./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/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 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:39:49,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:39:49,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:39:49,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:39:49,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:39:49,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:39:49,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:39:49,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:39:49,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:39:49,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:39:49,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:39:49,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:39:49,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:39:49,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:39:49,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:39:49,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:39:49,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:39:50,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:39:50,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:39:50,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:39:50,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:39:50,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:39:50,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:39:50,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:39:50,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:39:50,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:39:50,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:39:50,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:39:50,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:39:50,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:39:50,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:39:50,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:39:50,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:39:50,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:39:50,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:39:50,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:39:50,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:39:50,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:39:50,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:39:50,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:39:50,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:39:50,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-12-01 15:39:50,085 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:39:50,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:39:50,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:39:50,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:39:50,088 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:39:50,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:39:50,088 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:39:50,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:39:50,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:39:50,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:39:50,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:39:50,090 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-01 15:39:50,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-01 15:39:50,091 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-01 15:39:50,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:39:50,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-01 15:39:50,092 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:39:50,092 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:39:50,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:39:50,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:39:50,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:39:50,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:39:50,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:39:50,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:39:50,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:39:50,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:39:50,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:39:50,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:39:50,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2020-12-01 15:39:50,336 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:39:50,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:39:50,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:39:50,364 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:39:50,364 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:39:50,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-01 15:39:50,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/data/437652497/35774b4291a64422b201a123cf17b2cf/FLAG0a5c74e28 [2020-12-01 15:39:51,122 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:39:51,123 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2020-12-01 15:39:51,150 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/data/437652497/35774b4291a64422b201a123cf17b2cf/FLAG0a5c74e28 [2020-12-01 15:39:51,399 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/data/437652497/35774b4291a64422b201a123cf17b2cf [2020-12-01 15:39:51,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:39:51,403 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-12-01 15:39:51,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:39:51,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:39:51,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:39:51,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1ebd2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51, skipping insertion in model container [2020-12-01 15:39:51,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:39:51,453 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:39:51,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:39:51,745 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:39:51,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:39:51,861 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:39:51,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51 WrapperNode [2020-12-01 15:39:51,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:39:51,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:39:51,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:39:51,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:39:51,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,912 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... [2020-12-01 15:39:51,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:39:51,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:39:51,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:39:51,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:39:51,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/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 [2020-12-01 15:39:52,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-12-01 15:39:52,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:39:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-12-01 15:39:52,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-12-01 15:39:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-12-01 15:39:52,061 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-12-01 15:39:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-12-01 15:39:52,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-12-01 15:39:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-12-01 15:39:52,062 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-12-01 15:39:52,063 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-12-01 15:39:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-12-01 15:39:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-12-01 15:39:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-12-01 15:39:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-12-01 15:39:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-12-01 15:39:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-12-01 15:39:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-12-01 15:39:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-12-01 15:39:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-12-01 15:39:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-12-01 15:39:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-12-01 15:39:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-12-01 15:39:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-12-01 15:39:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-12-01 15:39:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-12-01 15:39:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-12-01 15:39:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-12-01 15:39:52,069 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-12-01 15:39:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-12-01 15:39:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-12-01 15:39:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-12-01 15:39:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-12-01 15:39:52,070 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-12-01 15:39:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-12-01 15:39:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-12-01 15:39:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-12-01 15:39:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-12-01 15:39:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-12-01 15:39:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-12-01 15:39:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-12-01 15:39:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-12-01 15:39:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-12-01 15:39:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-12-01 15:39:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-12-01 15:39:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-12-01 15:39:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-12-01 15:39:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-12-01 15:39:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-12-01 15:39:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-12-01 15:39:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-12-01 15:39:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-12-01 