./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/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 e9f95b6c839057502038c8f9c89c369852ea0865 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:54:37,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:54:37,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:54:38,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:54:38,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:54:38,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:54:38,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:54:38,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:54:38,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:54:38,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:54:38,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:54:38,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:54:38,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:54:38,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:54:38,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:54:38,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:54:38,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:54:38,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:54:38,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:54:38,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:54:38,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:54:38,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:54:38,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:54:38,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:54:38,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:54:38,051 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:54:38,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:54:38,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:54:38,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:54:38,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:54:38,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:54:38,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:54:38,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:54:38,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:54:38,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:54:38,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:54:38,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:54:38,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:54:38,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:54:38,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:54:38,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:54:38,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:54:38,088 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:54:38,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:54:38,099 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:54:38,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:54:38,100 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:54:38,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:54:38,100 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:54:38,100 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:54:38,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:54:38,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:54:38,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:54:38,101 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:54:38,102 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:54:38,102 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:54:38,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:54:38,102 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:54:38,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:54:38,103 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:54:38,103 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:54:38,103 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:54:38,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:54:38,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:54:38,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:54:38,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:54:38,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:54:38,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:54:38,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:54:38,106 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:54:38,106 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:54:38,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:54:38,106 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/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 -> e9f95b6c839057502038c8f9c89c369852ea0865 [2019-11-25 08:54:38,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:54:38,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:54:38,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:54:38,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:54:38,300 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:54:38,302 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-11-25 08:54:38,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/data/e19cfcb33/a0beb9e77c37488a8ffea7a7a52b74a9/FLAGb5894e4e1 [2019-11-25 08:54:38,866 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:54:38,867 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2019-11-25 08:54:38,885 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/data/e19cfcb33/a0beb9e77c37488a8ffea7a7a52b74a9/FLAGb5894e4e1 [2019-11-25 08:54:39,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/data/e19cfcb33/a0beb9e77c37488a8ffea7a7a52b74a9 [2019-11-25 08:54:39,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:54:39,182 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:54:39,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:39,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:54:39,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:54:39,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e5762bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39, skipping insertion in model container [2019-11-25 08:54:39,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:54:39,246 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:54:39,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:39,618 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:54:39,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:54:39,725 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:54:39,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39 WrapperNode [2019-11-25 08:54:39,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:54:39,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:54:39,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:54:39,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:54:39,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... [2019-11-25 08:54:39,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:54:39,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:54:39,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:54:39,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:54:39,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:54:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:54:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:54:39,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:54:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:54:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:54:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-25 08:54:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-25 08:54:39,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-25 08:54:39,885 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2019-11-25 08:54:39,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:54:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:54:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:54:39,885 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:54:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:54:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:54:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:54:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:54:39,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:54:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:54:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:54:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:54:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:54:39,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:54:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:54:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:54:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:54:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:54:39,888 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:54:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:54:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-25 08:54:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-25 08:54:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-25 08:54:39,889 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:54:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:54:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:54:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:54:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:54:39,890 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:54:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:54:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:54:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:54:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:54:39,891 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:54:39,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:54:39,893 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:54:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:54:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:54:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:54:39,894 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:54:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:54:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:54:39,895 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:54:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:54:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:54:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:54:39,896 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:54:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:54:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:54:39,897 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:54:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:54:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:54:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:54:39,898 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:54:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:54:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:54:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:54:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:54:39,899 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:54:39,900 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:54:39,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:54:39,902 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:54:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:54:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:54:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:54:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:54:39,903 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:54:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:54:39,906 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:54:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:54:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:54:39,907 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:54:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:54:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-25 08:54:39,908 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:54:39,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:54:40,595 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:54:40,595 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-25 08:54:40,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:40 BoogieIcfgContainer [2019-11-25 08:54:40,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:54:40,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:54:40,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:54:40,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:54:40,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:54:39" (1/3) ... [2019-11-25 08:54:40,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a08cf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:40, skipping insertion in model container [2019-11-25 08:54:40,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:54:39" (2/3) ... [2019-11-25 08:54:40,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a08cf5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:54:40, skipping insertion in model container [2019-11-25 08:54:40,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:40" (3/3) ... [2019-11-25 08:54:40,607 INFO L109 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2019-11-25 08:54:40,617 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:54:40,631 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-11-25 08:54:40,644 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-11-25 08:54:40,667 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:54:40,667 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:54:40,667 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:54:40,668 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:54:40,668 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:54:40,668 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:54:40,668 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:54:40,668 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:54:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2019-11-25 