./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer --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 8d8f817036215afe0570c141fddfde907924f85b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:33:11,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:33:11,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:33:11,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:33:11,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:33:11,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:33:11,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:33:11,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:33:11,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:33:11,959 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:33:11,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:33:11,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:33:11,963 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:33:11,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:33:11,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:33:11,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:33:11,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:33:11,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:33:11,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:33:11,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:33:11,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:33:11,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:33:11,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:33:11,987 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:33:11,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:33:11,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:33:11,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:33:11,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:33:11,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:33:11,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:33:11,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:33:11,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:33:11,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:33:12,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:33:12,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:33:12,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:33:12,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:33:12,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:33:12,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:33:12,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:33:12,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:33:12,018 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 18:33:12,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:33:12,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:33:12,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:33:12,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:33:12,064 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:33:12,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:33:12,065 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:33:12,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:33:12,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:33:12,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:33:12,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:33:12,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:33:12,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:33:12,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:33:12,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:33:12,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:33:12,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:33:12,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:33:12,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:33:12,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:33:12,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 18:33:12,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:33:12,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:33:12,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:33:12,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:33:12,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:33:12,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:33:12,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:33:12,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:33:12,071 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-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8f817036215afe0570c141fddfde907924f85b [2020-11-29 18:33:12,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:33:12,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:33:12,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:33:12,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:33:12,436 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:33:12,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/../../sv-benchmarks/c/list-properties/list_flag-1.i [2020-11-29 18:33:12,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/data/71fa45521/6ffa998b578e4cfca8f584c21a59b721/FLAG4d0431a2c [2020-11-29 18:33:13,137 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:33:13,138 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/sv-benchmarks/c/list-properties/list_flag-1.i [2020-11-29 18:33:13,174 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/data/71fa45521/6ffa998b578e4cfca8f584c21a59b721/FLAG4d0431a2c [2020-11-29 18:33:13,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/data/71fa45521/6ffa998b578e4cfca8f584c21a59b721 [2020-11-29 18:33:13,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:33:13,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:33:13,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:33:13,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:33:13,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:33:13,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:33:13" (1/1) ... [2020-11-29 18:33:13,411 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3497d87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:13, skipping insertion in model container [2020-11-29 18:33:13,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:33:13" (1/1) ... [2020-11-29 18:33:13,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:33:13,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:33:13,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:33:13,879 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:33:13,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:33:14,010 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:33:14,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14 WrapperNode [2020-11-29 18:33:14,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:33:14,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:33:14,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:33:14,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:33:14,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:33:14,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:33:14,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:33:14,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:33:14,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... [2020-11-29 18:33:14,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:33:14,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:33:14,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:33:14,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:33:14,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 18:33:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:33:14,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:33:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:33:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 18:33:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:33:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 18:33:14,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:33:14,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:33:14,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:33:14,606 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:33:14,606 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 18:33:14,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:33:14 BoogieIcfgContainer [2020-11-29 18:33:14,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:33:14,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 18:33:14,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 18:33:14,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 18:33:14,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:33:13" (1/3) ... [2020-11-29 18:33:14,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b85d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:33:14, skipping insertion in model container [2020-11-29 18:33:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:33:14" (2/3) ... [2020-11-29 18:33:14,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34b85d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:33:14, skipping insertion in model container [2020-11-29 18:33:14,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:33:14" (3/3) ... [2020-11-29 18:33:14,617 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-11-29 18:33:14,628 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 18:33:14,633 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 18:33:14,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 18:33:14,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 18:33:14,669 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 18:33:14,669 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 18:33:14,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:33:14,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:33:14,669 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 18:33:14,669 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:33:14,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 18:33:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-29 18:33:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 18:33:14,691 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:14,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:14,692 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:14,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1518085449, now seen corresponding path program 1 times [2020-11-29 18:33:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:14,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874937295] [2020-11-29 18:33:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:33:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:33:14,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874937295] [2020-11-29 18:33:14,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:33:14,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 18:33:14,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056474376] [2020-11-29 18:33:14,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 18:33:14,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:33:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 18:33:14,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 18:33:14,882 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-29 18:33:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:33:14,898 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-11-29 18:33:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 18:33:14,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 18:33:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:33:14,908 INFO L225 Difference]: With dead ends: 43 [2020-11-29 18:33:14,908 INFO L226 Difference]: Without dead ends: 22 [2020-11-29 18:33:14,911 INFO L677 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 [2020-11-29 18:33:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-29 18:33:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-29 18:33:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 18:33:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-29 18:33:14,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-11-29 18:33:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:33:14,944 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-29 18:33:14,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 18:33:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-29 18:33:14,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 18:33:14,945 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:14,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:14,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 18:33:14,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1194268909, now seen corresponding path program 1 times [2020-11-29 18:33:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218742426] [2020-11-29 18:33:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:33:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:33:15,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218742426] [2020-11-29 18:33:15,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:33:15,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:33:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640733217] [2020-11-29 