./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4b28e958de4f654443dbaa4f0a24d91f735460 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:29:34,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:29:34,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:29:34,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:29:34,199 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:29:34,200 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:29:34,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:29:34,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:29:34,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:29:34,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:29:34,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:29:34,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:29:34,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:29:34,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:29:34,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:29:34,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:29:34,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:29:34,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:29:34,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:29:34,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:29:34,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:29:34,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:29:34,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:29:34,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:29:34,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:29:34,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:29:34,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:29:34,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:29:34,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:29:34,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:29:34,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:29:34,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:29:34,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:29:34,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:29:34,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:29:34,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:29:34,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:29:34,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:29:34,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:29:34,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:29:34,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:29:34,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2020-11-30 03:29:34,280 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:29:34,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:29:34,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:29:34,281 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:29:34,282 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:29:34,282 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:29:34,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:29:34,282 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:29:34,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:29:34,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:29:34,283 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:29:34,283 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:29:34,284 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:29:34,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:29:34,284 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:29:34,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 03:29:34,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 03:29:34,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:29:34,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:29:34,286 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 03:29:34,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:29:34,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:29:34,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:29:34,287 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 03:29:34,287 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 03:29:34,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:29:34,287 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:29:34,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:29:34,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:29:34,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:29:34,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:29:34,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:29:34,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:29:34,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:29:34,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:29:34,289 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:29:34,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:29:34,290 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:29:34,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:29:34,290 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_c2004456-7634-4022-a57a-9d9bdbdd2416/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4b28e958de4f654443dbaa4f0a24d91f735460 [2020-11-30 03:29:34,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:29:34,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:29:34,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:29:34,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:29:34,564 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:29:34,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-1.i [2020-11-30 03:29:34,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/data/4ce17e6f1/0e60895029b14de9bd8a48a4037982a7/FLAGd819b7f15 [2020-11-30 03:29:35,183 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:29:35,184 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/sv-benchmarks/c/list-properties/simple-1.i [2020-11-30 03:29:35,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/data/4ce17e6f1/0e60895029b14de9bd8a48a4037982a7/FLAGd819b7f15 [2020-11-30 03:29:35,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/data/4ce17e6f1/0e60895029b14de9bd8a48a4037982a7 [2020-11-30 03:29:35,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:29:35,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:29:35,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:29:35,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:29:35,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:29:35,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:29:35" (1/1) ... [2020-11-30 03:29:35,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4152b73c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:35, skipping insertion in model container [2020-11-30 03:29:35,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:29:35" (1/1) ... [2020-11-30 03:29:35,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:29:35,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:29:35,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:29:35,946 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:29:36,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:29:36,072 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:29:36,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36 WrapperNode [2020-11-30 03:29:36,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:29:36,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:29:36,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:29:36,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:29:36,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:29:36,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:29:36,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:29:36,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:29:36,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... [2020-11-30 03:29:36,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:29:36,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:29:36,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:29:36,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:29:36,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/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 [2020-11-30 03:29:36,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 03:29:36,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 03:29:36,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:29:36,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:29:36,897 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:29:36,897 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 03:29:36,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:29:36 BoogieIcfgContainer [2020-11-30 03:29:36,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:29:36,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:29:36,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:29:36,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:29:36,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:29:35" (1/3) ... [2020-11-30 03:29:36,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b05457a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:29:36, skipping insertion in model container [2020-11-30 03:29:36,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:29:36" (2/3) ... [2020-11-30 03:29:36,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b05457a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:29:36, skipping insertion in model container [2020-11-30 03:29:36,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:29:36" (3/3) ... [2020-11-30 03:29:36,909 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-11-30 03:29:36,920 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:29:36,925 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-11-30 03:29:36,937 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-11-30 03:29:36,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:29:36,959 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 03:29:36,959 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:29:36,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:29:36,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:29:36,959 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:29:36,960 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:29:36,960 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:29:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-11-30 03:29:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 03:29:36,980 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:36,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 03:29:36,981 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:36,987 INFO L82 PathProgramCache]: Analyzing trace with hash 124074, now seen corresponding path program 1 times [2020-11-30 03:29:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:36,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964365628] [2020-11-30 03:29:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:37,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964365628] [2020-11-30 03:29:37,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:37,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 