./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg --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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg --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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:52:58,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:52:58,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:52:58,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:52:58,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:52:58,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:52:58,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:52:58,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:52:58,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:52:58,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:52:58,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:52:58,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:52:58,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:52:58,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:52:58,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:52:58,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:52:58,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:52:58,411 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:52:58,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:52:58,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:52:58,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:52:58,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:52:58,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:52:58,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:52:58,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:52:58,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:52:58,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:52:58,430 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:52:58,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:52:58,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:52:58,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:52:58,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:52:58,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:52:58,436 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:52:58,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:52:58,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:52:58,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:52:58,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:52:58,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:52:58,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:52:58,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:52:58,443 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 08:52:58,486 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:52:58,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:52:58,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:52:58,487 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:52:58,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:52:58,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:52:58,489 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:52:58,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:52:58,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:52:58,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:52:58,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:52:58,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:52:58,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 08:52:58,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:52:58,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 08:52:58,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:52:58,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 08:52:58,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:52:58,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 08:52:58,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:52:58,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:52:58,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:52:58,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:58,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:52:58,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:52:58,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 08:52:58,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:52:58,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:52:58,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 08:52:58,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 08:52:58,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 08:52:58,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:52:58,495 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_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-10-28 08:52:58,779 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:52:58,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:52:58,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:52:58,809 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:52:58,810 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:52:58,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-28 08:52:58,902 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/8d6d3c2f0/3ed02d0a71104bd3afe8b7282254c856/FLAG9a7cfc5c4 [2021-10-28 08:52:59,532 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:52:59,533 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-28 08:52:59,541 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/8d6d3c2f0/3ed02d0a71104bd3afe8b7282254c856/FLAG9a7cfc5c4 [2021-10-28 08:52:59,863 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/8d6d3c2f0/3ed02d0a71104bd3afe8b7282254c856 [2021-10-28 08:52:59,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:52:59,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:52:59,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:59,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:52:59,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:52:59,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:59" (1/1) ... [2021-10-28 08:52:59,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd35fa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:59, skipping insertion in model container [2021-10-28 08:52:59,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:59" (1/1) ... [2021-10-28 08:52:59,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:52:59,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:53:00,198 WARN L228 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_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-28 08:53:00,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:53:00,217 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:53:00,263 WARN L228 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_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-28 08:53:00,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:53:00,280 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:53:00,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00 WrapperNode [2021-10-28 08:53:00,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:53:00,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:53:00,283 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:53:00,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:53:00,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,301 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:53:00,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:53:00,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:53:00,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:53:00,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:53:00,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:53:00,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:53:00,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:53:00,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (1/1) ... [2021-10-28 08:53:00,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:53:00,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:53:00,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:53:00,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:53:00,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:53:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:53:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:53:00,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:53:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:53:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:53:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:53:00,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:53:00,941 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-28 08:53:00,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:00 BoogieIcfgContainer [2021-10-28 08:53:00,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:53:00,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:53:00,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:53:00,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:53:00,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:52:59" (1/3) ... [2021-10-28 08:53:00,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd40abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:53:00, skipping insertion in model container [2021-10-28 08:53:00,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:00" (2/3) ... [2021-10-28 08:53:00,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bd40abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:53:00, skipping insertion in model container [2021-10-28 08:53:00,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:00" (3/3) ... [2021-10-28 08:53:00,955 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-28 08:53:00,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:53:00,974 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:53:01,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:53:01,049 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 [2021-10-28 08:53:01,049 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:53:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:53:01,074 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:01,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:01,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-10-28 08:53:01,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:01,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28771182] [2021-10-28 