./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 744113fc2ef40828e0832f07c1176e726449b166 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 10:07:23,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:07:23,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:07:23,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:07:23,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:07:23,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:07:23,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:07:23,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:07:23,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:07:23,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:07:23,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:07:23,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:07:23,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:07:23,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:07:23,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:07:23,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:07:23,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:07:23,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:07:23,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:07:23,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:07:23,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:07:23,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:07:23,645 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:07:23,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:07:23,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:07:23,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:07:23,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:07:23,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:07:23,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:07:23,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:07:23,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:07:23,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:07:23,656 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:07:23,658 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:07:23,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:07:23,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:07:23,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:07:23,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:07:23,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:07:23,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:07:23,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:07:23,668 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 10:07:23,688 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:07:23,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:07:23,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:07:23,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:07:23,690 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:07:23,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:07:23,691 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:07:23,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:07:23,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:07:23,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:07:23,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:07:23,693 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 10:07:23,693 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 10:07:23,693 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 10:07:23,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:07:23,694 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 10:07:23,694 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 10:07:23,694 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:07:23,694 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:07:23,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:07:23,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:07:23,695 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:07:23,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:07:23,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:07:23,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:07:23,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:07:23,696 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 10:07:23,696 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 10:07:23,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 10:07:23,696 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer 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 -> Automizer 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 -> 744113fc2ef40828e0832f07c1176e726449b166 [2019-11-20 10:07:23,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:07:23,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:07:23,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:07:23,911 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:07:23,911 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:07:23,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2019-11-20 10:07:23,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/data/7abc125a0/ad1a4a22df254765b682e56ce42ac6ed/FLAG02e31f005 [2019-11-20 10:07:24,481 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:07:24,482 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/sv-benchmarks/c/array-memsafety/count_down_unsafe.i [2019-11-20 10:07:24,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/data/7abc125a0/ad1a4a22df254765b682e56ce42ac6ed/FLAG02e31f005 [2019-11-20 10:07:24,830 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/data/7abc125a0/ad1a4a22df254765b682e56ce42ac6ed [2019-11-20 10:07:24,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:07:24,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 10:07:24,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:07:24,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:07:24,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:07:24,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:07:24" (1/1) ... [2019-11-20 10:07:24,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48078027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:24, skipping insertion in model container [2019-11-20 10:07:24,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:07:24" (1/1) ... [2019-11-20 10:07:24,851 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:07:24,903 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:07:25,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:07:25,421 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:07:25,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:07:25,546 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:07:25,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25 WrapperNode [2019-11-20 10:07:25,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:07:25,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:07:25,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:07:25,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:07:25,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,589 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... [2019-11-20 10:07:25,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:07:25,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:07:25,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:07:25,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:07:25,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/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 [2019-11-20 10:07:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 10:07:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:07:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 10:07:25,702 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 10:07:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 10:07:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 10:07:25,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 10:07:25,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 10:07:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 10:07:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 10:07:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 10:07:25,704 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 10:07:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 10:07:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 10:07:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 10:07:25,705 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 10:07:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 10:07:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 10:07:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 10:07:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 10:07:25,706 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 10:07:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 10:07:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 10:07:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 10:07:25,707 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 10:07:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 10:07:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 10:07:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 10:07:25,708 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 10:07:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 10:07:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 10:07:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 10:07:25,709 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 10:07:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 10:07:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 10:07:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 10:07:25,710 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 10:07:25,711 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 10:07:25,712 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 10:07:25,713 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 10:07:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 10:07:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 10:07:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 10:07:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 10:07:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 10:07:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 10:07:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 10:07:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 10:07:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 10:07:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 10:07:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 10:07:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 10:07:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 10:07:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 10:07:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 10:07:25,718 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 10:07:25,719 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 10:07:25,720 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 10:07:25,721 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 10:07:25,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 10:07:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 10:07:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:07:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 10:07:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 