231 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:16:24,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 19:16:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:16:24,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:16:25,343 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_31| (_ BitVec 32))) (or (and (forall ((v_ArrVal_1016 (_ BitVec 32)) (v_ArrVal_1014 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1014))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_31| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_31|) (_ bv0 32) v_ArrVal_1016) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32))) (forall ((v_ArrVal_1019 (_ BitVec 32)) (v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1015))) (store .cse1 |v_ULTIMATE.start_main_~item~0#1.base_31| (store (store (select .cse1 |v_ULTIMATE.start_main_~item~0#1.base_31|) (_ bv0 32) v_ArrVal_1019) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32)))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~item~0#1.base_31|))))))) is different from false [2021-12-06 19:16:25,574 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~node~1#1.base_26| (_ BitVec 32)) (v_ArrVal_1013 (_ BitVec 1)) (|v_ULTIMATE.start_main_~item~0#1.base_31| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_26| v_ArrVal_1013) |v_ULTIMATE.start_main_~item~0#1.base_31|)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_26|))))))) (and (forall ((v_ArrVal_1019 (_ BitVec 32)) (v_ArrVal_1015 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_26| v_ArrVal_1015))) (store .cse0 |v_ULTIMATE.start_main_~item~0#1.base_31| (store (store (select .cse0 |v_ULTIMATE.start_main_~item~0#1.base_31|) (_ bv0 32) v_ArrVal_1019) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)))) (forall ((v_ArrVal_1016 (_ BitVec 32)) (v_ArrVal_1014 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_26| v_ArrVal_1014))) (store .cse1 |v_ULTIMATE.start_main_~item~0#1.base_31| (store (store (select .cse1 |v_ULTIMATE.start_main_~item~0#1.base_31|) (_ bv0 32) v_ArrVal_1016) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (_ bv0 32)))))) is different from false [2021-12-06 19:16:25,693 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:16:25,694 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 105 treesize of output 98 [2021-12-06 19:16:25,826 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:16:25,826 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 90 [2021-12-06 19:16:25,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:16:25,861 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 308 treesize of output 298 [2021-12-06 19:16:25,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:16:25,896 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 598 treesize of output 586 [2021-12-06 19:16:25,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1009 treesize of output 961 [2021-12-06 19:16:25,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1195 treesize of output 1167 [2021-12-06 19:17:14,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 437 treesize of output 409 [2021-12-06 19:17:15,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 248 [2021-12-06 19:17:20,533 INFO L354 Elim1Store]: treesize reduction 1, result has 87.5 percent of original size [2021-12-06 19:17:20,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 104 [2021-12-06 19:17:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 19:17:20,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670002784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:17:20,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:17:20,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-06 19:17:20,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444853949] [2021-12-06 19:17:20,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:17:20,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:17:20,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:17:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:17:20,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1700, Unknown=19, NotChecked=534, Total=2450 [2021-12-06 19:17:20,620 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:17:22,249 INFO L93 Difference]: Finished difference Result 261 states and 306 transitions. [2021-12-06 19:17:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:17:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 19:17:22,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:17:22,253 INFO L225 Difference]: With dead ends: 261 [2021-12-06 19:17:22,253 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 19:17:22,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 193 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=218, Invalid=1857, Unknown=19, NotChecked=558, Total=2652 [2021-12-06 19:17:22,255 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 21 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:17:22,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1122 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 0 Unknown, 279 Unchecked, 1.2s Time] [2021-12-06 19:17:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 19:17:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-12-06 19:17:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 172 states have internal predecessors, (185), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:17:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 199 transitions. [2021-12-06 19:17:22,270 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 199 transitions. Word has length 44 [2021-12-06 19:17:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:17:22,270 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 199 transitions. [2021-12-06 19:17:22,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 199 transitions. [2021-12-06 19:17:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:17:22,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:17:22,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:17:22,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 19:17:22,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-12-06 19:17:22,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-12-06 19:17:22,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:17:22,873 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:17:22,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:17:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2080993380, now seen corresponding path program 2 times [2021-12-06 19:17:22,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:17:22,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651009147] [2021-12-06 19:17:22,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:17:22,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:17:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:17:22,878 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:17:22,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 19:17:23,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:17:23,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:17:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 19:17:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:17:23,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:17:23,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:17:23,180 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:17:23,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 19:17:23,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 19:17:23,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:17:23,341 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-12-06 19:17:23,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 19:17:23,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:17:23,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 19:17:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:17:23,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:17:26,191 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 19:17:26,297 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1098))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) is