18:33:15,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:33:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:33:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:33:15,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:33:15,089 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-11-29 18:33:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:33:15,252 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-11-29 18:33:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:33:15,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-29 18:33:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:33:15,255 INFO L225 Difference]: With dead ends: 50 [2020-11-29 18:33:15,255 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 18:33:15,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:33:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 18:33:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-11-29 18:33:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 18:33:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-11-29 18:33:15,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-11-29 18:33:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:33:15,270 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-11-29 18:33:15,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:33:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-11-29 18:33:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 18:33:15,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:15,274 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:15,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 18:33:15,275 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash 466716680, now seen corresponding path program 1 times [2020-11-29 18:33:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:15,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284916376] [2020-11-29 18:33:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:33:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:33:15,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284916376] [2020-11-29 18:33:15,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:33:15,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:33:15,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935126962] [2020-11-29 18:33:15,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:33:15,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:33:15,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:33:15,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:33:15,381 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-11-29 18:33:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:33:15,521 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-11-29 18:33:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:33:15,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-29 18:33:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:33:15,524 INFO L225 Difference]: With dead ends: 52 [2020-11-29 18:33:15,524 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 18:33:15,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:33:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 18:33:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-11-29 18:33:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 18:33:15,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-29 18:33:15,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2020-11-29 18:33:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:33:15,538 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-29 18:33:15,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:33:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-29 18:33:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 18:33:15,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:15,541 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:15,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 18:33:15,542 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:15,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -767976713, now seen corresponding path program 1 times [2020-11-29 18:33:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:15,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614401311] [2020-11-29 18:33:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:33:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:33:15,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614401311] [2020-11-29 18:33:15,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:33:15,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:33:15,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899225242] [2020-11-29 18:33:15,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 18:33:15,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:33:15,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:33:15,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:33:15,626 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-11-29 18:33:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:33:15,744 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-11-29 18:33:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:33:15,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-29 18:33:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:33:15,748 INFO L225 Difference]: With dead ends: 50 [2020-11-29 18:33:15,748 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 18:33:15,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:33:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 18:33:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-11-29 18:33:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:33:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-29 18:33:15,752 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-11-29 18:33:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:33:15,753 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-29 18:33:15,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 18:33:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-29 18:33:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 18:33:15,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:15,754 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:15,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 18:33:15,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:15,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1548345954, now seen corresponding path program 1 times [2020-11-29 18:33:15,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:15,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119631209] [2020-11-29 18:33:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:33:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:33:15,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119631209] [2020-11-29 18:33:15,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:33:15,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:33:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52108559] [2020-11-29 18:33:15,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 18:33:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:33:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:33:15,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:33:15,822 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-11-29 18:33:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:33:15,838 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-11-29 18:33:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:33:15,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-29 18:33:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 18:33:15,839 INFO L225 Difference]: With dead ends: 56 [2020-11-29 18:33:15,839 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 18:33:15,840 INFO L677 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 [2020-11-29 18:33:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 18:33:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-11-29 18:33:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 18:33:15,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-11-29 18:33:15,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-11-29 18:33:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 18:33:15,844 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-11-29 18:33:15,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 18:33:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-11-29 18:33:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 18:33:15,845 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 18:33:15,846 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:33:15,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 18:33:15,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 18:33:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:33:15,846 INFO L82 PathProgramCache]: Analyzing trace with hash 318904113, now seen corresponding path program 1 times [2020-11-29 18:33:15,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:33:15,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806162228] [2020-11-29 18:33:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:33:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:33:15,909 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:33:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:33:15,942 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:33:15,985 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:33:15,986 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 18:33:15,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 18:33:16,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 06:33:16 BoogieIcfgContainer [2020-11-29 18:33:16,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 18:33:16,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:33:16,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:33:16,037 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:33:16,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:33:14" (3/4) ... [2020-11-29 18:33:16,040 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:33:16,097 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_66c51a8f-85bc-431b-8e06-e20ec17a126a/bin/uautomizer/witness.graphml [2020-11-29 18:33:16,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:33:16,100 INFO L168 Benchmark]: Toolchain (without parser) took 2699.87 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 63.8 MB in the beginning and 64.6 MB in the end (delta: -794.1 kB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:33:16,101 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:33:16,101 INFO L168 Benchmark]: CACSL2BoogieTranslator took 610.37 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 60.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:33:16,102 INFO L168 Benchmark]: Boogie Procedure Inliner took 78.30 ms. Allocated memory is still 94.4 MB. Free memory was 60.1 MB in the beginning and 58.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:33:16,103 INFO L168 Benchmark]: Boogie Preprocessor took 46.50 ms. Allocated memory is still 94.4 MB. Free memory was 58.0 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:33:16,104 INFO L168 Benchmark]: RCFGBuilder took 467.84 ms. Allocated memory is still 94.4 MB. Free memory was 56.5 MB in the beginning and 38.6 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-29 18:33:16,105 INFO L168 Benchmark]: TraceAbstraction took 1426.83 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 38.1 MB in the beginning and 67.5 MB in the end (delta: -29.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:33:16,105 INFO L168 Benchmark]: Witness Printer took 60.72 ms. Allocated memory is still 119.5 MB. Free memory was 67.5 MB in the beginning and 64.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:33:16,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 53.4 MB in the beginning and 53.3 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 610.37 ms. Allocated memory is still 94.4 MB. Free memory was 63.5 MB in the beginning and 60.1 MB in the end (delta: 3.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 78.30 ms. Allocated memory is still 94.4 MB. Free memory was 60.1 MB in the beginning and 58.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.50 ms. Allocated memory is still 94.4 MB. Free memory was 58.0 MB in the beginning and 56.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 467.84 ms. Allocated memory is still 94.4 MB. Free memory was 56.5 MB in the beginning and 38.6 MB in the end (delta: 17.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1426.83 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 38.1 MB in the beginning and 67.5 MB in the end (delta: -29.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 60.72 ms. Allocated memory is still 119.5 MB. Free memory was 67.5 MB in the beginning and 64.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_flag-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 79 SDslu, 161 SDs, 0 SdLazy, 138 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3312 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...