./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3444bab46e3acd40907f623c997f9115bc97543a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 05:20:48,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 05:20:48,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 05:20:48,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 05:20:48,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 05:20:48,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 05:20:48,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 05:20:48,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 05:20:48,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 05:20:48,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 05:20:48,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 05:20:48,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 05:20:48,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 05:20:48,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 05:20:48,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 05:20:48,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 05:20:48,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 05:20:48,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 05:20:48,256 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 05:20:48,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 05:20:48,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 05:20:48,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 05:20:48,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 05:20:48,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 05:20:48,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 05:20:48,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 05:20:48,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 05:20:48,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 05:20:48,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 05:20:48,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 05:20:48,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 05:20:48,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 05:20:48,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 05:20:48,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 05:20:48,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 05:20:48,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 05:20:48,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 05:20:48,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 05:20:48,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 05:20:48,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 05:20:48,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 05:20:48,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 05:20:48,300 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 05:20:48,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 05:20:48,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 05:20:48,301 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 05:20:48,302 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 05:20:48,302 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 05:20:48,303 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 05:20:48,303 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 05:20:48,303 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 05:20:48,303 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 05:20:48,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 05:20:48,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 05:20:48,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 05:20:48,304 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 05:20:48,305 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 05:20:48,306 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 05:20:48,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 05:20:48,306 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 05:20:48,306 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 05:20:48,306 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 05:20:48,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 05:20:48,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 05:20:48,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 05:20:48,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 05:20:48,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 05:20:48,307 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 05:20:48,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 05:20:48,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 05:20:48,308 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 05:20:48,308 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_d614c3ac-759f-47d2-a499-1f0a003b170d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3444bab46e3acd40907f623c997f9115bc97543a [2020-12-09 05:20:48,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 05:20:48,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 05:20:48,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 05:20:48,494 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 05:20:48,494 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 05:20:48,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/../../sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2020-12-09 05:20:48,546 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/data/6111750ed/2c0808cce8034dc3901fc39567b055d2/FLAGec452b649 [2020-12-09 05:20:48,949 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 05:20:48,949 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2020-12-09 05:20:48,961 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/data/6111750ed/2c0808cce8034dc3901fc39567b055d2/FLAGec452b649 [2020-12-09 05:20:48,970 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/data/6111750ed/2c0808cce8034dc3901fc39567b055d2 [2020-12-09 05:20:48,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 05:20:48,973 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 05:20:48,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 05:20:48,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 05:20:48,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 05:20:48,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:20:48" (1/1) ... [2020-12-09 05:20:48,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3037dc83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:48, skipping insertion in model container [2020-12-09 05:20:48,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:20:48" (1/1) ... [2020-12-09 05:20:48,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 05:20:49,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 05:20:49,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:20:49,220 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 05:20:49,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 05:20:49,290 INFO L208 MainTranslator]: Completed translation [2020-12-09 05:20:49,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49 WrapperNode [2020-12-09 05:20:49,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 05:20:49,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 05:20:49,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 05:20:49,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 05:20:49,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 05:20:49,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 05:20:49,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 05:20:49,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 05:20:49,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... [2020-12-09 05:20:49,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 05:20:49,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 05:20:49,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 05:20:49,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 05:20:49,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/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 [2020-12-09 05:20:49,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 05:20:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 05:20:49,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 05:20:49,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 05:20:49,606 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 05:20:49,607 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 05:20:49,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:20:49 BoogieIcfgContainer [2020-12-09 05:20:49,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 05:20:49,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 05:20:49,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 05:20:49,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 05:20:49,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:20:48" (1/3) ... [2020-12-09 05:20:49,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6661d745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:20:49, skipping insertion in model container [2020-12-09 05:20:49,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:20:49" (2/3) ... [2020-12-09 05:20:49,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6661d745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:20:49, skipping insertion in model container [2020-12-09 05:20:49,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:20:49" (3/3) ... [2020-12-09 05:20:49,614 INFO L111 eAbstractionObserver]: Analyzing ICFG cmp-freed-ptr.i [2020-12-09 05:20:49,625 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 05:20:49,627 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-09 05:20:49,634 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-09 05:20:49,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 05:20:49,650 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 05:20:49,650 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 05:20:49,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 05:20:49,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 05:20:49,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 05:20:49,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 05:20:49,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 05:20:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 