different from false [2021-12-06 19:17:26,636 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:17:26,636 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2021-12-06 19:17:26,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:26,653 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 159 treesize of output 157 [2021-12-06 19:17:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 330 treesize of output 318 [2021-12-06 19:17:26,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2021-12-06 19:17:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-06 19:17:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2021-12-06 19:17:27,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:17:27,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651009147] [2021-12-06 19:17:27,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651009147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:17:27,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:17:27,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-06 19:17:27,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813676476] [2021-12-06 19:17:27,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:17:27,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 19:17:27,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:17:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 19:17:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=202, Unknown=3, NotChecked=58, Total=306 [2021-12-06 19:17:27,142 INFO L87 Difference]: Start difference. First operand 175 states and 199 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:27,494 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (= |c_ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|))) (_ bv1 1))) (forall ((v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1098))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:17:27,687 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (forall ((v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1098))) (store .cse0 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse0 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:17:29,748 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|) |c_ULTIMATE.start_main_~data~0#1.base|)) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32)))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv0 32)) (_ bv0 32))) (= |c_ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (select |c_#valid| |c_ULTIMATE.start_main_~item~0#1.base|))) (_ bv1 1)))) is different from false [2021-12-06 19:17:29,936 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (select .cse3 (_ bv0 32))) (.cse1 (select .cse3 (_ bv4 32)))) (and (= |c_ULTIMATE.start_main_~data~0#1.offset| (_ bv0 32)) (not (= |c_ULTIMATE.start_main_~node~1#1.base| |c_ULTIMATE.start_main_~data~0#1.base|)) (not (= .cse0 (_ bv0 32))) (not (= |c_ULTIMATE.start_main_~node~1#1.base| (_ bv0 32))) (not (= .cse1 .cse0)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~data~0#1.base|) (_ bv4 32))) (not (= (select (select |c_#memory_$Pointer$.base| .cse1) (_ bv0 32)) (_ bv0 32))) (forall ((v_ArrVal_1098 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1098))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|) (_ bv0 32))))))) is different from false [2021-12-06 19:17:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:17:31,318 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2021-12-06 19:17:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:17:31,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 19:17:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:17:31,319 INFO L225 Difference]: With dead ends: 190 [2021-12-06 19:17:31,319 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 19:17:31,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=110, Invalid=413, Unknown=7, NotChecked=282, Total=812 [2021-12-06 19:17:31,320 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 228 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:17:31,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 949 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 286 Invalid, 0 Unknown, 317 Unchecked, 1.3s Time] [2021-12-06 19:17:31,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 19:17:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2021-12-06 19:17:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 167 states have (on average 1.1437125748502994) internal successors, (191), 178 states have internal predecessors, (191), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:17:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-12-06 19:17:31,335 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 46 [2021-12-06 19:17:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:17:31,335 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-12-06 19:17:31,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-12-06 19:17:31,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 19:17:31,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:17:31,336 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:17:31,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 19:17:31,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:17:31,537 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:17:31,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:17:31,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1227467725, now seen corresponding path program 1 times [2021-12-06 19:17:31,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:17:31,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047291540] [2021-12-06 19:17:31,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:17:31,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:17:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:17:31,542 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:17:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 19:17:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:17:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 19:17:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:17:31,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:31,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2021-12-06 19:17:31,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:31,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2021-12-06 19:17:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:17:31,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:17:31,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:17:31,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047291540] [2021-12-06 19:17:31,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047291540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:17:31,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:17:31,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:17:31,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281229495] [2021-12-06 19:17:31,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:17:31,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:17:31,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:17:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:17:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:17:31,986 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:17:32,991 INFO L93 Difference]: Finished difference Result 189 states and 213 transitions. [2021-12-06 19:17:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 19:17:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-06 19:17:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:17:32,992 INFO L225 Difference]: With dead ends: 189 [2021-12-06 19:17:32,992 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 19:17:32,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:17:32,993 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 38 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:17:32,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 520 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 35 Unchecked, 0.8s Time] [2021-12-06 