15:39:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-12-01 15:39:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-12-01 15:39:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-12-01 15:39:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-12-01 15:39:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-12-01 15:39:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-12-01 15:39:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-12-01 15:39:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-12-01 15:39:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-12-01 15:39:52,078 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-12-01 15:39:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-12-01 15:39:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-12-01 15:39:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-12-01 15:39:52,079 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-12-01 15:39:52,080 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-12-01 15:39:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-12-01 15:39:52,081 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-12-01 15:39:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-12-01 15:39:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-12-01 15:39:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-12-01 15:39:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-12-01 15:39:52,082 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-12-01 15:39:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-12-01 15:39:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-12-01 15:39:52,083 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-12-01 15:39:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-12-01 15:39:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-12-01 15:39:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-12-01 15:39:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-12-01 15:39:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-12-01 15:39:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-12-01 15:39:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-12-01 15:39:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-12-01 15:39:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-12-01 15:39:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-12-01 15:39:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-12-01 15:39:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-12-01 15:39:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:39:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:39:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:39:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-12-01 15:39:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:39:52,720 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:39:52,721 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-12-01 15:39:52,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:39:52 BoogieIcfgContainer [2020-12-01 15:39:52,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:39:52,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:39:52,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:39:52,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:39:52,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:39:51" (1/3) ... [2020-12-01 15:39:52,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d13be4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:39:52, skipping insertion in model container [2020-12-01 15:39:52,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:39:51" (2/3) ... [2020-12-01 15:39:52,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d13be4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:39:52, skipping insertion in model container [2020-12-01 15:39:52,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:39:52" (3/3) ... [2020-12-01 15:39:52,737 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2020-12-01 15:39:52,752 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:39:52,756 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 23 error locations. [2020-12-01 15:39:52,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2020-12-01 15:39:52,797 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:39:52,797 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-01 15:39:52,797 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:39:52,798 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:39:52,805 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:39:52,805 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:39:52,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:39:52,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:39:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-12-01 15:39:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:39:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:52,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:52,838 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:52,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:52,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2020-12-01 15:39:52,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:52,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048096557] [2020-12-01 15:39:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048096557] [2020-12-01 15:39:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:39:53,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-01 15:39:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109718467] [2020-12-01 15:39:53,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:39:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:39:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:39:53,230 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 7 states. [2020-12-01 15:39:53,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:53,629 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2020-12-01 15:39:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:39:53,630 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-01 15:39:53,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:53,640 INFO L225 Difference]: With dead ends: 125 [2020-12-01 15:39:53,640 INFO L226 Difference]: Without dead ends: 121 [2020-12-01 15:39:53,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:39:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-01 15:39:53,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2020-12-01 15:39:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-01 15:39:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2020-12-01 15:39:53,680 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2020-12-01 15:39:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:53,680 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2020-12-01 15:39:53,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:39:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2020-12-01 15:39:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:39:53,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:53,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:53,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:39:53,681 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2020-12-01 15:39:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:53,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083256312] [2020-12-01 15:39:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:53,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083256312] [2020-12-01 15:39:53,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:39:53,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-01 15:39:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875364439] [2020-12-01 15:39:53,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:39:53,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:39:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:39:53,732 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 4 states. [2020-12-01 15:39:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:53,830 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-12-01 15:39:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-01 15:39:53,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-01 15:39:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:53,832 INFO L225 Difference]: With dead ends: 60 [2020-12-01 15:39:53,832 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:39:53,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:39:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:39:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-01 15:39:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-01 15:39:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-01 15:39:53,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2020-12-01 15:39:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:53,839 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-01 15:39:53,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:39:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-01 15:39:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-01 15:39:53,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:53,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:53,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:39:53,840 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2020-12-01 15:39:53,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:53,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185240195] [2020-12-01 15:39:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:53,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185240195] [2020-12-01 15:39:53,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:39:53,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:39:53,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384594213] [2020-12-01 15:39:53,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-01 15:39:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:39:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:39:53,926 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 6 states. [2020-12-01 15:39:54,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:54,066 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-12-01 15:39:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:39:54,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-01 15:39:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:54,068 