08:53:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:01,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:01,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:01,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:01,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28771182] [2021-10-28 08:53:01,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28771182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:01,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:01,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 08:53:01,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566006210] [2021-10-28 08:53:01,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:53:01,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:53:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:53:01,311 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:01,329 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-10-28 08:53:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:53:01,330 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:53:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:01,340 INFO L225 Difference]: With dead ends: 53 [2021-10-28 08:53:01,340 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 08:53:01,343 INFO L786 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 [2021-10-28 08:53:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 08:53:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 08:53:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-28 08:53:01,380 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-10-28 08:53:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:01,381 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-28 08:53:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-28 08:53:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:53:01,383 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:01,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:01,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:53:01,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:01,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-10-28 08:53:01,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:01,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266559108] [2021-10-28 08:53:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:01,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:01,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:01,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266559108] [2021-10-28 08:53:01,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266559108] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:01,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:01,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:53:01,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094317434] [2021-10-28 08:53:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:53:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:53:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:53:01,504 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:01,545 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-28 08:53:01,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:53:01,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:53:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:01,547 INFO L225 Difference]: With dead ends: 45 [2021-10-28 08:53:01,547 INFO L226 Difference]: Without dead ends: 26 [2021-10-28 08:53:01,548 INFO L786 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 [2021-10-28 08:53:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-28 08:53:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-28 08:53:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-10-28 08:53:01,555 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-10-28 08:53:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:01,555 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-10-28 08:53:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-10-28 08:53:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 08:53:01,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:01,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:53:01,557 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2143387046, now seen corresponding path program 1 times [2021-10-28 08:53:01,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:01,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684602384] [2021-10-28 08:53:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:01,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:53:01,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:01,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684602384] [2021-10-28 08:53:01,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684602384] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:01,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:01,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:53:01,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665246761] [2021-10-28 08:53:01,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:53:01,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:53:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:01,692 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:01,811 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-10-28 08:53:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:53:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 08:53:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:01,813 INFO L225 Difference]: With dead ends: 47 [2021-10-28 08:53:01,813 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 08:53:01,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:01,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 08:53:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-10-28 08:53:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-28 08:53:01,834 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-10-28 08:53:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:01,835 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-28 08:53:01,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-28 08:53:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:53:01,837 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:01,838 INFO L513 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] [2021-10-28 08:53:01,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:53:01,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash 46775620, now seen corresponding path program 1 times [2021-10-28 08:53:01,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:01,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066635411] [2021-10-28 08:53:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:01,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:53:01,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:01,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066635411] [2021-10-28 08:53:01,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066635411] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:01,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:01,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:53:01,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835565975] [2021-10-28 08:53:01,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:53:01,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:53:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:01,976 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:02,040 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-10-28 08:53:02,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:53:02,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 08:53:02,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:02,042 INFO L225 Difference]: With dead ends: 39 [2021-10-28 08:53:02,042 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 08:53:02,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:02,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 08:53:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-10-28 08:53:02,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-28 08:53:02,062 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-10-28 08:53:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:02,063 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-28 08:53:02,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,064 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-28 08:53:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:53:02,065 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:02,065 INFO L513 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] [2021-10-28 08:53:02,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:53:02,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:02,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash -548779230, now seen corresponding path program 1 times [2021-10-28 08:53:02,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:02,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508396881] [2021-10-28 08:53:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:02,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:53:02,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:53:02,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508396881] [2021-10-28 08:53:02,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508396881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:53:02,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702435289] [2021-10-28 08:53:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:02,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:53:02,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:53:02,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:53:02,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:53:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 08:53:02,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:53:02,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702435289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:53:02,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:53:02,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-28 08:53:02,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645567508] [2021-10-28 08:53:02,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:53:02,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:53:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:53:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:53:02,650 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:02,733 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-10-28 08:53:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:53:02,734 