19:17:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 19:17:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-06 19:17:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 147 states have internal predecessors, (159), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:17:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-12-06 19:17:33,006 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 46 [2021-12-06 19:17:33,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:17:33,006 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-12-06 19:17:33,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:17:33,006 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-12-06 19:17:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 19:17:33,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:17:33,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:17:33,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-12-06 19:17:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:17:33,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:17:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:17:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1482148054, now seen corresponding path program 2 times [2021-12-06 19:17:33,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:17:33,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936777379] [2021-12-06 19:17:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:17:33,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:17:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:17:33,212 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:17:33,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 19:17:33,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:17:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:17:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 19:17:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:17:33,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:17:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:33,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:17:33,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:33,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 19:17:33,555 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:17:33,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-12-06 19:17:33,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 25 [2021-12-06 19:17:33,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:17:33,780 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 19:17:33,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2021-12-06 19:17:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2021-12-06 19:17:34,059 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 19:17:34,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 61 [2021-12-06 19:17:34,090 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-12-06 19:17:34,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 19:17:34,269 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 19:17:34,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 54 [2021-12-06 19:17:34,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 47 [2021-12-06 19:17:36,867 INFO L354 Elim1Store]: treesize reduction 137, result has 12.2 percent of original size [2021-12-06 19:17:36,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 20 case distinctions, treesize of input 190 treesize of output 107 [2021-12-06 19:17:36,902 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-12-06 19:17:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 34 [2021-12-06 19:17:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 19:17:36,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:17:40,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.base_37| (_ BitVec 32)) (v_ArrVal_1215 (_ BitVec 1)) (|v_ULTIMATE.start_main_~node~1#1.base_31| (_ BitVec 32)) (v_ArrVal_1216 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1217 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_main_~node~1#1.base_31| v_ArrVal_1217)) (.cse8 (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~node~1#1.base_31| v_ArrVal_1216))) (let ((.cse6 (store (store (select .cse8 |v_ULTIMATE.start_main_~item~0#1.base_37|) (_ bv0 32) (_ bv0 32)) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse7 (store (store (select .cse9 |v_ULTIMATE.start_main_~item~0#1.base_37|) (_ bv0 32) |v_ULTIMATE.start_main_~node~1#1.base_31|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))) (let ((.cse0 (store .cse9 |v_ULTIMATE.start_main_~item~0#1.base_37| .cse7)) (.cse3 (store .cse8 |v_ULTIMATE.start_main_~item~0#1.base_37| .cse6)) (.cse1 (select .cse7 (_ bv0 32))) (.cse2 (select .cse6 (_ bv0 32)))) (or (not (= (select (select .cse0 .cse1) .cse2) (_ bv0 32))) (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_31| v_ArrVal_1215) |v_ULTIMATE.start_main_~item~0#1.base_37|))) (let ((.cse4 (select (select .cse0 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse5 (select (select .cse3 |c_ULTIMATE.start_main_~data~0#1.base|) |c_ULTIMATE.start_main_~data~0#1.offset|))) (and (= (select (select .cse3 .cse4) .cse5) (_ bv0 32)) (= (select (select .cse0 .cse4) .cse5) (_ bv0 32)))) (not (= (select (select .cse3 .cse1) .cse2) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ULTIMATE.start_main_~node~1#1.base_31|))))))))) is different from false [2021-12-06 19:17:51,671 INFO L354 Elim1Store]: treesize reduction 139, result has 31.5 percent of original size [2021-12-06 19:17:51,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 976 treesize of output 669 [2021-12-06 19:17:51,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,388 INFO L354 Elim1Store]: treesize reduction 110, result has 33.3 percent of original size [2021-12-06 19:17:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 606 treesize of output 290 [2021-12-06 19:17:52,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,689 INFO L354 Elim1Store]: treesize reduction 96, result has 37.3 percent of original size [2021-12-06 19:17:52,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 1609 treesize of output 1535 [2021-12-06 19:17:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:52,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:17:52,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:52,790 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 2316 treesize of output 2170 [2021-12-06 19:17:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:52,908 INFO L354 Elim1Store]: treesize reduction 38, result has 37.7 percent of original size [2021-12-06 19:17:52,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3102 treesize of output 2928 [2021-12-06 19:17:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:53,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:53,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 2468 treesize of output 2430 [2021-12-06 19:17:53,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 357 treesize of output 305 [2021-12-06 19:17:54,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1516 treesize of output 1460 [2021-12-06 19:17:54,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1220 treesize of output 1184 [2021-12-06 19:17:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1215 treesize of output 1181 [2021-12-06 19:17:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1221 treesize of output 1185 [2021-12-06 19:17:55,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1259 treesize of output 1223 [2021-12-06 19:17:55,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1221 treesize of output 1185 [2021-12-06 19:17:55,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 907 treesize of output 883 [2021-12-06 19:17:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 913 treesize of output 887 [2021-12-06 19:17:55,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 912 treesize of output 886 [2021-12-06 19:17:56,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-12-06 19:17:56,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 19:17:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 