INFO L225 Difference]: With dead ends: 64 [2020-12-01 15:39:54,068 INFO L226 Difference]: Without dead ends: 64 [2020-12-01 15:39:54,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:39:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-01 15:39:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-01 15:39:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-01 15:39:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2020-12-01 15:39:54,074 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2020-12-01 15:39:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:54,075 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2020-12-01 15:39:54,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-01 15:39:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2020-12-01 15:39:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:39:54,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:54,076 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:54,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:39:54,076 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2020-12-01 15:39:54,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:54,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785700975] [2020-12-01 15:39:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:54,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:39:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785700975] [2020-12-01 15:39:54,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:39:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-01 15:39:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238422067] [2020-12-01 15:39:54,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-01 15:39:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-01 15:39:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-01 15:39:54,145 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 4 states. [2020-12-01 15:39:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:54,269 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-12-01 15:39:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:39:54,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-01 15:39:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:54,271 INFO L225 Difference]: With dead ends: 60 [2020-12-01 15:39:54,271 INFO L226 Difference]: Without dead ends: 60 [2020-12-01 15:39:54,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:39:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-01 15:39:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-01 15:39:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-01 15:39:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-01 15:39:54,276 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2020-12-01 15:39:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:54,276 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-01 15:39:54,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-01 15:39:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-01 15:39:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:39:54,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:54,277 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:54,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-01 15:39:54,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2020-12-01 15:39:54,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:54,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030070907] [2020-12-01 15:39:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:54,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:54,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030070907] [2020-12-01 15:39:54,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164135956] [2020-12-01 15:39:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:39:54,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:39:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:54,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-01 15:39:54,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2020-12-01 15:39:54,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979175025] [2020-12-01 15:39:54,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:39:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:39:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:39:54,660 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 5 states. [2020-12-01 15:39:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:54,740 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-12-01 15:39:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:39:54,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-01 15:39:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:54,742 INFO L225 Difference]: With dead ends: 109 [2020-12-01 15:39:54,743 INFO L226 Difference]: Without dead ends: 109 [2020-12-01 15:39:54,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:39:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-01 15:39:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2020-12-01 15:39:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-01 15:39:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-12-01 15:39:54,749 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2020-12-01 15:39:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:54,765 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-12-01 15:39:54,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:39:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-12-01 15:39:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:39:54,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:54,766 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:54,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:54,985 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:54,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:54,986 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2020-12-01 15:39:54,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:54,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014400920] [2020-12-01 15:39:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:55,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014400920] [2020-12-01 15:39:55,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241511183] [2020-12-01 15:39:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:55,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-01 15:39:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:39:55,336 INFO L382 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 8 treesize of output 7 [2020-12-01 15:39:55,338 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:39:55,348 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:39:55,358 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:39:55,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:21 [2020-12-01 15:39:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:55,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:39:55,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2020-12-01 15:39:55,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520699781] [2020-12-01 15:39:55,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:39:55,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:39:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:39:55,431 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2020-12-01 15:39:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:55,828 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2020-12-01 15:39:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:39:55,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-01 15:39:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:55,832 INFO L225 Difference]: With dead ends: 123 [2020-12-01 15:39:55,832 INFO L226 Difference]: Without dead ends: 123 [2020-12-01 15:39:55,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:39:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-01 15:39:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-12-01 15:39:55,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-01 15:39:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-12-01 15:39:55,849 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2020-12-01 15:39:55,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:55,849 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-12-01 15:39:55,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:39:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-12-01 15:39:55,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-01 15:39:55,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:55,850 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:56,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:56,077 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2020-12-01 15:39:56,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:56,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214674767] [2020-12-01 15:39:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:56,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:56,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214674767] [2020-12-01 15:39:56,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900358433] [2020-12-01 15:39:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:39:56,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:39:56,359 INFO L382 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 8 treesize of output 7 [2020-12-01 15:39:56,360 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-01 15:39:56,366 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-01 15:39:56,367 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-01 15:39:56,368 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2020-12-01 15:39:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:56,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:39:56,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-01 15:39:56,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819548356] [2020-12-01 15:39:56,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:39:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:56,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:39:56,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:39:56,417 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 8 states. [2020-12-01 15:39:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:56,598 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-12-01 