./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice-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_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22d654ad48908d2db90206c3276d568dc9029be1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2020-11-28 07:37:58,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:58,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:59,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:59,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:59,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:59,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:59,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:59,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:59,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:59,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:59,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:59,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:59,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:59,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:59,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:59,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:59,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:59,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:59,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:59,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:59,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:59,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:59,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:59,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:59,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:59,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:59,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:59,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:59,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:59,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:59,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:59,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:59,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:59,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:59,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:59,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:59,117 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:59,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:59,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:59,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:59,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:37:59,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:59,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:59,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:59,147 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:59,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:59,148 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:59,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:59,149 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:59,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:59,149 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:59,150 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:59,150 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:59,151 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:59,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:59,151 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:59,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:59,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:59,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:59,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:59,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:59,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:37:59,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:59,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:37:59,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:59,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:59,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:37:59,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:59,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:37:59,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:59,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:59,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:59,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:59,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:59,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:59,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:37:59,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:59,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:59,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:37:59,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:59,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:59,158 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22d654ad48908d2db90206c3276d568dc9029be1 [2020-11-28 07:37:59,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:59,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:59,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:59,466 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:59,467 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:59,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/../../sv-benchmarks/c/list-properties/splice-1.i [2020-11-28 07:37:59,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/data/717206f44/8987a212e8ee4ac2bd0c6e49f6e84387/FLAG86d67819e [2020-11-28 07:38:00,121 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:00,122 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/sv-benchmarks/c/list-properties/splice-1.i [2020-11-28 07:38:00,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/data/717206f44/8987a212e8ee4ac2bd0c6e49f6e84387/FLAG86d67819e [2020-11-28 07:38:00,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/data/717206f44/8987a212e8ee4ac2bd0c6e49f6e84387 [2020-11-28 07:38:00,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:00,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:00,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:00,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:00,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:00,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:00" (1/1) ... [2020-11-28 07:38:00,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a5e478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:00, skipping insertion in model container [2020-11-28 07:38:00,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:00" (1/1) ... [2020-11-28 07:38:00,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:00,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:00,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:00,897 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:01,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:01,059 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:01,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01 WrapperNode [2020-11-28 07:38:01,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:01,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:01,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:01,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:01,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:01,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:01,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:01,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:01,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... [2020-11-28 07:38:01,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:01,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:01,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:01,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:01,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/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 [2020-11-28 07:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:38:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:38:01,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:38:01,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:01,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:01,983 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:01,983 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-28 07:38:01,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:01 BoogieIcfgContainer [2020-11-28 07:38:01,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:01,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:01,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:01,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:01,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:00" (1/3) ... [2020-11-28 07:38:01,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2211fbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:01, skipping insertion in model container [2020-11-28 07:38:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:01" (2/3) ... [2020-11-28 07:38:01,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2211fbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:01, skipping insertion in model container [2020-11-28 07:38:01,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:01" (3/3) ... [2020-11-28 07:38:01,996 INFO L111 eAbstractionObserver]: Analyzing ICFG splice-1.i [2020-11-28 07:38:02,006 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:02,011 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:38:02,023 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:38:02,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:02,060 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:38:02,060 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:02,060 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:02,060 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:02,060 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:02,060 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:02,061 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-11-28 07:38:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:38:02,081 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:02,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:02,082 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:02,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:02,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1053207580, now seen corresponding path program 1 times [2020-11-28 07:38:02,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:02,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939902019] [2020-11-28 07:38:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:02,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939902019] [2020-11-28 07:38:02,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:02,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:38:02,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615791489] [2020-11-28 07:38:02,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:38:02,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:38:02,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:38:02,284 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-11-28 07:38:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:02,307 INFO L93 Difference]: Finished difference Result 38 states and 56 transitions. [2020-11-28 07:38:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:38:02,310 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 07:38:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:02,319 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:38:02,319 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:38:02,334 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 [2020-11-28 