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 08:53:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:02,735 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:53:02,735 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:53:02,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:53:02,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:53:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-10-28 08:53:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-28 08:53:02,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-10-28 08:53:02,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:02,744 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-28 08:53:02,745 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-28 08:53:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:53:02,746 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:02,747 INFO L513 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] [2021-10-28 08:53:02,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:02,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:53:02,975 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 2 times [2021-10-28 08:53:02,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:53:02,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803811617] [2021-10-28 08:53:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:02,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:53:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:53:03,078 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:53:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:53:03,253 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:53:03,253 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:53:03,255 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:53:03,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:53:03,262 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2021-10-28 08:53:03,265 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:53:03,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:53:03 BoogieIcfgContainer [2021-10-28 08:53:03,347 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:53:03,352 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:53:03,352 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:53:03,353 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:53:03,353 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:00" (3/4) ... [2021-10-28 08:53:03,356 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:53:03,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:53:03,358 INFO L168 Benchmark]: Toolchain (without parser) took 3489.14 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 64.4 MB in the beginning and 83.0 MB in the end (delta: -18.7 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:03,359 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:03,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 411.72 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 64.1 MB in the beginning and 94.0 MB in the end (delta: -29.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:03,361 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.97 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 91.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:03,361 INFO L168 Benchmark]: Boogie Preprocessor took 64.89 ms. Allocated memory is still 117.4 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:03,362 INFO L168 Benchmark]: RCFGBuilder took 537.28 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 78.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:03,363 INFO L168 Benchmark]: TraceAbstraction took 2405.12 ms. Allocated memory is still 117.4 MB. Free memory was 78.5 MB in the beginning and 83.7 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:03,364 INFO L168 Benchmark]: Witness Printer took 4.09 ms. Allocated memory is still 117.4 MB. Free memory was 83.7 MB in the beginning and 83.0 MB in the end (delta: 704.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:03,369 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 49.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 411.72 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 64.1 MB in the beginning and 94.0 MB in the end (delta: -29.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.97 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 91.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.89 ms. Allocated memory is still 117.4 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.28 ms. Allocated memory is still 117.4 MB. Free memory was 90.6 MB in the beginning and 78.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2405.12 ms. Allocated memory is still 117.4 MB. Free memory was 78.5 MB in the beginning and 83.7 MB in the end (delta: -5.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.09 ms. Allocated memory is still 117.4 MB. Free memory was 83.7 MB in the beginning and 83.0 MB in the end (delta: 704.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND FALSE !(i < N) VAL [N=2] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg 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 -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2021-10-28 08:53:07,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:53:07,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:53:07,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:53:07,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:53:07,442 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:53:07,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-28 08:53:07,533 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/55f92da0b/3aa34bfcb161437994b8d124f1c75642/FLAGa5abcdb67 [2021-10-28 08:53:08,221 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:53:08,222 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-28 08:53:08,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/55f92da0b/3aa34bfcb161437994b8d124f1c75642/FLAGa5abcdb67 [2021-10-28 08:53:08,591 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/data/55f92da0b/3aa34bfcb161437994b8d124f1c75642 [2021-10-28 08:53:08,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:53:08,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 08:53:08,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:53:08,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:53:08,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:53:08,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:08,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cffacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08, skipping insertion in model container [2021-10-28 08:53:08,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:08,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:53:08,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:53:08,844 WARN L228 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_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-28 08:53:08,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:53:08,864 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:53:08,929 WARN L228 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_b1212b00-22bc-41db-98b4-bb8c9e697e12/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-28 08:53:08,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:53:08,984 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:53:08,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08 WrapperNode [2021-10-28 08:53:08,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:53:08,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 08:53:08,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 08:53:08,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 08:53:08,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 08:53:09,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:53:09,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:53:09,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:53:09,052 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:53:09,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:53:09,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:53:09,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:53:09,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (1/1) ... [2021-10-28 08:53:09,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:53:09,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:53:09,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:53:09,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:53:09,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:53:09,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:53:09,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 08:53:09,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:53:09,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:53:09,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:53:09,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 08:53:09,709 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:53:09,709 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-28 08:53:09,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:09 BoogieIcfgContainer [2021-10-28 08:53:09,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:53:09,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:53:09,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:53:09,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:53:09,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:53:08" (1/3) ... [2021-10-28 08:53:09,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6f33f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:53:09, skipping insertion in model container [2021-10-28 08:53:09,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:53:08" (2/3) ... [2021-10-28 08:53:09,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c6f33f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:53:09, skipping insertion in model container [2021-10-28 08:53:09,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:09" (3/3) ... [2021-10-28 08:53:09,724 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-28 08:53:09,742 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:53:09,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 08:53:09,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:53:09,874 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 [2021-10-28 08:53:09,874 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 08:53:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:09,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:53:09,914 