./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrlen_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_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 15362e3354379e86b7768de02eb760f50ed72879 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 02:19:53,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:19:53,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:19:53,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:19:53,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:19:53,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:19:53,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:19:53,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:19:53,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:19:53,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:19:53,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:19:53,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:19:53,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:19:53,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:19:53,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:19:53,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:19:53,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:19:53,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:19:53,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:19:53,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:19:53,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:19:53,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:19:53,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:19:53,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:19:53,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:19:53,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:19:53,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:19:53,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:19:53,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:19:53,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:19:53,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:19:53,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:19:53,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:19:53,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:19:53,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:19:53,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:19:53,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:19:53,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:19:53,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:19:53,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:19:53,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:19:53,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 02:19:53,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:19:53,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:19:53,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:19:53,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:19:53,612 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:19:53,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:19:53,613 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:19:53,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 02:19:53,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:19:53,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:19:53,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:19:53,614 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 02:19:53,614 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 02:19:53,614 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 02:19:53,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:19:53,614 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 02:19:53,615 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 02:19:53,615 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:19:53,615 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:19:53,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:19:53,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:19:53,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:19:53,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:19:53,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:19:53,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:19:53,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:19:53,617 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 02:19:53,617 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 02:19:53,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 02:19:53,617 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_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 -> 15362e3354379e86b7768de02eb760f50ed72879 [2019-11-20 02:19:53,818 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:19:53,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:19:53,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:19:53,841 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:19:53,842 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:19:53,843 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2019-11-20 02:19:53,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/data/67db594d4/78283fcae77a477ca1a23c4d5552227c/FLAG66ef62f68 [2019-11-20 02:19:54,540 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:19:54,541 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/sv-benchmarks/c/array-memsafety/cstrlen_unsafe.i [2019-11-20 02:19:54,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/data/67db594d4/78283fcae77a477ca1a23c4d5552227c/FLAG66ef62f68 [2019-11-20 02:19:54,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/data/67db594d4/78283fcae77a477ca1a23c4d5552227c [2019-11-20 02:19:54,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:19:54,838 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 02:19:54,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:19:54,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:19:54,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:19:54,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:19:54" (1/1) ... [2019-11-20 02:19:54,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@819eacd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:54, skipping insertion in model container [2019-11-20 02:19:54,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:19:54" (1/1) ... [2019-11-20 02:19:54,866 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:19:54,916 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:19:55,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:19:55,372 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:19:55,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:19:55,515 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:19:55,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55 WrapperNode [2019-11-20 02:19:55,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:19:55,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:19:55,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:19:55,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:19:55,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... [2019-11-20 02:19:55,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:19:55,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:19:55,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:19:55,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:19:55,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 02:19:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 02:19:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:19:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 02:19:55,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 02:19:55,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 02:19:55,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 02:19:55,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 02:19:55,670 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2019-11-20 02:19:55,670 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2019-11-20 02:19:55,671 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 02:19:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 02:19:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 02:19:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 02:19:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 02:19:55,672 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 02:19:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 02:19:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 02:19:55,673 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 02:19:55,674 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 02:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 02:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 02:19:55,675 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 02:19:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 02:19:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 02:19:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 02:19:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 02:19:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 02:19:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 02:19:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 02:19:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 02:19:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 02:19:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 02:19:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 02:19:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 02:19:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 02:19:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 02:19:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 02:19:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 02:19:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 02:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 02:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 