./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/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-a4ecdab [2020-11-22 12:51:45,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:51:45,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:51:45,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:51:45,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:51:45,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:51:45,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:51:45,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:51:45,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:51:45,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:51:45,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:51:45,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:51:45,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:51:45,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:51:45,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:51:45,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:51:45,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:51:45,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:51:45,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:51:45,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:51:45,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:51:45,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:51:45,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:51:45,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:51:45,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:51:45,461 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:51:45,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:51:45,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:51:45,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:51:45,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:51:45,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:51:45,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:51:45,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:51:45,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:51:45,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:51:45,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:51:45,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:51:45,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:51:45,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:51:45,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:51:45,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:51:45,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 12:51:45,531 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:51:45,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:51:45,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:51:45,533 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:51:45,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:51:45,533 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:51:45,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:51:45,534 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:51:45,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:51:45,534 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:51:45,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:51:45,535 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:51:45,535 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:51:45,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:51:45,536 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:51:45,537 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 12:51:45,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 12:51:45,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:51:45,538 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:51:45,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:51:45,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:51:45,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:51:45,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:51:45,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 12:51:45,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 12:51:45,540 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 12:51:45,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:51:45,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:51:45,540 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:51:45,541 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:51:45,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:51:45,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:51:45,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:51:45,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:45,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:51:45,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:51:45,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:51:45,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:51:45,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:51:45,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:51:45,548 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_45461115-72c8-4395-9347-ebc67b736d6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b14dd63832ca953bb678ff696ab3d8598ab5b62 [2020-11-22 12:51:45,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:51:45,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:51:46,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:51:46,001 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:51:46,002 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:51:46,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-11-22 12:51:46,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/data/a1a3245e4/9c8469344f3f4fa096b4ceffc748e1a5/FLAGe86b9a341 [2020-11-22 12:51:46,764 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:51:46,764 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/sv-benchmarks/c/ldv-memsafety/memsetNonZero3.c [2020-11-22 12:51:46,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/data/a1a3245e4/9c8469344f3f4fa096b4ceffc748e1a5/FLAGe86b9a341 [2020-11-22 12:51:47,114 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/data/a1a3245e4/9c8469344f3f4fa096b4ceffc748e1a5 [2020-11-22 12:51:47,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:51:47,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:51:47,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:47,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:51:47,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:51:47,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1459b9cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47, skipping insertion in model container [2020-11-22 12:51:47,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:51:47,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:51:47,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:47,393 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:51:47,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:51:47,429 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:51:47,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47 WrapperNode [2020-11-22 12:51:47,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:51:47,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:47,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:51:47,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:51:47,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:51:47,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:51:47,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:51:47,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:51:47,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... [2020-11-22 12:51:47,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:51:47,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:51:47,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:51:47,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:51:47,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:51:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:51:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:51:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:51:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 12:51:48,044 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:51:48,045 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-22 12:51:48,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:48 BoogieIcfgContainer [2020-11-22 12:51:48,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:51:48,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:51:48,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:51:48,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:51:48,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:51:47" (1/3) ... [2020-11-22 12:51:48,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebf88c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:48, skipping insertion in model container [2020-11-22 12:51:48,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:51:47" (2/3) ... [2020-11-22 12:51:48,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ebf88c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:51:48, skipping insertion in model container [2020-11-22 12:51:48,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:48" (3/3) ... [2020-11-22 12:51:48,062 INFO L111 eAbstractionObserver]: Analyzing ICFG memsetNonZero3.c [2020-11-22 12:51:48,076 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:51:48,082 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-22 12:51:48,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-22 12:51:48,141 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:51:48,142 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 12:51:48,142 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:51:48,142 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:51:48,142 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:51:48,143 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:51:48,143 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:51:48,143 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:51:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-22 12:51:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-11-22 12:51:48,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:48,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-11-22 12:51:48,175 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-11-22 12:51:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2020-11-22 12:51:48,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:48,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629801093] [2020-11-22 12:51:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:48,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629801093] [2020-11-22 12:51:48,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:48,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:51:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102927181] [2020-11-22 12:51:48,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:48,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:48,454 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-22 12:51:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:48,520 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2020-11-22 12:51:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:48,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-11-22 12:51:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:48,535 INFO L225 Difference]: With dead ends: 8 [2020-11-22 12:51:48,536 INFO L226 Difference]: Without dead ends: 7 [2020-11-22 12:51:48,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-22 12:51:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-22 12:51:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-22 12:51:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-22 12:51:48,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2020-11-22 12:51:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:48,575 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-22 12:51:48,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-22 12:51:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:51:48,576 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:48,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:51:48,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:51:48,577 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-11-22 12:51:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2020-11-22 12:51:48,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:48,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709685846] [2020-11-22 12:51:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:48,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709685846] [2020-11-22 12:51:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:51:48,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467834712] [2020-11-22 12:51:48,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:51:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:48,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:51:48,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:48,720 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 3 states. [2020-11-22 12:51:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:48,747 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2020-11-22 12:51:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:51:48,748 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 12:51:48,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:48,749 