./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e1465127a7716c3a524ea62953f8f9857cdca3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 15:32:39,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 15:32:39,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 15:32:39,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 15:32:39,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 15:32:39,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 15:32:39,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 15:32:39,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 15:32:39,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 15:32:39,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 15:32:39,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 15:32:39,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 15:32:39,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 15:32:39,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 15:32:39,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 15:32:39,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 15:32:39,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 15:32:39,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 15:32:39,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 15:32:39,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 15:32:39,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 15:32:39,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 15:32:39,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 15:32:39,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 15:32:39,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 15:32:39,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 15:32:39,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 15:32:39,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 15:32:39,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 15:32:39,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 15:32:39,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 15:32:39,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 15:32:39,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 15:32:39,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 15:32:39,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 15:32:39,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 15:32:39,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 15:32:39,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 15:32:39,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 15:32:39,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 15:32:39,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 15:32:39,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 15:32:39,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 15:32:39,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 15:32:39,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 15:32:39,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 15:32:39,106 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 15:32:39,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 15:32:39,106 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 15:32:39,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 15:32:39,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 15:32:39,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 15:32:39,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 15:32:39,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 15:32:39,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 15:32:39,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 15:32:39,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 15:32:39,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 15:32:39,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 15:32:39,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 15:32:39,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 15:32:39,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_5eb8ca54-452d-4ca0-a769-78cbec08f07b/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(__VERIFIER_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 -> 27e1465127a7716c3a524ea62953f8f9857cdca3 [2019-12-07 15:32:39,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 15:32:39,233 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 15:32:39,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 15:32:39,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 15:32:39,236 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 15:32:39,237 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/../../sv-benchmarks/c/list-properties/list_flag-1.i [2019-12-07 15:32:39,280 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/data/c71aac6cc/e67653cb0e63445eb23c94367251ada1/FLAG4a10ad60b [2019-12-07 15:32:39,735 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 15:32:39,736 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/sv-benchmarks/c/list-properties/list_flag-1.i [2019-12-07 15:32:39,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/data/c71aac6cc/e67653cb0e63445eb23c94367251ada1/FLAG4a10ad60b [2019-12-07 15:32:40,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/data/c71aac6cc/e67653cb0e63445eb23c94367251ada1 [2019-12-07 15:32:40,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 15:32:40,055 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 15:32:40,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 15:32:40,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 15:32:40,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 15:32:40,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af3fe1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40, skipping insertion in model container [2019-12-07 15:32:40,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 15:32:40,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 15:32:40,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:32:40,310 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 15:32:40,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 15:32:40,368 INFO L208 MainTranslator]: Completed translation [2019-12-07 15:32:40,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40 WrapperNode [2019-12-07 15:32:40,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 15:32:40,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 15:32:40,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 15:32:40,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 15:32:40,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 15:32:40,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 15:32:40,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 15:32:40,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 15:32:40,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... [2019-12-07 15:32:40,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 15:32:40,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 15:32:40,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 15:32:40,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 15:32:40,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/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 [2019-12-07 15:32:40,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 15:32:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 15:32:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 15:32:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 15:32:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 15:32:40,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 15:32:40,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 15:32:40,616 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 15:32:40,616 INFO L287 CfgBuilder]: Removed 11 assume(true) statements. [2019-12-07 15:32:40,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:32:40 BoogieIcfgContainer [2019-12-07 15:32:40,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 15:32:40,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 15:32:40,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 15:32:40,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 15:32:40,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 03:32:40" (1/3) ... [2019-12-07 15:32:40,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f873d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:32:40, skipping insertion in model container [2019-12-07 15:32:40,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 03:32:40" (2/3) ... [2019-12-07 15:32:40,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17f873d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 03:32:40, skipping insertion in model container [2019-12-07 15:32:40,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:32:40" (3/3) ... [2019-12-07 15:32:40,622 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2019-12-07 15:32:40,628 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 15:32:40,633 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 15:32:40,640 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 15:32:40,654 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 15:32:40,654 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 15:32:40,655 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 15:32:40,655 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 15:32:40,655 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 15:32:40,655 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 15:32:40,655 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 15:32:40,655 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 15:32:40,664 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-12-07 15:32:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 15:32:40,668 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:40,668 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:40,668 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:40,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1941242346, now seen corresponding path program 1 times [2019-12-07 15:32:40,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:40,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489357750] [2019-12-07 15:32:40,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:32:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:32:40,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489357750] [2019-12-07 15:32:40,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:32:40,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 15:32:40,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941356200] [2019-12-07 15:32:40,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 15:32:40,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:32:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 15:32:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 15:32:40,776 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-12-07 15:32:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:32:40,787 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2019-12-07 15:32:40,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 15:32:40,788 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-12-07 15:32:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:32:40,794 INFO L225 Difference]: With dead ends: 38 [2019-12-07 15:32:40,794 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 15:32:40,796 INFO L630 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 [2019-12-07 15:32:40,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 15:32:40,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 15:32:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 15:32:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-12-07 15:32:40,817 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2019-12-07 15:32:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:32:40,817 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-12-07 15:32:40,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 15:32:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-12-07 15:32:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 15:32:40,818 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:40,818 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:40,818 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:40,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1795403316, now seen corresponding path program 1 times [2019-12-07 15:32:40,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:40,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026973011] [2019-12-07 15:32:40,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:32:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:32:40,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026973011] [2019-12-07 