05:20:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-12-09 05:20:49,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:49,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-12-09 05:20:49,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1925, now seen corresponding path program 1 times [2020-12-09 05:20:49,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:49,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136946322] [2020-12-09 05:20:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:49,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136946322] [2020-12-09 05:20:49,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:49,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:20:49,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015223498] [2020-12-09 05:20:49,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:49,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:49,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:49,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:49,818 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-09 05:20:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:49,829 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-09 05:20:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:49,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-12-09 05:20:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:49,835 INFO L225 Difference]: With dead ends: 22 [2020-12-09 05:20:49,835 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 05:20:49,836 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 [2020-12-09 05:20:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 05:20:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 05:20:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 05:20:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-09 05:20:49,857 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 2 [2020-12-09 05:20:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:49,857 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-09 05:20:49,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-09 05:20:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 05:20:49,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:49,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 05:20:49,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 05:20:49,858 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:49,859 INFO L82 PathProgramCache]: Analyzing trace with hash 59711, now seen corresponding path program 1 times [2020-12-09 05:20:49,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:49,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070072346] [2020-12-09 05:20:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:49,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070072346] [2020-12-09 05:20:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:20:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706057393] [2020-12-09 05:20:49,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:49,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:49,882 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 3 states. [2020-12-09 05:20:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:49,896 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-09 05:20:49,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:49,896 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 05:20:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:49,897 INFO L225 Difference]: With dead ends: 20 [2020-12-09 05:20:49,897 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 05:20:49,898 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 [2020-12-09 05:20:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 05:20:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 05:20:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 05:20:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-09 05:20:49,902 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 3 [2020-12-09 05:20:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:49,902 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-09 05:20:49,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-09 05:20:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 05:20:49,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:49,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 05:20:49,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 05:20:49,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1851079, now seen corresponding path program 1 times [2020-12-09 05:20:49,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:49,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742611722] [2020-12-09 05:20:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:49,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742611722] [2020-12-09 05:20:49,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:49,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 05:20:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581344431] [2020-12-09 05:20:49,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:49,944 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 3 states. [2020-12-09 05:20:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:49,955 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-09 05:20:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:49,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 05:20:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:49,956 INFO L225 Difference]: With dead ends: 19 [2020-12-09 05:20:49,956 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 05:20:49,956 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 [2020-12-09 05:20:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 05:20:49,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 05:20:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 05:20:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-09 05:20:49,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 4 [2020-12-09 05:20:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:49,959 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-09 05:20:49,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-09 05:20:49,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 05:20:49,959 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:49,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 05:20:49,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 05:20:49,960 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:49,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1778888490, now seen corresponding path program 1 times [2020-12-09 05:20:49,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:49,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291591612] [2020-12-09 05:20:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:49,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:49,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291591612] [2020-12-09 05:20:49,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:49,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:20:49,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297840416] [2020-12-09 05:20:49,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:49,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:49,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:49,995 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 3 states. [2020-12-09 05:20:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:50,004 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-09 05:20:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:50,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 05:20:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:50,005 INFO L225 Difference]: With dead ends: 17 [2020-12-09 05:20:50,005 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 05:20:50,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 05:20:50,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 05:20:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 05:20:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-09 05:20:50,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 6 [2020-12-09 05:20:50,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:50,008 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-09 05:20:50,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-09 05:20:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 05:20:50,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:50,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:20:50,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 05:20:50,010 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:50,010 INFO L82 PathProgramCache]: Analyzing trace with hash -689031604, now seen corresponding path program 1 times [2020-12-09 05:20:50,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:50,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48502526] [2020-12-09 05:20:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:50,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48502526] [2020-12-09 05:20:50,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:50,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:20:50,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549047650] [2020-12-09 05:20:50,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:50,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:50,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:50,043 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-12-09 05:20:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:50,058 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-09 05:20:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:50,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 05:20:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:50,059 INFO L225 Difference]: With dead ends: 15 [2020-12-09 05:20:50,059 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 05:20:50,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:50,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 05:20:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 05:20:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 