INFO L225 Difference]: With dead ends: 6 [2020-11-22 12:51:48,749 INFO L226 Difference]: Without dead ends: 6 [2020-11-22 12:51:48,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:51:48,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-11-22 12:51:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-22 12:51:48,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-22 12:51:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-11-22 12:51:48,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2020-11-22 12:51:48,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:48,752 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-11-22 12:51:48,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:51:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-11-22 12:51:48,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:51:48,753 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:48,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:51:48,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:51:48,754 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-11-22 12:51:48,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:48,754 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2020-11-22 12:51:48,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:48,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017118221] [2020-11-22 12:51:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:48,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017118221] [2020-11-22 12:51:48,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:51:48,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 12:51:48,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639222329] [2020-11-22 12:51:48,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:51:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:48,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:51:48,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:51:48,831 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2020-11-22 12:51:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:48,870 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2020-11-22 12:51:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:48,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-22 12:51:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:48,873 INFO L225 Difference]: With dead ends: 7 [2020-11-22 12:51:48,873 INFO L226 Difference]: Without dead ends: 7 [2020-11-22 12:51:48,873 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 [2020-11-22 12:51:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-11-22 12:51:48,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-22 12:51:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-22 12:51:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-11-22 12:51:48,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-11-22 12:51:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:48,877 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-11-22 12:51:48,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:51:48,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-11-22 12:51:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:51:48,877 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:48,878 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:51:48,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 12:51:48,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-11-22 12:51:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2020-11-22 12:51:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:48,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159462209] [2020-11-22 12:51:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159462209] [2020-11-22 12:51:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941611442] [2020-11-22 12:51:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/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 [2020-11-22 12:51:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 12:51:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:49,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:49,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669219327] [2020-11-22 12:51:49,352 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 12:51:49,352 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:51:49,361 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:51:49,368 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:51:49,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:51:50,065 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:51:50,370 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-11-22 12:51:50,662 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-11-22 12:51:50,731 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:51:50,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 12:51:50,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-11-22 12:51:50,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664029096] [2020-11-22 12:51:50,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-22 12:51:50,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-22 12:51:50,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:51:50,735 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 11 states. [2020-11-22 12:51:50,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:50,866 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2020-11-22 12:51:50,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:51:50,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-11-22 12:51:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:50,874 INFO L225 Difference]: With dead ends: 10 [2020-11-22 12:51:50,874 INFO L226 Difference]: Without dead ends: 10 [2020-11-22 12:51:50,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-22 12:51:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-22 12:51:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-22 12:51:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-22 12:51:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-22 12:51:50,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2020-11-22 12:51:50,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:50,879 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-22 12:51:50,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-22 12:51:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-22 12:51:50,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-22 12:51:50,880 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:51:50,880 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-11-22 12:51:51,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2020-11-22 12:51:51,103 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2020-11-22 12:51:51,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:51:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash -471213520, now seen corresponding path program 2 times [2020-11-22 12:51:51,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:51:51,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212688771] [2020-11-22 12:51:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:51:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:51:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:51:51,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212688771] [2020-11-22 12:51:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631911325] [2020-11-22 12:51:51,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/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 [2020-11-22 12:51:51,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-22 12:51:51,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:51:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 12:51:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:51:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-22 12:51:51,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:51:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-22 12:51:51,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:51:51,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2020-11-22 12:51:51,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591861696] [2020-11-22 12:51:51,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:51:51,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:51:51,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:51:51,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:51:51,491 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2020-11-22 12:51:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:51:51,538 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2020-11-22 12:51:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:51:51,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-22 12:51:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:51:51,540 INFO L225 Difference]: With dead ends: 9 [2020-11-22 12:51:51,540 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:51:51,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:51:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:51:51,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:51:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:51:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:51:51,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-11-22 12:51:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:51:51,542 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:51:51,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:51:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:51:51,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:51:51,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-22 12:51:51,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:51:51 BoogieIcfgContainer [2020-11-22 12:51:51,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:51:51,749 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:51:51,749 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:51:51,749 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:51:51,750 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:51:48" (3/4) ... [2020-11-22 12:51:51,753 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:51:51,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-22 12:51:51,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-22 12:51:51,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-22 12:51:51,808 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_45461115-72c8-4395-9347-ebc67b736d6d/bin/utaipan/witness.graphml [2020-11-22 12:51:51,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:51:51,810 INFO L168 Benchmark]: Toolchain (without parser) took 4689.40 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 79.4 MB in the beginning and 68.8 MB in the end (delta: 10.6 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,812 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 75.5 MB. Free memory was 33.6 MB in the beginning and 33.5 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:51:51,813 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.25 ms. Allocated memory is still 107.0 MB. Free memory was 79.2 MB in the beginning and 85.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,819 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.20 ms. Allocated memory is still 107.0 MB. Free memory was 85.5 MB in the beginning and 84.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:51:51,820 INFO L168 Benchmark]: Boogie Preprocessor took 24.96 ms. Allocated memory is still 107.0 MB. Free memory was 84.1 MB in the beginning and 83.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,822 INFO L168 Benchmark]: RCFGBuilder took 550.45 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 70.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,825 INFO L168 Benchmark]: TraceAbstraction took 3697.19 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 70.5 MB in the beginning and 70.9 MB in the end (delta: -380.4 kB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,826 INFO L168 Benchmark]: Witness Printer took 59.48 ms. Allocated memory is still 138.4 MB. Free memory was 70.9 MB in the beginning and 68.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:51:51,839 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 75.5 MB. Free memory was 33.6 MB in the beginning and 33.5 MB in the end (delta: 41.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.25 ms. Allocated memory is still 107.0 MB. Free memory was 79.2 MB in the beginning and 85.5 MB in the end (delta: -6.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.20 ms. Allocated memory is still 107.0 MB. Free memory was 85.5 MB in the beginning and 84.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.96 ms. Allocated memory is still 107.0 MB. Free memory was 84.1 MB in the beginning and 83.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 550.45 ms. Allocated memory is still 107.0 MB. Free memory was 83.1 MB in the beginning and 70.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3697.19 ms. Allocated memory was 107.0 MB in the beginning and 138.4 MB in the end (delta: 31.5 MB). Free memory was 70.5 MB in the beginning and 70.9 MB in the end (delta: -380.4 kB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. * Witness Printer took 59.48 ms. Allocated memory is still 138.4 MB. Free memory was 70.9 MB in the beginning and 68.8 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: 3.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s 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, 0.8s 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...