./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.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_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/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 6b14dd63832ca953bb678ff696ab3d8598ab5b62 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:50:58,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:50:58,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:50:59,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:50:59,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:50:59,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:50:59,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:50:59,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:50:59,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:50:59,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:50:59,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:50:59,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:50:59,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:50:59,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:50:59,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:50:59,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:50:59,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:50:59,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:50:59,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:50:59,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:50:59,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:50:59,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:50:59,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:50:59,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:50:59,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:50:59,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:50:59,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:50:59,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:50:59,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:50:59,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:50:59,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:50:59,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:50:59,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:50:59,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:50:59,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:50:59,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:50:59,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:50:59,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:50:59,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:50:59,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:50:59,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:50:59,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 16:50:59,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:50:59,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:50:59,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:50:59,067 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:50:59,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:50:59,067 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:50:59,067 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:50:59,067 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:50:59,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:50:59,068 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:50:59,068 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:50:59,068 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:50:59,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:50:59,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:50:59,068 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:50:59,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 16:50:59,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 16:50:59,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:50:59,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:50:59,069 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:50:59,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:50:59,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:50:59,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:50:59,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:50:59,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:50:59,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:50:59,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:50:59,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:50:59,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:50:59,072 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:50:59,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:50:59,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:50:59,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:50:59,072 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_ee784583-7e06-41a5-8115-3f2e6c3b9a94/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b14dd63832ca953bb678ff696ab3d8598ab5b62 [2020-12-09 16:50:59,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:50:59,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:50:59,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:50:59,263 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:50:59,264 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:50:59,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-12-09 16:50:59,305 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/data/bced205da/842f2e2c7d7e4faaa821079bc8ce289f/FLAGda98c57bf [2020-12-09 16:50:59,658 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:50:59,659 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-12-09 16:50:59,667 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/data/bced205da/842f2e2c7d7e4faaa821079bc8ce289f/FLAGda98c57bf [2020-12-09 16:50:59,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/data/bced205da/842f2e2c7d7e4faaa821079bc8ce289f [2020-12-09 16:50:59,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:50:59,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:50:59,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:59,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:50:59,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:50:59,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc8637e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59, skipping insertion in model container [2020-12-09 16:50:59,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:50:59,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:50:59,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:59,806 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:50:59,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:50:59,826 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:50:59,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59 WrapperNode [2020-12-09 16:50:59,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:50:59,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:59,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:50:59,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:50:59,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:50:59,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:50:59,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:50:59,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:50:59,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... [2020-12-09 16:50:59,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:50:59,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:50:59,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:50:59,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:50:59,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/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 16:50:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:50:59,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:50:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:50:59,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 16:51:00,054 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:51:00,055 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 16:51:00,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:00 BoogieIcfgContainer [2020-12-09 16:51:00,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:51:00,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:51:00,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:51:00,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:51:00,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:50:59" (1/3) ... [2020-12-09 16:51:00,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd09038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:51:00, skipping insertion in model container [2020-12-09 16:51:00,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:50:59" (2/3) ... [2020-12-09 16:51:00,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd09038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:51:00, skipping insertion in model container [2020-12-09 16:51:00,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:00" (3/3) ... [2020-12-09 16:51:00,063 INFO L111 eAbstractionObserver]: Analyzing ICFG memsetNonZero3.c [2020-12-09 16:51:00,073 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:51:00,075 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 16:51:00,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 16:51:00,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:51:00,098 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 16:51:00,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:51:00,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:51:00,099 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:51:00,099 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:51:00,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:51:00,099 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:51:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-09 16:51:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-12-09 16:51:00,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:51:00,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-12-09 16:51:00,114 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-09 16:51:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:51:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2020-12-09 16:51:00,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:51:00,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756778589] [2020-12-09 16:51:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:51:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:00,254 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 16:51:00,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756778589] [2020-12-09 16:51:00,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:51:00,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 16:51:00,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139117547] [2020-12-09 16:51:00,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:51:00,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:51:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:51:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:51:00,277 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-12-09 16:51:00,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:51:00,302 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-12-09 16:51:00,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:51:00,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-12-09 16:51:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:51:00,311 INFO L225 Difference]: With dead ends: 8 [2020-12-09 16:51:00,311 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 16:51:00,312 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 16:51:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 16:51:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 16:51:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 16:51:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-12-09 16:51:00,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2020-12-09 16:51:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:51:00,334 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-12-09 16:51:00,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:51:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-12-09 16:51:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 16:51:00,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:51:00,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 16:51:00,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:51:00,335 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-09 16:51:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:51:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2020-12-09 16:51:00,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:51:00,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469587349] [2020-12-09 16:51:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:51:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:00,378 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 16:51:00,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469587349] [2020-12-09 16:51:00,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:51:00,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 16:51:00,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937140359] [2020-12-09 16:51:00,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:51:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:51:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:51:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:51:00,381 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2020-12-09 16:51:00,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:51:00,389 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2020-12-09 16:51:00,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:51:00,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 