15:32:40,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:32:40,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:32:40,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498901321] [2019-12-07 15:32:40,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:32:40,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:32:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:32:40,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:32:40,880 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2019-12-07 15:32:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:32:40,956 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-12-07 15:32:40,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:32:40,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-12-07 15:32:40,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:32:40,957 INFO L225 Difference]: With dead ends: 44 [2019-12-07 15:32:40,957 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 15:32:40,958 INFO L630 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 [2019-12-07 15:32:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 15:32:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-12-07 15:32:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-07 15:32:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-12-07 15:32:40,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 13 [2019-12-07 15:32:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:32:40,962 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-12-07 15:32:40,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:32:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-12-07 15:32:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 15:32:40,963 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:40,963 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:40,963 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1242942375, now seen corresponding path program 1 times [2019-12-07 15:32:40,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:40,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000135612] [2019-12-07 15:32:40,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:32:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:32:41,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000135612] [2019-12-07 15:32:41,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:32:41,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:32:41,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494220931] [2019-12-07 15:32:41,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:32:41,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:32:41,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:32:41,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:32:41,006 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2019-12-07 15:32:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:32:41,076 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-12-07 15:32:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:32:41,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 15:32:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:32:41,078 INFO L225 Difference]: With dead ends: 46 [2019-12-07 15:32:41,078 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 15:32:41,078 INFO L630 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 [2019-12-07 15:32:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 15:32:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2019-12-07 15:32:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 15:32:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-12-07 15:32:41,083 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2019-12-07 15:32:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:32:41,083 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-12-07 15:32:41,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:32:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-12-07 15:32:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 15:32:41,084 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:41,084 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:41,084 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -799146, now seen corresponding path program 1 times [2019-12-07 15:32:41,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:41,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580293224] [2019-12-07 15:32:41,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:32:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:32:41,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580293224] [2019-12-07 15:32:41,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:32:41,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 15:32:41,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055787881] [2019-12-07 15:32:41,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 15:32:41,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:32:41,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 15:32:41,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 15:32:41,123 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 5 states. [2019-12-07 15:32:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:32:41,174 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-12-07 15:32:41,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 15:32:41,175 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-07 15:32:41,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:32:41,175 INFO L225 Difference]: With dead ends: 44 [2019-12-07 15:32:41,175 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 15:32:41,176 INFO L630 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 [2019-12-07 15:32:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 15:32:41,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 22. [2019-12-07 15:32:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 15:32:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 15:32:41,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2019-12-07 15:32:41,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:32:41,178 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 15:32:41,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 15:32:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 15:32:41,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 15:32:41,179 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:41,179 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:41,179 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:41,179 INFO L82 PathProgramCache]: Analyzing trace with hash -172690303, now seen corresponding path program 1 times [2019-12-07 15:32:41,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:41,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511816148] [2019-12-07 15:32:41,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 15:32:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 15:32:41,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511816148] [2019-12-07 15:32:41,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 15:32:41,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 15:32:41,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756550289] [2019-12-07 15:32:41,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 15:32:41,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 15:32:41,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 15:32:41,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 15:32:41,207 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-12-07 15:32:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 15:32:41,216 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-12-07 15:32:41,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 15:32:41,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-12-07 15:32:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 15:32:41,217 INFO L225 Difference]: With dead ends: 50 [2019-12-07 15:32:41,217 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 15:32:41,217 INFO L630 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 [2019-12-07 15:32:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 15:32:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-12-07 15:32:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 15:32:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-12-07 15:32:41,220 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2019-12-07 15:32:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 15:32:41,220 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-12-07 15:32:41,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 15:32:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-12-07 15:32:41,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-07 15:32:41,221 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 15:32:41,221 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 15:32:41,221 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 15:32:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 15:32:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash -616427248, now seen corresponding path program 1 times [2019-12-07 15:32:41,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 15:32:41,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433595285] [2019-12-07 15:32:41,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 15:32:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:32:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 15:32:41,264 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 15:32:41,264 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 15:32:41,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 03:32:41 BoogieIcfgContainer [2019-12-07 15:32:41,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 15:32:41,284 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 15:32:41,284 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 15:32:41,284 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 15:32:41,284 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 03:32:40" (3/4) ... [2019-12-07 15:32:41,286 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 15:32:41,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5eb8ca54-452d-4ca0-a769-78cbec08f07b/bin/uautomizer/witness.graphml [2019-12-07 15:32:41,318 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 15:32:41,319 INFO L168 Benchmark]: Toolchain (without parser) took 1263.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 937.1 MB in the beginning and 962.4 MB in the end (delta: -25.3 MB). Peak memory consumption was 73.8 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,319 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 958.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:32:41,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -139.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 15:32:41,320 INFO L168 Benchmark]: Boogie Preprocessor took 18.80 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,320 INFO L168 Benchmark]: RCFGBuilder took 201.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,321 INFO L168 Benchmark]: TraceAbstraction took 665.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 967.7 MB in the end (delta: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,321 INFO L168 Benchmark]: Witness Printer took 33.66 ms. Allocated memory is still 1.1 GB. Free memory was 967.7 MB in the beginning and 962.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 15:32:41,323 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 958.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 312.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 99.1 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -139.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.80 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 201.21 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 665.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 967.7 MB in the end (delta: 81.7 MB). Peak memory consumption was 81.7 MB. Max. memory is 11.5 GB. * Witness Printer took 33.66 ms. Allocated memory is still 1.1 GB. Free memory was 967.7 MB in the beginning and 962.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) [L524] COND FALSE !(a == 0) [L525] p = a [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 1 [L532] t = (List) malloc(sizeof(struct node)) [L533] COND FALSE !(t == 0) [L534] p->n = t [L535] EXPR p->n [L535] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a [L539] COND TRUE \read(flag) [L540] EXPR p->h [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h [L545] COND TRUE p->h != 3 [L546] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 107 SDtfs, 71 SDslu, 136 SDs, 0 SdLazy, 135 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 2762 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...