03:29:37,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426494305] [2020-11-30 03:29:37,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:29:37,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:37,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:29:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:29:37,214 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-11-30 03:29:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:37,355 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-30 03:29:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:29:37,358 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 03:29:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:37,368 INFO L225 Difference]: With dead ends: 38 [2020-11-30 03:29:37,368 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 03:29:37,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:29:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 03:29:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-30 03:29:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 03:29:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-30 03:29:37,415 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 3 [2020-11-30 03:29:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:37,415 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-30 03:29:37,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:29:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-30 03:29:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 03:29:37,416 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:37,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 03:29:37,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:29:37,417 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash 124075, now seen corresponding path program 1 times [2020-11-30 03:29:37,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014261806] [2020-11-30 03:29:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:37,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014261806] [2020-11-30 03:29:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:37,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 03:29:37,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685277566] [2020-11-30 03:29:37,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:29:37,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:37,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:29:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:29:37,481 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 3 states. [2020-11-30 03:29:37,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:37,536 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-30 03:29:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:29:37,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 03:29:37,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:37,537 INFO L225 Difference]: With dead ends: 34 [2020-11-30 03:29:37,537 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 03:29:37,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:29:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 03:29:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 03:29:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 03:29:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-11-30 03:29:37,543 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 3 [2020-11-30 03:29:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:37,543 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-11-30 03:29:37,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:29:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-11-30 03:29:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:29:37,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:37,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:29:37,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 03:29:37,545 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -598690558, now seen corresponding path program 1 times [2020-11-30 03:29:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:37,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233169637] [2020-11-30 03:29:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:37,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:37,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233169637] [2020-11-30 03:29:37,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:37,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 03:29:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496242846] [2020-11-30 03:29:37,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:29:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:37,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:29:37,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:29:37,637 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 4 states. [2020-11-30 03:29:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:37,862 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-11-30 03:29:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 03:29:37,864 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 03:29:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:37,866 INFO L225 Difference]: With dead ends: 60 [2020-11-30 03:29:37,866 INFO L226 Difference]: Without dead ends: 60 [2020-11-30 03:29:37,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:29:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-30 03:29:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2020-11-30 03:29:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 03:29:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-11-30 03:29:37,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2020-11-30 03:29:37,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:37,877 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-11-30 03:29:37,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:29:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-11-30 03:29:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:29:37,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:37,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:29:37,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 03:29:37,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash -598690557, now seen corresponding path program 1 times [2020-11-30 03:29:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:37,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037162614] [2020-11-30 03:29:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:37,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037162614] [2020-11-30 03:29:37,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:37,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 03:29:37,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116633410] [2020-11-30 03:29:37,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:29:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:38,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:29:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:29:38,000 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 4 states. [2020-11-30 03:29:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:38,177 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-30 03:29:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:29:38,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-30 03:29:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:38,178 INFO L225 Difference]: With dead ends: 50 [2020-11-30 03:29:38,178 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 03:29:38,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:29:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 03:29:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-11-30 03:29:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 03:29:38,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-11-30 03:29:38,185 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 6 [2020-11-30 03:29:38,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:38,185 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-11-30 03:29:38,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:29:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-11-30 03:29:38,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 03:29:38,186 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:38,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:29:38,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 03:29:38,186 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1408836533, now seen corresponding path program 1 times [2020-11-30 03:29:38,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:38,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70300420] [2020-11-30 03:29:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:38,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70300420] [2020-11-30 03:29:38,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:38,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 03:29:38,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421356630] [2020-11-30 03:29:38,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:29:38,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:38,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:29:38,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:29:38,272 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 4 states. [2020-11-30 03:29:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:38,396 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-30 03:29:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:29:38,397 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-30 03:29:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:38,398 INFO L225 Difference]: With dead ends: 48 [2020-11-30 03:29:38,398 INFO L226 Difference]: Without dead ends: 48 [2020-11-30 03:29:38,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:29:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-30 03:29:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-11-30 03:29:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 03:29:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-30 03:29:38,403 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 9 [2020-11-30 03:29:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:38,403 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-30 03:29:38,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:29:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-30 03:29:38,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 03:29:38,404 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:38,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:29:38,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 03:29:38,404 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash 187339587, now seen corresponding path program 1 times [2020-11-30 03:29:38,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:38,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781090932] [2020-11-30 03:29:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:38,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781090932] [2020-11-30 03:29:38,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:38,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-30 