15:39:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:39:56,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-01 15:39:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:56,600 INFO L225 Difference]: With dead ends: 74 [2020-12-01 15:39:56,600 INFO L226 Difference]: Without dead ends: 74 [2020-12-01 15:39:56,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:39:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-01 15:39:56,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2020-12-01 15:39:56,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-01 15:39:56,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-12-01 15:39:56,613 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2020-12-01 15:39:56,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:56,613 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-12-01 15:39:56,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:39:56,614 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-12-01 15:39:56,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:39:56,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:56,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:56,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:56,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:56,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:56,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2020-12-01 15:39:56,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:56,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621494046] [2020-12-01 15:39:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:56,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:39:56,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621494046] [2020-12-01 15:39:56,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:39:56,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:39:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399888691] [2020-12-01 15:39:56,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:39:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:39:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:39:56,894 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 5 states. [2020-12-01 15:39:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:57,025 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2020-12-01 15:39:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:39:57,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-01 15:39:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:57,027 INFO L225 Difference]: With dead ends: 80 [2020-12-01 15:39:57,027 INFO L226 Difference]: Without dead ends: 80 [2020-12-01 15:39:57,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:39:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-01 15:39:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-12-01 15:39:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-01 15:39:57,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-12-01 15:39:57,031 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2020-12-01 15:39:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:57,032 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-12-01 15:39:57,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:39:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-12-01 15:39:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-01 15:39:57,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:57,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:57,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-01 15:39:57,033 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2020-12-01 15:39:57,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:57,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135824688] [2020-12-01 15:39:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:57,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-12-01 15:39:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135824688] [2020-12-01 15:39:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086440866] [2020-12-01 15:39:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:39:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:39:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:39:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:39:57,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:39:57,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2020-12-01 15:39:57,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19197025] [2020-12-01 15:39:57,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-01 15:39:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:39:57,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-01 15:39:57,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:39:57,385 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 10 states. [2020-12-01 15:39:57,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:39:57,627 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-12-01 15:39:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:39:57,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-01 15:39:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:39:57,628 INFO L225 Difference]: With dead ends: 81 [2020-12-01 15:39:57,629 INFO L226 Difference]: Without dead ends: 81 [2020-12-01 15:39:57,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:39:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-01 15:39:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2020-12-01 15:39:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-01 15:39:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2020-12-01 15:39:57,635 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 17 [2020-12-01 15:39:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:39:57,635 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2020-12-01 15:39:57,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-01 15:39:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2020-12-01 15:39:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-01 15:39:57,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:39:57,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:39:57,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:39:57,857 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr22ENSURES_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-12-01 15:39:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:39:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2020-12-01 15:39:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:39:57,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34526616] [2020-12-01 15:39:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:39:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:39:57,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:39:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:39:57,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:39:57,933 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:39:57,934 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:39:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-01 15:39:57,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:39:57 BoogieIcfgContainer [2020-12-01 15:39:57,966 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:39:57,966 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:39:57,966 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:39:57,966 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:39:57,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:39:52" (3/4) ... [2020-12-01 15:39:57,969 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:39:58,026 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_54501864-d085-4622-b735-e79214d3d1bb/bin/uautomizer/witness.graphml [2020-12-01 15:39:58,027 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:39:58,028 INFO L168 Benchmark]: Toolchain (without parser) took 6624.52 ms. Allocated memory was 102.8 MB in the beginning and 174.1 MB in the end (delta: 71.3 MB). Free memory was 75.6 MB in the beginning and 96.3 MB in the end (delta: -20.7 MB). Peak memory consumption was 50.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,028 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory was 59.1 MB in the beginning and 59.0 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:39:58,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 460.20 ms. Allocated memory is still 102.8 MB. Free memory was 75.3 MB in the beginning and 68.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,034 INFO L168 Benchmark]: Boogie Preprocessor took 99.66 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 66.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,035 INFO L168 Benchmark]: RCFGBuilder took 751.96 ms. Allocated memory was 102.8 MB in the beginning and 138.4 MB in the end (delta: 35.7 MB). Free memory was 66.0 MB in the beginning and 100.7 MB in the end (delta: -34.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,035 INFO L168 Benchmark]: TraceAbstraction took 5240.01 ms. Allocated memory was 138.4 MB in the beginning and 174.1 MB in the end (delta: 35.7 MB). Free memory was 100.2 MB in the beginning and 98.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,035 INFO L168 Benchmark]: Witness Printer took 60.61 ms. Allocated memory is still 174.1 MB. Free memory was 98.4 MB in the beginning and 96.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:39:58,039 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 102.8 MB. Free memory was 59.1 MB in the beginning and 59.0 MB in the end (delta: 51.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 460.20 ms. Allocated memory is still 102.8 MB. Free memory was 75.3 MB in the beginning and 68.3 MB in the end (delta: 7.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 99.66 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 66.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 751.96 ms. Allocated memory was 102.8 MB in the beginning and 138.4 MB in the end (delta: 35.7 MB). Free memory was 66.0 MB in the beginning and 100.7 MB in the end (delta: -34.7 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5240.01 ms. Allocated memory was 138.4 MB in the beginning and 174.1 MB in the end (delta: 35.7 MB). Free memory was 100.2 MB in the beginning and 98.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 38.5 MB. Max. memory is 16.1 GB. * Witness Printer took 60.61 ms. Allocated memory is still 174.1 MB. Free memory was 98.4 MB in the beginning and 96.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i