19:17:56,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 19:17:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 270 [2021-12-06 19:17:56,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 200 [2021-12-06 19:17:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:17:57,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 205 [2021-12-06 19:17:57,951 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-12-06 19:17:59,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:17:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 272 treesize of output 256 [2021-12-06 19:18:11,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 106 [2021-12-06 19:18:11,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:18:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 117 [2021-12-06 19:18:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-12-06 19:18:28,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:18:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936777379] [2021-12-06 19:18:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936777379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:18:28,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:18:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-12-06 19:18:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286111923] [2021-12-06 19:18:28,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:18:28,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:18:28,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:18:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:18:28,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=388, Unknown=12, NotChecked=40, Total=506 [2021-12-06 19:18:28,036 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:31,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:18:32,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:32,777 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2021-12-06 19:18:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:18:32,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-06 19:18:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:32,779 INFO L225 Difference]: With dead ends: 156 [2021-12-06 19:18:32,779 INFO L226 Difference]: Without dead ends: 153 [2021-12-06 19:18:32,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=86, Invalid=501, Unknown=17, NotChecked=46, Total=650 [2021-12-06 19:18:32,780 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 30 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:32,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1012 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 242 Unchecked, 3.7s Time] [2021-12-06 19:18:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-06 19:18:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-12-06 19:18:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 150 states have internal predecessors, (162), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:18:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2021-12-06 19:18:32,793 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 49 [2021-12-06 19:18:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:32,793 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2021-12-06 19:18:32,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 23 states have internal predecessors, (87), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2021-12-06 19:18:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 19:18:32,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:32,793 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:18:32,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-06 19:18:32,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:18:32,994 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1611423392, now seen corresponding path program 1 times [2021-12-06 19:18:32,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:18:32,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407594789] [2021-12-06 19:18:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:32,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:18:32,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:18:32,999 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:18:33,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 19:18:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 19:18:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:18:33,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:18:33,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:18:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:18:33,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:18:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:18:33,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:18:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407594789] [2021-12-06 19:18:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407594789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:18:33,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:18:33,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-12-06 19:18:33,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015816961] [2021-12-06 19:18:33,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:18:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:18:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:18:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:18:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:18:33,522 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:34,370 INFO L93 Difference]: Finished difference Result 201 states and 244 transitions. [2021-12-06 19:18:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:18:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 19:18:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:34,372 INFO L225 Difference]: With dead ends: 201 [2021-12-06 19:18:34,372 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 19:18:34,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:18:34,373 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 227 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:34,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 360 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:18:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 19:18:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2021-12-06 19:18:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 137 states have (on average 1.1605839416058394) internal successors, (159), 148 states have internal predecessors, (159), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:18:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-12-06 19:18:34,389 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 53 [2021-12-06 19:18:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:34,389 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-12-06 19:18:34,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-12-06 19:18:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 19:18:34,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:34,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:18:34,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 19:18:34,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:18:34,591 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:34,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -65039893, now seen corresponding path program 2 times [2021-12-06 19:18:34,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:18:34,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000649068] [2021-12-06 19:18:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:18:34,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:18:34,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:18:34,596 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:18:34,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 19:18:34,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:18:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:18:34,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:18:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:18:34,880 