16:51:00,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:51:00,390 INFO L225 Difference]: With dead ends: 6 [2020-12-09 16:51:00,390 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 16:51:00,391 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 16:51:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 16:51:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 16:51:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 16:51:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 16:51:00,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2020-12-09 16:51:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:51:00,393 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 16:51:00,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:51:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 16:51:00,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:51:00,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:51:00,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:51:00,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:51:00,394 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-09 16:51:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:51:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2020-12-09 16:51:00,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:51:00,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631976107] [2020-12-09 16:51:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:51:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:00,424 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 16:51:00,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631976107] [2020-12-09 16:51:00,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:51:00,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 16:51:00,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119440751] [2020-12-09 16:51:00,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:51:00,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:51:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:51:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:51:00,428 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2020-12-09 16:51:00,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:51:00,440 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2020-12-09 16:51:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:51:00,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 16:51:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:51:00,442 INFO L225 Difference]: With dead ends: 7 [2020-12-09 16:51:00,442 INFO L226 Difference]: Without dead ends: 7 [2020-12-09 16:51:00,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 16:51:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-09 16:51:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-09 16:51:00,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-09 16:51:00,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-12-09 16:51:00,445 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-12-09 16:51:00,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:51:00,445 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-12-09 16:51:00,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:51:00,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-12-09 16:51:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 16:51:00,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:51:00,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 16:51:00,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 16:51:00,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-09 16:51:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:51:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2020-12-09 16:51:00,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:51:00,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922031524] [2020-12-09 16:51:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:51:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:51:00,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922031524] [2020-12-09 16:51:00,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52194690] [2020-12-09 16:51:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:51:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:00,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 16:51:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:51:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:51:00,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:51:00,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:51:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700445569] [2020-12-09 16:51:00,631 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 16:51:00,631 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:51:00,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:51:00,638 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:51:00,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:51:00,879 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:51:01,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:51:01,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:51:01,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-12-09 16:51:01,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217564132] [2020-12-09 16:51:01,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 16:51:01,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:51:01,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 16:51:01,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-12-09 16:51:01,058 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2020-12-09 16:51:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:51:01,089 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-12-09 16:51:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 16:51:01,089 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-12-09 16:51:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:51:01,090 INFO L225 Difference]: With dead ends: 10 [2020-12-09 16:51:01,090 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 16:51:01,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-09 16:51:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 16:51:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 16:51:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 16:51:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-09 16:51:01,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2020-12-09 16:51:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:51:01,092 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-09 16:51:01,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 16:51:01,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-09 16:51:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 16:51:01,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:51:01,093 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-12-09 16:51:01,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-12-09 16:51:01,295 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-12-09 16:51:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:51:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -471213520, now seen corresponding path program 2 times [2020-12-09 16:51:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:51:01,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433945746] [2020-12-09 16:51:01,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:51:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:51:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:51:01,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433945746] [2020-12-09 16:51:01,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87205136] [2020-12-09 16:51:01,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:51:01,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 16:51:01,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:51:01,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 16:51:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:51:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 16:51:01,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:51:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 16:51:01,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 16:51:01,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2020-12-09 16:51:01,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462374475] [2020-12-09 16:51:01,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 16:51:01,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:51:01,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 16:51:01,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-09 16:51:01,563 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2020-12-09 16:51:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:51:01,576 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-12-09 16:51:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:51:01,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 16:51:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:51:01,576 INFO L225 Difference]: With dead ends: 9 [2020-12-09 16:51:01,576 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 16:51:01,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-09 16:51:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 16:51:01,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 16:51:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 16:51:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 16:51:01,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-12-09 16:51:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:51:01,577 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 16:51:01,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 16:51:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 16:51:01,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 16:51:01,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-09 16:51:01,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:51:01 BoogieIcfgContainer [2020-12-09 16:51:01,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:51:01,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:51:01,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:51:01,792 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:51:01,793 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:51:00" (3/4) ... [2020-12-09 16:51:01,800 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 16:51:01,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 16:51:01,825 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 16:51:01,826 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 16:51:01,879 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ee784583-7e06-41a5-8115-3f2e6c3b9a94/bin/utaipan/witness.graphml [2020-12-09 16:51:01,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:51:01,881 INFO L168 Benchmark]: Toolchain (without parser) took 2196.49 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 64.7 MB in the beginning and 48.2 MB in the end (delta: 16.5 MB). Peak memory consumption was 51.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,881 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 86.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:51:01,882 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.46 ms. Allocated memory is still 86.0 MB. Free memory was 64.5 MB in the beginning and 55.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,882 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.68 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 54.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,883 INFO L168 Benchmark]: Boogie Preprocessor took 15.05 ms. Allocated memory is still 86.0 MB. Free memory was 54.3 MB in the beginning and 53.4 MB in the end (delta: 890.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:51:01,883 INFO L168 Benchmark]: RCFGBuilder took 188.81 ms. Allocated memory is still 86.0 MB. Free memory was 53.4 MB in the beginning and 40.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,884 INFO L168 Benchmark]: TraceAbstraction took 1732.44 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 40.5 MB in the beginning and 50.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,884 INFO L168 Benchmark]: Witness Printer took 88.71 ms. Allocated memory is still 121.6 MB. Free memory was 50.3 MB in the beginning and 48.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:51:01,887 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 86.0 MB. Free memory is still 61.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 142.46 ms. Allocated memory is still 86.0 MB. Free memory was 64.5 MB in the beginning and 55.8 MB in the end (delta: 8.6 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.68 ms. Allocated memory is still 86.0 MB. Free memory was 55.8 MB in the beginning and 54.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.05 ms. Allocated memory is still 86.0 MB. Free memory was 54.3 MB in the beginning and 53.4 MB in the end (delta: 890.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 188.81 ms. Allocated memory is still 86.0 MB. Free memory was 53.4 MB in the beginning and 40.9 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1732.44 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 40.5 MB in the beginning and 50.3 MB in the end (delta: -9.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. * Witness Printer took 88.71 ms. Allocated memory is still 121.6 MB. Free memory was 50.3 MB in the beginning and 48.2 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: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 25]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 16 SDslu, 8 SDs, 0 SdLazy, 39 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 46 ConstructedInterpolants, 1 QuantifiedInterpolants, 2206 SizeOfPredicates, 4 NumberOfNonLiveVariables, 93 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 20/33 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 correct! Received shutdown request...