./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c --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_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/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 639853f2f40cff84155fe09902eff2b5a20185f5 .............................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:36:31,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:36:31,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:36:31,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:36:31,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:36:31,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:36:31,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:36:31,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:36:31,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:36:31,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:36:31,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:36:31,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:36:31,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:36:31,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:36:31,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:36:31,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:36:31,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:36:31,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:36:31,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:36:31,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:36:31,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:36:31,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:36:31,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:36:31,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:36:31,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:36:31,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:36:31,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:36:31,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:36:31,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:36:31,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:36:31,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:36:31,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:36:31,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:36:31,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:36:31,488 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:36:31,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:36:31,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:36:31,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:36:31,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:36:31,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:36:31,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:36:31,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-03 12:36:31,541 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:36:31,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:36:31,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:36:31,544 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:36:31,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:36:31,544 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:36:31,544 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:36:31,544 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:36:31,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:36:31,545 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:36:31,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:36:31,546 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:36:31,546 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:36:31,547 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:36:31,547 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:36:31,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 12:36:31,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 12:36:31,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:36:31,548 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:36:31,549 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:36:31,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:36:31,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:36:31,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:36:31,549 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-03 12:36:31,550 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-03 12:36:31,550 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-03 12:36:31,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:36:31,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:36:31,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:36:31,552 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:36:31,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:36:31,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:36:31,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:36:31,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:36:31,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:36:31,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:36:31,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:36:31,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:36:31,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:36:31,555 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_a54861b8-a160-4063-a660-7d9f28af9330/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 639853f2f40cff84155fe09902eff2b5a20185f5 [2020-12-03 12:36:31,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:36:31,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:36:31,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:36:31,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:36:31,931 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:36:31,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-12-03 12:36:32,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/data/a42b8a2be/91c3c4e2c9cb42dfa888caec5068270b/FLAGfa1f6e6f4 [2020-12-03 12:36:32,431 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:36:32,432 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-12-03 12:36:32,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/data/a42b8a2be/91c3c4e2c9cb42dfa888caec5068270b/FLAGfa1f6e6f4 [2020-12-03 12:36:32,812 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/data/a42b8a2be/91c3c4e2c9cb42dfa888caec5068270b [2020-12-03 12:36:32,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:36:32,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:36:32,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:32,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:36:32,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:36:32,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:32" (1/1) ... [2020-12-03 12:36:32,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e9baf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:32, skipping insertion in model container [2020-12-03 12:36:32,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:36:32" (1/1) ... [2020-12-03 12:36:32,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:36:32,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:36:33,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:33,025 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:36:33,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:36:33,053 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:36:33,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33 WrapperNode [2020-12-03 12:36:33,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:36:33,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:33,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:36:33,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:36:33,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:36:33,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:36:33,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:36:33,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:36:33,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... [2020-12-03 12:36:33,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:36:33,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:36:33,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:36:33,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:36:33,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/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 [2020-12-03 12:36:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:36:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:36:33,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:36:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:36:33,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:36:33,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:36:33,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:36:33,726 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-03 12:36:33,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:33 BoogieIcfgContainer [2020-12-03 12:36:33,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:36:33,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:36:33,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:36:33,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:36:33,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:36:32" (1/3) ... [2020-12-03 12:36:33,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240739a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:33, skipping insertion in model container [2020-12-03 12:36:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:36:33" (2/3) ... [2020-12-03 12:36:33,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240739a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:36:33, skipping insertion in model container [2020-12-03 12:36:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:33" (3/3) ... [2020-12-03 12:36:33,737 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-read.c [2020-12-03 12:36:33,750 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:36:33,754 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-12-03 12:36:33,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-12-03 12:36:33,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:36:33,785 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-03 12:36:33,785 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:36:33,785 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:36:33,786 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:36:33,786 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:36:33,786 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:36:33,786 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:36:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-03 12:36:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:33,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:33,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:33,806 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:33,811 INFO L82 PathProgramCache]: Analyzing trace with hash 3894484, now seen corresponding path program 1 times [2020-12-03 12:36:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:33,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327071685] [2020-12-03 12:36:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:33,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327071685] [2020-12-03 12:36:33,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:33,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:36:33,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086541951] [2020-12-03 12:36:33,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:36:33,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:33,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:36:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:36:33,982 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-03 12:36:34,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:34,023 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-03 12:36:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:36:34,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:36:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:34,033 INFO L225 Difference]: With dead ends: 39 [2020-12-03 12:36:34,033 INFO