03:29:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252345837] [2020-11-30 03:29:38,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 03:29:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:38,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 03:29:38,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 03:29:38,569 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-11-30 03:29:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:38,711 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-11-30 03:29:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 03:29:38,712 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-11-30 03:29:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:38,713 INFO L225 Difference]: With dead ends: 50 [2020-11-30 03:29:38,713 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 03:29:38,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 03:29:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 03:29:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-11-30 03:29:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 03:29:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-11-30 03:29:38,720 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 12 [2020-11-30 03:29:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:38,720 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-11-30 03:29:38,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 03:29:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-11-30 03:29:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 03:29:38,721 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:38,721 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:29:38,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 03:29:38,721 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash 638290174, now seen corresponding path program 1 times [2020-11-30 03:29:38,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:38,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972971796] [2020-11-30 03:29:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972971796] [2020-11-30 03:29:38,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:38,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 03:29:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556949358] [2020-11-30 03:29:38,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:29:38,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:29:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:29:38,824 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-11-30 03:29:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:38,976 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-30 03:29:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 03:29:38,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 03:29:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:38,977 INFO L225 Difference]: With dead ends: 56 [2020-11-30 03:29:38,978 INFO L226 Difference]: Without dead ends: 56 [2020-11-30 03:29:38,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 03:29:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-30 03:29:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2020-11-30 03:29:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-30 03:29:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-30 03:29:38,983 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 12 [2020-11-30 03:29:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:38,983 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-30 03:29:38,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:29:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-30 03:29:38,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 03:29:38,984 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:38,984 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:29:38,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 03:29:38,984 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash 638290175, now seen corresponding path program 1 times [2020-11-30 03:29:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:38,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254937680] [2020-11-30 03:29:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:29:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:29:39,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254937680] [2020-11-30 03:29:39,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:29:39,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 03:29:39,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397562503] [2020-11-30 03:29:39,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:29:39,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:29:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:29:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:29:39,063 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-11-30 03:29:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:29:39,241 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-30 03:29:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 03:29:39,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 03:29:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:29:39,242 INFO L225 Difference]: With dead ends: 51 [2020-11-30 03:29:39,243 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 03:29:39,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 03:29:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 03:29:39,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-11-30 03:29:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 03:29:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-11-30 03:29:39,246 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 12 [2020-11-30 03:29:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:29:39,246 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-11-30 03:29:39,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:29:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-11-30 03:29:39,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 03:29:39,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:29:39,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:29:39,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 03:29:39,248 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 03:29:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:29:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1511900714, now seen corresponding path program 1 times [2020-11-30 03:29:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:29:39,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84581637] [2020-11-30 03:29:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:29:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:29:39,269 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:29:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:29:39,296 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:29:39,319 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 03:29:39,319 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 03:29:39,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 03:29:39,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:29:39 BoogieIcfgContainer [2020-11-30 03:29:39,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:29:39,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:29:39,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:29:39,346 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:29:39,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:29:36" (3/4) ... [2020-11-30 03:29:39,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 03:29:39,388 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c2004456-7634-4022-a57a-9d9bdbdd2416/bin/utaipan/witness.graphml [2020-11-30 03:29:39,389 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:29:39,391 INFO L168 Benchmark]: Toolchain (without parser) took 3899.46 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 85.8 MB in the beginning and 50.4 MB in the end (delta: 35.3 MB). Peak memory consumption was 61.9 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,391 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 73.4 MB. Free memory was 31.5 MB in the beginning and 31.5 MB in the end (delta: 34.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:29:39,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 578.94 ms. Allocated memory is still 121.6 MB. Free memory was 85.6 MB in the beginning and 83.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.80 ms. Allocated memory is still 121.6 MB. Free memory was 83.9 MB in the beginning and 81.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,393 INFO L168 Benchmark]: Boogie Preprocessor took 59.63 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 80.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:29:39,394 INFO L168 Benchmark]: RCFGBuilder took 690.19 ms. Allocated memory is still 121.6 MB. Free memory was 80.6 MB in the beginning and 53.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,395 INFO L168 Benchmark]: TraceAbstraction took 2443.24 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 52.6 MB in the end (delta: 448.7 kB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,395 INFO L168 Benchmark]: Witness Printer took 43.43 ms. Allocated memory is still 148.9 MB. Free memory was 51.6 MB in the beginning and 50.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:29:39,398 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 73.4 MB. Free memory was 31.5 MB in the beginning and 31.5 MB in the end (delta: 34.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 578.94 ms. Allocated memory is still 121.6 MB. Free memory was 85.6 MB in the beginning and 83.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.80 ms. Allocated memory is still 121.6 MB. Free memory was 83.9 MB in the beginning and 81.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.63 ms. Allocated memory is still 121.6 MB. Free memory was 81.8 MB in the beginning and 80.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 690.19 ms. Allocated memory is still 121.6 MB. Free memory was 80.6 MB in the beginning and 53.3 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2443.24 ms. Allocated memory was 121.6 MB in the beginning and 148.9 MB in the end (delta: 27.3 MB). Free memory was 53.1 MB in the beginning and 52.6 MB in the end (delta: 448.7 kB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * Witness Printer took 43.43 ms. Allocated memory is still 148.9 MB. Free memory was 51.6 MB in the beginning and 50.4 MB in the end (delta: 1.1 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: 531]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] a->h = 2 [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND FALSE !(p->h != 2) [L551] EXPR p->n [L551] p = p->n [L547] COND FALSE !(p!=0) [L553] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 307 SDslu, 144 SDs, 0 SdLazy, 386 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=6, 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, 8 MinimizatonAttempts, 68 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 2522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...