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 31 treesize of output 19 [2021-12-06 19:18:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 19:18:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:18:34,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:18:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 19:18:35,082 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:18:35,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000649068] [2021-12-06 19:18:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000649068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:18:35,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:18:35,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-06 19:18:35,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583055835] [2021-12-06 19:18:35,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:18:35,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:18:35,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:18:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:18:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:18:35,083 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:36,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:36,295 INFO L93 Difference]: Finished difference Result 153 states and 174 transitions. [2021-12-06 19:18:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:18:36,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 19:18:36,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:36,296 INFO L225 Difference]: With dead ends: 153 [2021-12-06 19:18:36,296 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 19:18:36,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:18:36,297 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 84 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:36,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 275 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:18:36,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 19:18:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-12-06 19:18:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.145985401459854) internal successors, (157), 146 states have internal predecessors, (157), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:18:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-12-06 19:18:36,309 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 54 [2021-12-06 19:18:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:36,309 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-12-06 19:18:36,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-12-06 19:18:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:18:36,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:36,310 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:18:36,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 19:18:36,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:18:36,511 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:36,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:36,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1583045512, now seen corresponding path program 1 times [2021-12-06 19:18:36,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:18:36,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738689359] [2021-12-06 19:18:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:36,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:18:36,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:18:36,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:18:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 19:18:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:36,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:18:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:18:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 19:18:36,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:18:36,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:18:36,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738689359] [2021-12-06 19:18:36,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738689359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:18:36,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:18:36,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:18:36,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017639800] [2021-12-06 19:18:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:18:36,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:18:36,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:18:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:18:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:18:36,828 INFO L87 Difference]: Start difference. First operand 149 states and 169 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:37,254 INFO L93 Difference]: Finished difference Result 241 states and 296 transitions. [2021-12-06 19:18:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:18:37,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-06 19:18:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:37,255 INFO L225 Difference]: With dead ends: 241 [2021-12-06 19:18:37,255 INFO L226 Difference]: Without dead ends: 200 [2021-12-06 19:18:37,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:18:37,256 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 206 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:37,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 282 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:18:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-06 19:18:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-12-06 19:18:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.144927536231884) internal successors, (158), 147 states have internal predecessors, (158), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:18:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-12-06 19:18:37,270 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 55 [2021-12-06 19:18:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:37,271 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-12-06 19:18:37,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:37,271 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-12-06 19:18:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 19:18:37,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:37,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:18:37,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 19:18:37,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:18:37,472 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:37,473 INFO L85 PathProgramCache]: Analyzing trace with hash 687864775, now seen corresponding path program 1 times [2021-12-06 19:18:37,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:18:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317702677] [2021-12-06 19:18:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:18:37,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:18:37,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:18:37,477 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:18:37,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 19:18:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:18:37,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:18:37,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:18:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:18:38,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 19:18:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:18:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:18:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:18:38,211 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:18:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317702677] [2021-12-06 19:18:38,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317702677] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:18:38,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:18:38,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-06 