02:19:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 02:19:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 02:19:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 02:19:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 02:19:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 02:19:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 02:19:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 02:19:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 02:19:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 02:19:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 02:19:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 02:19:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 02:19:55,693 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 02:19:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 02:19:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 02:19:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 02:19:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 02:19:55,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 02:19:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 02:19:55,695 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2019-11-20 02:19:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 02:19:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 02:19:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2019-11-20 02:19:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 02:19:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 02:19:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 02:19:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 02:19:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:19:56,451 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:19:56,451 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 02:19:56,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:19:56 BoogieIcfgContainer [2019-11-20 02:19:56,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:19:56,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:19:56,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:19:56,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:19:56,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:19:54" (1/3) ... [2019-11-20 02:19:56,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6ddb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:19:56, skipping insertion in model container [2019-11-20 02:19:56,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:19:55" (2/3) ... [2019-11-20 02:19:56,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d6ddb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:19:56, skipping insertion in model container [2019-11-20 02:19:56,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:19:56" (3/3) ... [2019-11-20 02:19:56,467 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrlen_unsafe.i [2019-11-20 02:19:56,478 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:19:56,487 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-11-20 02:19:56,510 INFO L249 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-11-20 02:19:56,532 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:19:56,532 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 02:19:56,533 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:19:56,533 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:19:56,533 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:19:56,533 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:19:56,533 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:19:56,534 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:19:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-11-20 02:19:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:19:56,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:19:56,568 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:19:56,568 INFO L410 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:19:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:19:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316378, now seen corresponding path program 1 times [2019-11-20 02:19:56,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:19:56,588 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [846559317] [2019-11-20 02:19:56,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 02:19:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:19:56,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:19:56,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:19:56,966 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 02:19:56,967 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:19:56,975 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:19:56,976 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:19:56,976 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 02:19:56,987 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 02:19:56,987 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:19:57,023 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 02:19:57,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [846559317] [2019-11-20 02:19:57,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:19:57,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 02:19:57,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142435273] [2019-11-20 02:19:57,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 02:19:57,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:19:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 02:19:57,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 02:19:57,049 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2019-11-20 02:19:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:19:57,149 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-20 02:19:57,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 02:19:57,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-20 02:19:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:19:57,161 INFO L225 Difference]: With dead ends: 41 [2019-11-20 02:19:57,161 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 02:19:57,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 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 02:19:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 02:19:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-20 02:19:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 02:19:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-20 02:19:57,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 11 [2019-11-20 02:19:57,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:19:57,199 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-20 02:19:57,200 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 02:19:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-20 02:19:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:19:57,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:19:57,200 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:19:57,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:57,401 INFO L410 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:19:57,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:19:57,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316379, now seen corresponding path program 1 times [2019-11-20 02:19:57,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:19:57,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [896432426] [2019-11-20 02:19:57,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 02:19:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:19:57,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:19:57,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:19:57,616 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 02:19:57,616 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:19:57,628 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:19:57,628 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:19:57,629 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2019-11-20 02:19:57,648 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 02:19:57,648 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:19:57,801 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 02:19:57,801 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [896432426] [2019-11-20 02:19:57,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:19:57,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 02:19:57,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739117944] [2019-11-20 02:19:57,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:19:57,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:19:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:19:57,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:19:57,804 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 6 states. [2019-11-20 02:19:58,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:19:58,075 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-20 02:19:58,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:19:58,077 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 02:19:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:19:58,080 INFO L225 Difference]: With dead ends: 47 [2019-11-20 02:19:58,080 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 02:19:58,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:19:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 02:19:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2019-11-20 02:19:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 02:19:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-20 02:19:58,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2019-11-20 02:19:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:19:58,089 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-20 02:19:58,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:19:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-20 