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:09,915 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:09,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:09,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-10-28 08:53:09,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:09,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824442818] [2021-10-28 08:53:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:09,953 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:09,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:09,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:53:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 08:53:10,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:10,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:10,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:10,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824442818] [2021-10-28 08:53:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824442818] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:10,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:10,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:53:10,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707332821] [2021-10-28 08:53:10,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 08:53:10,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:53:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 08:53:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:53:10,429 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:10,450 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-10-28 08:53:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 08:53:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:53:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:10,462 INFO L225 Difference]: With dead ends: 53 [2021-10-28 08:53:10,463 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 08:53:10,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 08:53:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 08:53:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 08:53:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-28 08:53:10,511 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-10-28 08:53:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:10,511 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-28 08:53:10,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-28 08:53:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:53:10,513 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:10,514 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:10,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:10,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:10,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-10-28 08:53:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:10,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139112197] [2021-10-28 08:53:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:10,732 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:10,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:10,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:10,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:53:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:53:10,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:11,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:11,097 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:11,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139112197] [2021-10-28 08:53:11,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139112197] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:53:11,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:11,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 08:53:11,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630917499] [2021-10-28 08:53:11,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:53:11,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:53:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:53:11,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:11,104 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:11,195 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-28 08:53:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:53:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 08:53:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:11,198 INFO L225 Difference]: With dead ends: 46 [2021-10-28 08:53:11,198 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 08:53:11,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:53:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 08:53:11,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 08:53:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-28 08:53:11,207 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-10-28 08:53:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:11,208 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-28 08:53:11,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:11,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-28 08:53:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 08:53:11,210 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:11,210 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:53:11,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:11,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:11,425 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:11,426 INFO L85 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-10-28 08:53:11,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:11,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077546682] [2021-10-28 08:53:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:11,428 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:11,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:11,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:11,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 08:53:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:53:11,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:11,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:12,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:12,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077546682] [2021-10-28 08:53:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077546682] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:53:12,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:53:12,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-28 08:53:12,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528885693] [2021-10-28 08:53:12,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:53:12,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:53:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:53:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:53:12,269 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:12,776 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-10-28 08:53:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:53:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-28 08:53:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:12,781 INFO L225 Difference]: With dead ends: 74 [2021-10-28 08:53:12,782 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 08:53:12,783 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:53:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 08:53:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2021-10-28 08:53:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-28 08:53:12,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-10-28 08:53:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:12,808 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-28 08:53:12,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-28 08:53:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 08:53:12,812 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:12,812 INFO L513 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] [2021-10-28 08:53:12,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:13,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:13,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-10-28 08:53:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:13,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022090892] [2021-10-28 08:53:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:13,031 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:13,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:13,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 08:53:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:13,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 08:53:13,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:53:13,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 08:53:14,114 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:14,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022090892] [2021-10-28 08:53:14,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022090892] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 08:53:14,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:53:14,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-28 08:53:14,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603329104] [2021-10-28 08:53:14,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 08:53:14,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:53:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 08:53:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:53:14,123 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:53:14,548 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-10-28 08:53:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:53:14,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-28 08:53:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:53:14,551 INFO L225 Difference]: With dead ends: 67 [2021-10-28 08:53:14,551 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 08:53:14,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-10-28 08:53:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 08:53:14,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-10-28 08:53:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:14,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-28 08:53:14,561 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-10-28 08:53:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:53:14,561 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-28 08:53:14,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 08:53:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-28 