07:38:02,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:38:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:38:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:38:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-28 07:38:02,371 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-11-28 07:38:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:02,372 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-28 07:38:02,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:38:02,372 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-28 07:38:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:38:02,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:02,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:02,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:38:02,374 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:02,378 INFO L82 PathProgramCache]: Analyzing trace with hash 307282515, now seen corresponding path program 1 times [2020-11-28 07:38:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:02,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233157117] [2020-11-28 07:38:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:02,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233157117] [2020-11-28 07:38:02,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:02,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:02,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325753919] [2020-11-28 07:38:02,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:02,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:02,523 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2020-11-28 07:38:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:02,606 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-11-28 07:38:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:02,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-11-28 07:38:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:02,608 INFO L225 Difference]: With dead ends: 37 [2020-11-28 07:38:02,608 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:38:02,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:38:02,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-11-28 07:38:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:38:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-11-28 07:38:02,613 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2020-11-28 07:38:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:02,614 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-11-28 07:38:02,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-11-28 07:38:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 07:38:02,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:02,615 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:02,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:38:02,615 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1214996938, now seen corresponding path program 1 times [2020-11-28 07:38:02,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:02,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494930237] [2020-11-28 07:38:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:38:02,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494930237] [2020-11-28 07:38:02,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:02,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666609247] [2020-11-28 07:38:02,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:02,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:02,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:02,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:02,741 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2020-11-28 07:38:02,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:02,810 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-11-28 07:38:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:02,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 07:38:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:02,812 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:38:02,812 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 07:38:02,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 07:38:02,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-11-28 07:38:02,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:38:02,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-28 07:38:02,818 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 17 [2020-11-28 07:38:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:02,818 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-28 07:38:02,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-28 07:38:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:38:02,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:02,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:02,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:38:02,820 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:02,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1745582797, now seen corresponding path program 1 times [2020-11-28 07:38:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:02,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328399199] [2020-11-28 07:38:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:38:02,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328399199] [2020-11-28 07:38:02,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:02,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:38:02,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192475907] [2020-11-28 07:38:02,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:02,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:38:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:02,907 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-11-28 07:38:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:02,971 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-11-28 07:38:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:02,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-28 07:38:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:02,972 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:38:02,972 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:38:02,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:38:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:38:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:38:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:38:02,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 18 [2020-11-28 07:38:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:02,976 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:38:02,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:38:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:38:02,977 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:02,977 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:02,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:38:02,977 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:38:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash -382459678, now seen corresponding path program 1 times [2020-11-28 07:38:02,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:38:02,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319639650] [2020-11-28 07:38:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:38:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:03,025 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:03,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:03,098 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:38:03,099 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:03,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:38:03,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:03 BoogieIcfgContainer [2020-11-28 07:38:03,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:03,154 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:03,154 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:03,154 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:03,155 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:01" (3/4) ... [2020-11-28 07:38:03,157 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:38:03,240 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_49f7f1d3-793f-4558-a943-f8b6a964c15b/bin/utaipan/witness.graphml [2020-11-28 07:38:03,240 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:03,241 INFO L168 Benchmark]: Toolchain (without parser) took 2836.39 ms. Allocated memory is still 119.5 MB. Free memory was 91.5 MB in the beginning and 73.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,242 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:03,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.40 ms. Allocated memory is still 119.5 MB. Free memory was 91.1 MB in the beginning and 84.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 119.5 MB. Free memory was 84.1 MB in the beginning and 82.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,243 INFO L168 Benchmark]: Boogie Preprocessor took 32.59 ms. Allocated memory is still 119.5 MB. Free memory was 82.1 MB in the beginning and 80.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,244 INFO L168 Benchmark]: RCFGBuilder took 840.92 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 93.8 MB in the end (delta: -13.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,245 INFO L168 Benchmark]: TraceAbstraction took 1165.65 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 75.9 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,245 INFO L168 Benchmark]: Witness Printer took 85.80 ms. Allocated memory is still 119.5 MB. Free memory was 75.9 MB in the beginning and 73.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:03,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 41.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 650.40 ms. Allocated memory is still 119.5 MB. Free memory was 91.1 MB in the beginning and 84.1 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.55 ms. Allocated memory is still 119.5 MB. Free memory was 84.1 MB in the beginning and 82.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.59 ms. Allocated memory is still 119.5 MB. Free memory was 82.1 MB in the beginning and 80.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 840.92 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 93.8 MB in the end (delta: -13.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1165.65 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 75.9 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * Witness Printer took 85.80 ms. Allocated memory is still 119.5 MB. Free memory was 75.9 MB in the beginning and 73.1 MB in the end (delta: 2.8 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 = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List l1; [L537] List l2; [L538] List b; [L539] List u; [L540] List p = a; [L541] COND TRUE __VERIFIER_nondet_int() [L542] COND TRUE \read(flag) [L543] p->h = 1 [L544] flag = 0 [L549] t = (List) malloc(sizeof(struct node)) [L550] COND FALSE !(t == 0) [L551] p->n = t [L552] EXPR p->n [L552] p = p->n [L541] COND FALSE !(__VERIFIER_nondet_int()) [L554] p->h = 3 [L555] EXPR a->h [L555] COND FALSE !(a->h == 3) [L556] flag = 1 [L557] l1 = 0 [L558] l2 = 0 [L559] p = a [L560] EXPR p->h [L560] COND TRUE p->h != 3 [L561] t = p [L562] EXPR p->n [L562] p = p->n [L563] COND TRUE \read(flag) [L564] t->n = l1 [L565] l1 = t [L566] flag = 0 [L560] EXPR p->h [L560] COND FALSE !(p->h != 3) [L573] p = l1 [L574] COND TRUE p != 0 [L575] EXPR p->h [L575] COND TRUE p->h != 2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "splice-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 12 SDslu, 73 SDs, 0 SdLazy, 65 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 1989 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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...