02:19:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:19:58,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:19:58,090 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:19:58,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:58,291 INFO L410 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:19:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:19:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1978316432, now seen corresponding path program 1 times [2019-11-20 02:19:58,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:19:58,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1493486036] [2019-11-20 02:19:58,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/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 02:19:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:19:58,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 02:19:58,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:19:58,534 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 02:19:58,534 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:19:58,572 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 02:19:58,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1493486036] [2019-11-20 02:19:58,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:19:58,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 02:19:58,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772291397] [2019-11-20 02:19:58,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:19:58,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:19:58,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:19:58,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:19:58,575 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 6 states. [2019-11-20 02:19:58,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:19:58,677 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-11-20 02:19:58,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:19:58,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 02:19:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:19:58,681 INFO L225 Difference]: With dead ends: 43 [2019-11-20 02:19:58,681 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 02:19:58,682 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 02:19:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 02:19:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-11-20 02:19:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 02:19:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-20 02:19:58,695 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 11 [2019-11-20 02:19:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:19:58,696 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-20 02:19:58,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:19:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-20 02:19:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 02:19:58,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:19:58,697 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:19:58,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:58,900 INFO L410 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:19:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:19:58,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1978376014, now seen corresponding path program 1 times [2019-11-20 02:19:58,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:19:58,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1740020246] [2019-11-20 02:19:58,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:19:59,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 02:19:59,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:19:59,113 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 02:19:59,114 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:19:59,138 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:19:59,139 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:19:59,139 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2019-11-20 02:19:59,160 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 02:19:59,160 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:19:59,242 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 02:19:59,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740020246] [2019-11-20 02:19:59,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:19:59,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 02:19:59,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235745730] [2019-11-20 02:19:59,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 02:19:59,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:19:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 02:19:59,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 02:19:59,245 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2019-11-20 02:19:59,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:19:59,507 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-20 02:19:59,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:19:59,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 02:19:59,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:19:59,510 INFO L225 Difference]: With dead ends: 47 [2019-11-20 02:19:59,510 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 02:19:59,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:19:59,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 02:19:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2019-11-20 02:19:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 02:19:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-11-20 02:19:59,517 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2019-11-20 02:19:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:19:59,517 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-11-20 02:19:59,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 02:19:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-11-20 02:19:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 02:19:59,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:19:59,518 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:19:59,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:59,720 INFO L410 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:19:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:19:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1295904273, now seen corresponding path program 1 times [2019-11-20 02:19:59,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:19:59,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [305629162] [2019-11-20 02:19:59,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:19:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:19:59,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:19:59,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:19:59,958 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 02:19:59,959 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:19:59,977 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:19:59,977 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:19:59,978 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 02:20:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:00,103 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:20:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:00,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305629162] [2019-11-20 02:20:00,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:20:00,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 02:20:00,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501784122] [2019-11-20 02:20:00,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 02:20:00,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:20:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 02:20:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:20:00,665 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2019-11-20 02:20:00,975 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-20 02:20:01,718 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 02:20:02,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:20:02,028 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-11-20 02:20:02,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 02:20:02,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 02:20:02,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:20:02,031 INFO L225 Difference]: With dead ends: 61 [2019-11-20 02:20:02,031 INFO L226 Difference]: Without dead ends: 61 [2019-11-20 02:20:02,032 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:20:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-20 02:20:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2019-11-20 02:20:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-20 02:20:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2019-11-20 02:20:02,038 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 15 [2019-11-20 02:20:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:20:02,038 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2019-11-20 02:20:02,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 02:20:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2019-11-20 02:20:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 02:20:02,039 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:20:02,040 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:20:02,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:02,242 INFO L410 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:20:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:20:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash -77704130, now seen corresponding path program 1 times [2019-11-20 02:20:02,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:20:02,242 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [815291859] [2019-11-20 02:20:02,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:20:02,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:20:02,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:20:02,412 