08:53:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 08:53:14,563 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:53:14,564 INFO L513 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] [2021-10-28 08:53:14,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:14,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:14,779 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 08:53:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:53:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-10-28 08:53:14,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:53:14,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785309530] [2021-10-28 08:53:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:14,781 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:53:14,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:53:14,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:53:14,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 08:53:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:15,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 08:53:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:15,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:15,792 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-28 08:53:16,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:16,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:53:16,489 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-28 08:53:16,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:16,815 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-28 08:53:16,816 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-28 08:53:17,064 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-28 08:53:17,065 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 63 treesize of output 34 [2021-10-28 08:53:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:17,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:29,640 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 143 treesize of output 111 [2021-10-28 08:53:29,653 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:53:29,654 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 212 treesize of output 156 [2021-10-28 08:53:29,710 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 49 treesize of output 37 [2021-10-28 08:53:29,725 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:53:29,726 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 62 treesize of output 1 [2021-10-28 08:53:30,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:53:30,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785309530] [2021-10-28 08:53:30,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-28 08:53:30,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845499354] [2021-10-28 08:53:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:30,579 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-28 08:53:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/cvc4 [2021-10-28 08:53:30,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-28 08:53:30,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-28 08:53:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:31,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 08:53:31,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:31,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-28 08:53:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:31,402 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-28 08:53:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:31,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:53:31,691 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-28 08:53:31,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:31,945 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-28 08:53:31,945 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-28 08:53:32,038 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-28 08:53:32,038 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 63 treesize of output 34 [2021-10-28 08:53:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:53:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:40,986 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 255 treesize of output 223 [2021-10-28 08:53:41,022 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:53:41,023 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 755 treesize of output 623 [2021-10-28 08:53:42,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-28 08:53:42,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136944495] [2021-10-28 08:53:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:53:42,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:53:42,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:53:42,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:53:42,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:53:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:53:43,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 08:53:43,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:53:44,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:44,803 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-28 08:53:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:45,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 08:53:45,075 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-28 08:53:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 08:53:45,326 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-28 08:53:45,327 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-28 08:53:45,416 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-28 08:53:45,416 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 63 treesize of output 34 [2021-10-28 08:53:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 08:53:46,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:53:54,499 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 143 treesize of output 111 [2021-10-28 08:53:54,509 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:53:54,510 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 212 treesize of output 156 [2021-10-28 08:53:54,558 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 49 treesize of output 37 [2021-10-28 08:53:54,564 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-28 08:53:54,564 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 62 treesize of output 1 [2021-10-28 08:53:54,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-28 08:53:54,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:53:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-28 08:53:54,839 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-28 08:53:54,839 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-10-28 08:53:54,848 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 08:53:54,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-28 08:53:55,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:53:55,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-28 08:53:55,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1212b00-22bc-41db-98b4-bb8c9e697e12/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:53:55,460 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-10-28 08:53:55,464 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:53:55,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:53:55 BoogieIcfgContainer [2021-10-28 08:53:55,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:53:55,503 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:53:55,503 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:53:55,504 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:53:55,504 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:53:09" (3/4) ... [2021-10-28 08:53:55,508 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:53:55,509 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:53:55,510 INFO L168 Benchmark]: Toolchain (without parser) took 46912.91 ms. Allocated memory was 77.6 MB in the beginning and 102.8 MB in the end (delta: 25.2 MB). Free memory was 54.3 MB in the beginning and 47.2 MB in the end (delta: 7.1 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:55,510 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:55,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.29 ms. Allocated memory is still 77.6 MB. Free memory was 54.1 MB in the beginning and 60.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:55,511 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.24 ms. Allocated memory is still 77.6 MB. Free memory was 60.3 MB in the beginning and 58.3 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:55,512 INFO L168 Benchmark]: Boogie Preprocessor took 53.07 ms. Allocated memory is still 77.6 MB. Free memory was 58.3 MB in the beginning and 56.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:55,513 INFO L168 Benchmark]: RCFGBuilder took 617.81 ms. Allocated memory is still 77.6 MB. Free memory was 56.9 MB in the beginning and 44.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:55,513 INFO L168 Benchmark]: TraceAbstraction took 45787.46 ms. Allocated memory was 77.6 MB in the beginning and 102.8 MB in the end (delta: 25.2 MB). Free memory was 44.3 MB in the beginning and 47.2 MB in the end (delta: -2.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. [2021-10-28 08:53:55,514 INFO L168 Benchmark]: Witness Printer took 5.64 ms. Allocated memory is still 102.8 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:53:55,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 52.4 MB. Free memory is still 32.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 388.29 ms. Allocated memory is still 77.6 MB. Free memory was 54.1 MB in the beginning and 60.3 MB in the end (delta: -6.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.24 ms. Allocated memory is still 77.6 MB. Free memory was 60.3 MB in the beginning and 58.3 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.07 ms. Allocated memory is still 77.6 MB. Free memory was 58.3 MB in the beginning and 56.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 617.81 ms. Allocated memory is still 77.6 MB. Free memory was 56.9 MB in the beginning and 44.6 MB in the end (delta: 12.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45787.46 ms. Allocated memory was 77.6 MB in the beginning and 102.8 MB in the end (delta: 25.2 MB). Free memory was 44.3 MB in the beginning and 47.2 MB in the end (delta: -2.9 MB). Peak memory consumption was 26.0 MB. Max. memory is 16.1 GB. * Witness Printer took 5.64 ms. Allocated memory is still 102.8 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i