10:07:25,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 10:07:25,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:07:26,299 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:07:26,299 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 10:07:26,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:07:26 BoogieIcfgContainer [2019-11-20 10:07:26,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:07:26,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:07:26,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:07:26,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:07:26,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:07:24" (1/3) ... [2019-11-20 10:07:26,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec08299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:07:26, skipping insertion in model container [2019-11-20 10:07:26,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:07:25" (2/3) ... [2019-11-20 10:07:26,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec08299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:07:26, skipping insertion in model container [2019-11-20 10:07:26,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:07:26" (3/3) ... [2019-11-20 10:07:26,307 INFO L109 eAbstractionObserver]: Analyzing ICFG count_down_unsafe.i [2019-11-20 10:07:26,316 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:07:26,322 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-20 10:07:26,333 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-20 10:07:26,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:07:26,351 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 10:07:26,351 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:07:26,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:07:26,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:07:26,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:07:26,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:07:26,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:07:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-11-20 10:07:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 10:07:26,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:07:26,373 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:07:26,374 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 10:07:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:07:26,379 INFO L82 PathProgramCache]: Analyzing trace with hash -587521551, now seen corresponding path program 1 times [2019-11-20 10:07:26,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:07:26,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [290412930] [2019-11-20 10:07:26,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:07:26,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:07:26,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:07:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:07:26,648 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:07:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:07:26,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [290412930] [2019-11-20 10:07:26,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:07:26,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 10:07:26,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298449209] [2019-11-20 10:07:26,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:07:26,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:07:26,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:07:26,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:07:26,689 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-11-20 10:07:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:07:26,806 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-20 10:07:26,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:07:26,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-20 10:07:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:07:26,817 INFO L225 Difference]: With dead ends: 36 [2019-11-20 10:07:26,818 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 10:07:26,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:07:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 10:07:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-20 10:07:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 10:07:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-20 10:07:26,862 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2019-11-20 10:07:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:07:26,863 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-20 10:07:26,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:07:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-20 10:07:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 10:07:26,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:07:26,864 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:07:27,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:27,067 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 10:07:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:07:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514850, now seen corresponding path program 1 times [2019-11-20 10:07:27,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:07:27,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2098104914] [2019-11-20 10:07:27,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:27,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:07:27,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:07:27,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:07:27,310 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 10:07:27,311 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:07:27,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:07:27,314 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:07:27,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:07:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:07:27,323 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:07:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:07:27,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098104914] [2019-11-20 10:07:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:07:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:07:27,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254444670] [2019-11-20 10:07:27,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:07:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:07:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:07:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:07:27,336 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2019-11-20 10:07:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:07:27,413 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-11-20 10:07:27,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:07:27,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 10:07:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:07:27,415 INFO L225 Difference]: With dead ends: 29 [2019-11-20 10:07:27,416 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 10:07:27,416 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:07:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 10:07:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 10:07:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 10:07:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-20 10:07:27,421 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 12 [2019-11-20 10:07:27,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:07:27,421 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-20 10:07:27,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:07:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-20 10:07:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 10:07:27,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:07:27,422 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:07:27,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:27,623 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 10:07:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:07:27,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1967514849, now seen corresponding path program 1 times [2019-11-20 10:07:27,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:07:27,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1242663522] [2019-11-20 10:07:27,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 10:07:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 10:07:27,900 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 10:07:27,900 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 10:07:28,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:07:28,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:07:28 BoogieIcfgContainer [2019-11-20 10:07:28,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:07:28,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:07:28,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:07:28,138 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:07:28,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:07:26" (3/4) ... [2019-11-20 10:07:28,140 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 10:07:28,202 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_78386e40-cde2-401e-a0cc-1f13b089234b/bin/uautomizer/witness.graphml [2019-11-20 10:07:28,202 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:07:28,204 INFO L168 Benchmark]: Toolchain (without parser) took 3368.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 940.7 MB in the beginning and 975.8 MB in the end (delta: -35.0 MB). Peak memory consumption was 128.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:07:28,205 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:07:28,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 712.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 10:07:28,206 INFO L168 Benchmark]: Boogie Preprocessor took 80.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:07:28,206 INFO L168 Benchmark]: RCFGBuilder took 670.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 11.5 GB. [2019-11-20 10:07:28,207 INFO L168 Benchmark]: TraceAbstraction took 1835.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 115.3 MB). Peak memory consumption was 115.3 MB. Max. memory is 11.5 GB. [2019-11-20 10:07:28,207 INFO L168 Benchmark]: Witness Printer took 65.23 ms. Allocated memory is still 1.2 GB. Free memory is still 975.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:07:28,209 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 712.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.1 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -198.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 670.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1835.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 975.8 MB in the end (delta: 115.3 MB). Peak memory consumption was 115.3 MB. Max. memory is 11.5 GB. * Witness Printer took 65.23 ms. Allocated memory is still 1.2 GB. Free memory is still 975.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 524]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L513] int i, j; [L514] int val; [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L516] length = 1 VAL [length=1] [L517] int *arr = __builtin_alloca (length); VAL [__builtin_alloca (length)={3:0}, arr={3:0}, length=1] [L518] COND FALSE !(!arr) [L519] i=0 VAL [__builtin_alloca (length)={3:0}, arr={3:0}, i=0, length=1] [L519] COND TRUE i