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 02:20:02,412 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:02,417 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:02,418 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:02,418 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 02:20:02,478 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 02:20:02,478 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:20:02,556 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 02:20:02,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815291859] [2019-11-20 02:20:02,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:20:02,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-20 02:20:02,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762898344] [2019-11-20 02:20:02,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 02:20:02,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:20:02,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 02:20:02,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 02:20:02,558 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 8 states. [2019-11-20 02:20:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:20:02,719 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-20 02:20:02,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 02:20:02,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 02:20:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:20:02,721 INFO L225 Difference]: With dead ends: 47 [2019-11-20 02:20:02,721 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 02:20:02,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:20:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 02:20:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-20 02:20:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 02:20:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-20 02:20:02,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 18 [2019-11-20 02:20:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:20:02,727 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-20 02:20:02,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 02:20:02,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-20 02:20:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 02:20:02,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:20:02,729 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:20:02,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:02,931 INFO L410 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:20:02,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:20:02,932 INFO L82 PathProgramCache]: Analyzing trace with hash -77704129, now seen corresponding path program 1 times [2019-11-20 02:20:02,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:20:02,932 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [673962093] [2019-11-20 02:20:02,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:20:03,128 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 02:20:03,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:20:03,142 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 02:20:03,143 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:03,150 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:03,150 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:03,151 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 02:20:03,268 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 02:20:03,268 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:20:03,918 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 02:20:03,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [673962093] [2019-11-20 02:20:03,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:20:03,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 02:20:03,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71315665] [2019-11-20 02:20:03,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 02:20:03,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:20:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 02:20:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-20 02:20:03,920 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 16 states. [2019-11-20 02:20:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:20:04,973 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2019-11-20 02:20:04,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 02:20:04,974 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2019-11-20 02:20:04,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:20:04,975 INFO L225 Difference]: With dead ends: 73 [2019-11-20 02:20:04,975 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 02:20:04,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2019-11-20 02:20:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 02:20:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2019-11-20 02:20:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 02:20:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-11-20 02:20:04,983 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 18 [2019-11-20 02:20:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:20:04,983 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-11-20 02:20:04,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 02:20:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-11-20 02:20:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 02:20:04,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:20:04,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:20:05,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:05,185 INFO L410 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:20:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:20:05,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1659223880, now seen corresponding path program 1 times [2019-11-20 02:20:05,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:20:05,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [221642681] [2019-11-20 02:20:05,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:20:05,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 02:20:05,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:20:05,381 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 8 [2019-11-20 02:20:05,381 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,386 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:05,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 02:20:05,484 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2019-11-20 02:20:05,485 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,487 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:05,487 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,488 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-20 02:20:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:05,503 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:20:05,754 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2019-11-20 02:20:05,761 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-11-20 02:20:05,763 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,765 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:05,765 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,767 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:05,767 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:05,767 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:6 [2019-11-20 02:20:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:05,776 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [221642681] [2019-11-20 02:20:05,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:20:05,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 17 [2019-11-20 02:20:05,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132530851] [2019-11-20 02:20:05,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 02:20:05,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:20:05,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 02:20:05,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-11-20 02:20:05,777 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 17 states. [2019-11-20 02:20:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:20:06,282 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2019-11-20 02:20:06,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 02:20:06,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-11-20 02:20:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:20:06,283 INFO L225 Difference]: With dead ends: 67 [2019-11-20 02:20:06,283 INFO L226 Difference]: Without dead ends: 67 [2019-11-20 02:20:06,284 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2019-11-20 02:20:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-20 02:20:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-11-20 02:20:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 02:20:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2019-11-20 02:20:06,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 20 [2019-11-20 02:20:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:20:06,291 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2019-11-20 02:20:06,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 02:20:06,291 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2019-11-20 02:20:06,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 02:20:06,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:20:06,292 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:20:06,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:06,494 INFO L410 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:20:06,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:20:06,495 INFO L82 PathProgramCache]: Analyzing trace with hash 2048937402, now seen corresponding path program 1 times [2019-11-20 02:20:06,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:20:06,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [93477709] [2019-11-20 