05:20:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 05:20:50,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2020-12-09 05:20:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:50,063 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 05:20:50,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 05:20:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 05:20:50,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:50,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:20:50,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 05:20:50,064 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash 114856812, now seen corresponding path program 1 times [2020-12-09 05:20:50,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:50,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776000091] [2020-12-09 05:20:50,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:50,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776000091] [2020-12-09 05:20:50,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:50,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 05:20:50,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733735178] [2020-12-09 05:20:50,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 05:20:50,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:50,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 05:20:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:50,095 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2020-12-09 05:20:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:50,109 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-09 05:20:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 05:20:50,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 05:20:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:50,110 INFO L225 Difference]: With dead ends: 17 [2020-12-09 05:20:50,110 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 05:20:50,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 05:20:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 05:20:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 05:20:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 05:20:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-09 05:20:50,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2020-12-09 05:20:50,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:50,114 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-09 05:20:50,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 05:20:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-09 05:20:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 05:20:50,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:50,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:20:50,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 05:20:50,115 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash -734406065, now seen corresponding path program 1 times [2020-12-09 05:20:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:50,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846266101] [2020-12-09 05:20:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 05:20:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 05:20:50,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846266101] [2020-12-09 05:20:50,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 05:20:50,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 05:20:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671075934] [2020-12-09 05:20:50,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 05:20:50,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 05:20:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 05:20:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 05:20:50,171 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-12-09 05:20:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 05:20:50,196 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-09 05:20:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 05:20:50,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 05:20:50,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 05:20:50,197 INFO L225 Difference]: With dead ends: 16 [2020-12-09 05:20:50,197 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 05:20:50,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 05:20:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 05:20:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 05:20:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 05:20:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2020-12-09 05:20:50,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 9 [2020-12-09 05:20:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 05:20:50,203 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2020-12-09 05:20:50,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 05:20:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2020-12-09 05:20:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 05:20:50,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 05:20:50,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 05:20:50,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 05:20:50,205 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 05:20:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 05:20:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -165933941, now seen corresponding path program 1 times [2020-12-09 05:20:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 05:20:50,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609803282] [2020-12-09 05:20:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 05:20:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:20:50,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:20:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 05:20:50,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 05:20:50,251 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 05:20:50,251 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 05:20:50,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 05:20:50,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:20:50 BoogieIcfgContainer [2020-12-09 05:20:50,272 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 05:20:50,272 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 05:20:50,273 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 05:20:50,273 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 05:20:50,273 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:20:49" (3/4) ... [2020-12-09 05:20:50,275 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 05:20:50,301 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d614c3ac-759f-47d2-a499-1f0a003b170d/bin/utaipan/witness.graphml [2020-12-09 05:20:50,301 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 05:20:50,302 INFO L168 Benchmark]: Toolchain (without parser) took 1328.05 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 68.8 MB in the beginning and 93.2 MB in the end (delta: -24.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:20:50,303 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 34.1 MB in the beginning and 34.0 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:20:50,303 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.31 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 69.1 MB in the end (delta: -487.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 05:20:50,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 102.8 MB. Free memory was 69.1 MB in the beginning and 67.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:20:50,304 INFO L168 Benchmark]: Boogie Preprocessor took 18.90 ms. Allocated memory is still 102.8 MB. Free memory was 67.6 MB in the beginning and 66.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:20:50,304 INFO L168 Benchmark]: RCFGBuilder took 265.52 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 50.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 05:20:50,304 INFO L168 Benchmark]: TraceAbstraction took 662.77 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 50.6 MB in the beginning and 95.3 MB in the end (delta: -44.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 05:20:50,305 INFO L168 Benchmark]: Witness Printer took 28.51 ms. Allocated memory is still 123.7 MB. Free memory was 95.3 MB in the beginning and 93.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 05:20:50,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 34.1 MB in the beginning and 34.0 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.31 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 69.1 MB in the end (delta: -487.6 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.94 ms. Allocated memory is still 102.8 MB. Free memory was 69.1 MB in the beginning and 67.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.90 ms. Allocated memory is still 102.8 MB. Free memory was 67.6 MB in the beginning and 66.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 265.52 ms. Allocated memory is still 102.8 MB. Free memory was 66.5 MB in the beginning and 50.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 662.77 ms. Allocated memory was 102.8 MB in the beginning and 123.7 MB in the end (delta: 21.0 MB). Free memory was 50.6 MB in the beginning and 95.3 MB in the end (delta: -44.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 28.51 ms. Allocated memory is still 123.7 MB. Free memory was 95.3 MB in the beginning and 93.2 MB in the end (delta: 2.1 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: 554]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L543] struct T* x = ((void *)0); [L544] struct T* y = ((void *)0); [L545] y = malloc(sizeof(*y)) [L546] intptr_t adressY = (intptr_t) y; [L547] free(y) [L547] free(y) [L547] free(y) [L548] x = malloc(sizeof(*x)) [L549] intptr_t adressX = (intptr_t) x; [L550] COND TRUE adressX == adressY [L552] free(x) [L552] free(x) [L552] free(x) [L554] free(x) [L554] free(x) [L554] free(x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 90 SDtfs, 74 SDslu, 24 SDs, 0 SdLazy, 60 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 808 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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...