L226 Difference]: Without dead ends: 38 [2020-12-03 12:36:34,034 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 [2020-12-03 12:36:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-03 12:36:34,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-12-03 12:36:34,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:36:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-03 12:36:34,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2020-12-03 12:36:34,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:34,067 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-03 12:36:34,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:36:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-03 12:36:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:36:34,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:34,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:36:34,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:36:34,068 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:34,069 INFO L82 PathProgramCache]: Analyzing trace with hash 3793645, now seen corresponding path program 1 times [2020-12-03 12:36:34,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:34,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343439049] [2020-12-03 12:36:34,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:34,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:34,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343439049] [2020-12-03 12:36:34,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:34,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:36:34,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936969808] [2020-12-03 12:36:34,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:36:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:34,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:36:34,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:36:34,183 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-12-03 12:36:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:34,276 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-12-03 12:36:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:36:34,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-03 12:36:34,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:34,281 INFO L225 Difference]: With dead ends: 40 [2020-12-03 12:36:34,281 INFO L226 Difference]: Without dead ends: 40 [2020-12-03 12:36:34,283 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 [2020-12-03 12:36:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-03 12:36:34,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-12-03 12:36:34,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-03 12:36:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-03 12:36:34,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2020-12-03 12:36:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:34,292 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-03 12:36:34,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:36:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-03 12:36:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:36:34,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:34,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:36:34,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:36:34,294 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:34,297 INFO L82 PathProgramCache]: Analyzing trace with hash 117695404, now seen corresponding path program 1 times [2020-12-03 12:36:34,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:34,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322310395] [2020-12-03 12:36:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322310395] [2020-12-03 12:36:34,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:34,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:36:34,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210921002] [2020-12-03 12:36:34,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:36:34,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:36:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:36:34,411 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-12-03 12:36:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:34,485 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-03 12:36:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:36:34,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-03 12:36:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:34,486 INFO L225 Difference]: With dead ends: 44 [2020-12-03 12:36:34,487 INFO L226 Difference]: Without dead ends: 44 [2020-12-03 12:36:34,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:36:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-03 12:36:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-12-03 12:36:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-03 12:36:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-03 12:36:34,492 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2020-12-03 12:36:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:34,492 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-03 12:36:34,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:36:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-03 12:36:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:36:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:34,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:36:34,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:36:34,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash 117692998, now seen corresponding path program 1 times [2020-12-03 12:36:34,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:34,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111422135] [2020-12-03 12:36:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:34,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111422135] [2020-12-03 12:36:34,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:36:34,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:36:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144846409] [2020-12-03 12:36:34,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:36:34,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:34,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:36:34,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:36:34,530 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-12-03 12:36:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:34,578 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-03 12:36:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:36:34,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-03 12:36:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:34,579 INFO L225 Difference]: With dead ends: 24 [2020-12-03 12:36:34,580 INFO L226 Difference]: Without dead ends: 24 [2020-12-03 12:36:34,580 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 [2020-12-03 12:36:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-03 12:36:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-03 12:36:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-03 12:36:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-03 12:36:34,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2020-12-03 12:36:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:34,584 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-03 12:36:34,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:36:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-03 12:36:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:36:34,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:34,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:36:34,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:36:34,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-03 12:36:34,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:34,586 INFO L82 PathProgramCache]: Analyzing trace with hash 117692999, now seen corresponding path program 1 times [2020-12-03 12:36:34,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:34,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077521511] [2020-12-03 12:36:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:34,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:34,615 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:34,633 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:36:34,633 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:36:34,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:36:34,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:34 BoogieIcfgContainer [2020-12-03 12:36:34,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:34,653 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:34,654 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:34,654 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:34,654 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:36:33" (3/4) ... [2020-12-03 12:36:34,656 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:36:34,688 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a54861b8-a160-4063-a660-7d9f28af9330/bin/utaipan/witness.graphml [2020-12-03 12:36:34,688 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:34,690 INFO L168 Benchmark]: Toolchain (without parser) took 1873.33 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 58.0 MB in the beginning and 81.8 MB in the end (delta: -23.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:34,690 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 74.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:34,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 94.4 MB. Free memory was 57.8 MB in the beginning and 71.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:34,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 69.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:34,692 INFO L168 Benchmark]: Boogie Preprocessor took 26.41 ms. Allocated memory is still 94.4 MB. Free memory was 69.9 MB in the beginning and 68.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:34,693 INFO L168 Benchmark]: RCFGBuilder took 612.98 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 68.5 MB in the beginning and 82.5 MB in the end (delta: -14.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:34,694 INFO L168 Benchmark]: TraceAbstraction took 923.14 ms. Allocated memory is still 113.2 MB. Free memory was 82.1 MB in the beginning and 83.9 MB in the end (delta: -1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:34,694 INFO L168 Benchmark]: Witness Printer took 34.91 ms. Allocated memory is still 113.2 MB. Free memory was 83.2 MB in the beginning and 81.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:34,698 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 94.4 MB. Free memory is still 74.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.37 ms. Allocated memory is still 94.4 MB. Free memory was 57.8 MB in the beginning and 71.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 94.4 MB. Free memory was 71.4 MB in the beginning and 69.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.41 ms. Allocated memory is still 94.4 MB. Free memory was 69.9 MB in the beginning and 68.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 612.98 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 68.5 MB in the beginning and 82.5 MB in the end (delta: -14.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 923.14 ms. Allocated memory is still 113.2 MB. Free memory was 82.1 MB in the beginning and 83.9 MB in the end (delta: -1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 34.91 ms. Allocated memory is still 113.2 MB. Free memory was 83.2 MB in the beginning and 81.8 MB in the end (delta: 1.4 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: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 [L33] COND TRUE i < 100 [L21] int a[n], i; [L22] i = 0 [L22] COND FALSE !(i < size) [L12] int res = 0, i; [L13] i = 0 [L13] COND TRUE i < size [L14] b[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 123 SDslu, 89 SDs, 0 SdLazy, 103 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 47 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 188 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...