02:20:06,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:20:06,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 02:20:06,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:20:06,685 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 02:20:06,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:06,697 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:06,697 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:06,697 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 02:20:06,782 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2019-11-20 02:20:06,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:06,832 INFO L567 ElimStorePlain]: treesize reduction 20, result has 60.8 percent of original size [2019-11-20 02:20:06,832 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:06,832 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:31 [2019-11-20 02:20:07,277 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 02:20:07,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2019-11-20 02:20:07,280 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 02:20:07,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:07,298 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:07,298 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:23 [2019-11-20 02:20:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:07,370 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 02:20:08,724 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2019-11-20 02:20:08,754 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 02:20:08,755 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 02:20:08,824 INFO L567 ElimStorePlain]: treesize reduction 7, result has 80.0 percent of original size [2019-11-20 02:20:08,824 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:08,839 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 02:20:08,873 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 02:20:08,875 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 02:20:08,975 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2019-11-20 02:20:08,976 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 02:20:08,976 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:08,986 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 02:20:09,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 02:20:09,005 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 02:20:09,070 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 02:20:09,071 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 02:20:09,184 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 02:20:09,185 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 02:20:09,185 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 02:20:09,185 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:119, output treesize:89 [2019-11-20 02:20:09,945 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-20 02:20:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:20:09,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [93477709] [2019-11-20 02:20:09,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:20:09,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 22 [2019-11-20 02:20:09,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076294978] [2019-11-20 02:20:09,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 02:20:09,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 02:20:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:20:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:20:09,963 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 12 states. [2019-11-20 02:20:10,476 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-20 02:20:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:20:11,121 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2019-11-20 02:20:11,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 02:20:11,121 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-20 02:20:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:20:11,122 INFO L225 Difference]: With dead ends: 81 [2019-11-20 02:20:11,122 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 02:20:11,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2019-11-20 02:20:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 02:20:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2019-11-20 02:20:11,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 02:20:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2019-11-20 02:20:11,129 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 20 [2019-11-20 02:20:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:20:11,129 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2019-11-20 02:20:11,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 02:20:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2019-11-20 02:20:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 02:20:11,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:20:11,131 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:20:11,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:11,340 INFO L410 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 02:20:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:20:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash 863431255, now seen corresponding path program 1 times [2019-11-20 02:20:11,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 02:20:11,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2031688479] [2019-11-20 02:20:11,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:20:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:20:11,638 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 02:20:11,639 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 02:20:11,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 02:20:11,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:20:11 BoogieIcfgContainer [2019-11-20 02:20:11,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:20:11,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:20:11,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:20:11,877 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:20:11,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:19:56" (3/4) ... [2019-11-20 02:20:11,879 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 02:20:11,925 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e93eed66-8cfe-4d1e-99ae-3939f85e0af3/bin/uautomizer/witness.graphml [2019-11-20 02:20:11,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:20:11,926 INFO L168 Benchmark]: Toolchain (without parser) took 17089.17 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 231.2 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -222.5 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. [2019-11-20 02:20:11,927 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:20:11,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 675.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.5 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -231.0 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 02:20:11,928 INFO L168 Benchmark]: Boogie Preprocessor took 71.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:20:11,928 INFO L168 Benchmark]: RCFGBuilder took 863.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:20:11,929 INFO L168 Benchmark]: TraceAbstraction took 15422.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -48.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 02:20:11,929 INFO L168 Benchmark]: Witness Printer took 48.91 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-11-20 02:20:11,931 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 675.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.5 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -231.0 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 71.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 863.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15422.23 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -48.1 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 48.91 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 532]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L537] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) VAL [length=2] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L521] COND TRUE i < length - 1 VAL [i=0, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L523] nondetString[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=1, i=0, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L521] i++ VAL [i=1, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=1, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L526] nondetString[length-1] = '\0' VAL [i=1, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L527] return nondetString; VAL [\result={1:0}, i=1, length=2, malloc(length * sizeof(char))={1:0}, nondetString={1:0}] [L537] RET, EXPR build_nondet_String() VAL [build_nondet_String()={1:0}] [L537] char* p = build_nondet_String(); [L538] CALL cstrlen(p) VAL [s={1:0}] [L531] const char *p = s; VAL [p={1:0}, s={1:0}, s={1:0}] [L532] EXPR \read(*p) VAL [\read(*p)=1, p={1:0}, s={1:0}, s={1:0}] [L532] COND TRUE *p != '\0' [L533] p = p+2 VAL [p={1:2}, s={1:0}, s={1:0}] [L532] \read(*p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 58 locations, 10 error locations. Result: UNSAFE, OverallTime: 15.3s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 5.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 260 SDtfs, 346 SDslu, 992 SDs, 0 SdLazy, 866 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 288 GetRequests, 177 SyntacticMatches, 9 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=7, 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, 9 MinimizatonAttempts, 66 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 31160 SizeOfPredicates, 55 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 103 ConjunctsInUnsatCore, 18 InterpolantComputations, 15 PerfectInterpolantSequences, 3/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...