19:18:38,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703298326] [2021-12-06 19:18:38,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:18:38,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:18:38,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:18:38,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:18:38,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:18:38,212 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:18:39,720 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2021-12-06 19:18:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:18:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-06 19:18:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:18:39,722 INFO L225 Difference]: With dead ends: 253 [2021-12-06 19:18:39,722 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 19:18:39,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 19:18:39,723 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 388 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:18:39,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 423 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:18:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 19:18:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 151. [2021-12-06 19:18:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.143884892086331) internal successors, (159), 148 states have internal predecessors, (159), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:18:39,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2021-12-06 19:18:39,738 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 56 [2021-12-06 19:18:39,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:18:39,738 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2021-12-06 19:18:39,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:18:39,738 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2021-12-06 19:18:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 19:18:39,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:18:39,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:18:39,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-06 19:18:39,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:18:39,939 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:18:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:18:39,940 INFO L85 PathProgramCache]: Analyzing trace with hash -959165000, now seen corresponding path program 2 times [2021-12-06 19:18:39,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:18:39,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882786173] [2021-12-06 19:18:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:18:39,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:18:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:18:39,941 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:18:39,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a2fd3f2-7958-4c75-a816-9cb2d40f3dbc/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 19:18:40,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:18:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:18:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 19:18:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:18:40,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:18:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:18:40,300 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 19:18:40,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-06 19:18:40,427 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 19:18:40,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 48 [2021-12-06 19:18:40,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 19:18:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 26 [2021-12-06 19:18:40,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2021-12-06 19:18:40,787 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 19:18:40,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2021-12-06 19:18:40,962 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-12-06 19:18:40,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 65 [2021-12-06 19:18:41,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:18:41,305 INFO L354 Elim1Store]: treesize reduction 44, result has 43.6 percent of original size [2021-12-06 19:18:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 79 [2021-12-06 19:18:41,341 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-12-06 19:18:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-12-06 19:18:58,299 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-12-06 19:18:58,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 31 [2021-12-06 19:19:04,290 INFO L354 Elim1Store]: treesize reduction 24, result has 67.1 percent of original size [2021-12-06 19:19:04,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 139 treesize of output 101 [2021-12-06 19:19:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:19:04,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:19:07,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32)) (v_ArrVal_1540 (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~item~0#1.offset|))) (let ((.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_~node~1#1.base|) .cse2 |c_ULTIMATE.start_main_~data~0#1.base|)))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~data~0#1.base|) .cse3)))) (.cse1 (select (select (store |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| v_ArrVal_1540) .cse2 |c_ULTIMATE.start_main_~data~0#1.offset|)) |c_ULTIMATE.start_main_~data~0#1.base|) .cse3))) (or (not (= (select .cse0 (bvadd (_ bv4 32) .cse1)) (_ bv0 32))) (not (= (select .cse0 .cse1) (_ bv0 32))))))) is different from false [2021-12-06 19:19:07,315 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1539 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1538 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~item~0#1.base| (_ BitVec 32)) (v_ArrVal_1540 (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) (let ((.cse0 (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1539))) (store .cse5 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse5 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) |c_ULTIMATE.start_main_~node~1#1.base|) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.base|))))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~data~0#1.base|) .cse3)))) (.cse1 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1538))) (store .cse2 |ULTIMATE.start_main_~item~0#1.base| (store (store (select .cse2 |ULTIMATE.start_main_~item~0#1.base|) (_ bv0 32) v_ArrVal_1540) (_ bv4 32) |c_ULTIMATE.start_main_~data~0#1.offset|))) |c_ULTIMATE.start_main_~data~0#1.base|) .cse3))) (or (not (= (select .cse0 (bvadd (_ bv4 32) .cse1)) (_ bv0 32))) (not (= (select .cse0 .cse1) (_ bv0 32))))))) is different from false [2021-12-06 19:19:07,985 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:19:07,985 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 267 [2021-12-06 19:19:08,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:19:08,078 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 1895 treesize of output 1885 [2021-12-06 19:19:08,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5081 treesize of output 5033 [2021-12-06 19:19:11,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:19:11,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 416 treesize of output 356 [2021-12-06 19:19:13,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 560 treesize of output 556 [2021-12-06 19:19:14,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2630 treesize of output 2594 [2021-12-06 19:19:41,807 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:19:41,807 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 669 treesize of output 376 [2021-12-06 19:19:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:19:41,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:19:41,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:19:41,990 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 3576480 treesize of output 3470804