08:54:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:54:40,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:40,709 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:40,710 INFO L410 AbstractCegarLoop]: === Iteration 1 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:40,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash -359318901, now seen corresponding path program 1 times [2019-11-25 08:54:40,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:40,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1959863182] [2019-11-25 08:54:40,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:40,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:54:41,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:41,089 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:41,090 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:41,090 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:41,100 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:41,102 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:41,102 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-25 08:54:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:41,119 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:41,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959863182] [2019-11-25 08:54:41,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:41,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:54:41,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443584141] [2019-11-25 08:54:41,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:54:41,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:41,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:54:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:54:41,155 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 3 states. [2019-11-25 08:54:41,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:41,249 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-11-25 08:54:41,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:54:41,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-25 08:54:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:41,258 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:54:41,258 INFO L226 Difference]: Without dead ends: 57 [2019-11-25 08:54:41,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:54:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-25 08:54:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-25 08:54:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-25 08:54:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-25 08:54:41,297 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 9 [2019-11-25 08:54:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:41,298 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-25 08:54:41,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:54:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-25 08:54:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:54:41,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:41,299 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:41,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:41,514 INFO L410 AbstractCegarLoop]: === Iteration 2 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:41,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:41,515 INFO L82 PathProgramCache]: Analyzing trace with hash -359318900, now seen corresponding path program 1 times [2019-11-25 08:54:41,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:41,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [916258516] [2019-11-25 08:54:41,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:41,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:54:41,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:41,739 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:41,740 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:41,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:41,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:41,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:41,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-25 08:54:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:41,777 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:41,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916258516] [2019-11-25 08:54:41,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:41,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-25 08:54:41,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210306067] [2019-11-25 08:54:41,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:54:41,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:54:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:54:41,867 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 6 states. [2019-11-25 08:54:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:42,240 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2019-11-25 08:54:42,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:54:42,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-25 08:54:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:42,244 INFO L225 Difference]: With dead ends: 157 [2019-11-25 08:54:42,244 INFO L226 Difference]: Without dead ends: 157 [2019-11-25 08:54:42,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-25 08:54:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 61. [2019-11-25 08:54:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-25 08:54:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-11-25 08:54:42,256 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 9 [2019-11-25 08:54:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:42,257 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-11-25 08:54:42,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:54:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-11-25 08:54:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:54:42,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:42,258 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:42,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:42,469 INFO L410 AbstractCegarLoop]: === Iteration 3 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:42,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1706358612, now seen corresponding path program 1 times [2019-11-25 08:54:42,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:42,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [33701727] [2019-11-25 08:54:42,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:42,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:42,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:42,735 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:42,736 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:42,736 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:42,749 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:42,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:42,750 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-25 08:54:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:42,780 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:42,927 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [33701727] [2019-11-25 08:54:42,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:42,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-25 08:54:42,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399524111] [2019-11-25 08:54:42,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:54:42,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:54:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:54:42,929 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 10 states. [2019-11-25 08:54:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:43,963 INFO L93 Difference]: Finished difference Result 357 states and 378 transitions. [2019-11-25 08:54:43,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:54:43,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-25 08:54:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:43,972 INFO L225 Difference]: With dead ends: 357 [2019-11-25 08:54:43,972 INFO L226 Difference]: Without dead ends: 357 [2019-11-25 08:54:43,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:54:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2019-11-25 08:54:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 65. [2019-11-25 08:54:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-25 08:54:44,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2019-11-25 08:54:44,002 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 11 [2019-11-25 08:54:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:44,002 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2019-11-25 08:54:44,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:54:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2019-11-25 08:54:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:54:44,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:44,003 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:44,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:44,206 INFO L410 AbstractCegarLoop]: === Iteration 4 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1374495294, now seen corresponding path program 1 times [2019-11-25 08:54:44,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:44,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [588334524] [2019-11-25 08:54:44,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:44,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:54:44,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:44,455 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_19|], 1=[|v_#valid_45|]} [2019-11-25 08:54:44,461 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:54:44,463 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:44,463 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:44,476 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:44,484 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:44,485 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:44,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:44,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:44,501 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-25 08:54:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:44,569 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:44,696 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:54:44,702 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:44,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:44,711 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:44,715 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:54:44,715 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:44,722 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:44,723 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:44,723 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:25, output treesize:5 [2019-11-25 08:54:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:44,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588334524] [2019-11-25 08:54:44,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:44,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:54:44,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943061134] [2019-11-25 08:54:44,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:54:44,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:54:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:44,749 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 8 states. [2019-11-25 08:54:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:45,691 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2019-11-25 08:54:45,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:54:45,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-25 08:54:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:45,698 INFO L225 Difference]: With dead ends: 172 [2019-11-25 08:54:45,698 INFO L226 Difference]: Without dead ends: 172 [2019-11-25 08:54:45,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:54:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-25 08:54:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 99. [2019-11-25 08:54:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-25 08:54:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2019-11-25 08:54:45,710 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 14 [2019-11-25 08:54:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:45,711 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2019-11-25 08:54:45,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:54:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2019-11-25 08:54:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-25 08:54:45,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:45,712 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:45,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:45,922 INFO L410 AbstractCegarLoop]: === Iteration 5 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1374495293, now seen corresponding path program 1 times [2019-11-25 08:54:45,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:45,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1272769363] [2019-11-25 08:54:45,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:46,075 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:54:46,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:46,090 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:46,090 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:46,091 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,098 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:46,099 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,099 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:11 [2019-11-25 08:54:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:46,115 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:46,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1272769363] [2019-11-25 08:54:46,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:54:46,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:54:46,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760245914] [2019-11-25 08:54:46,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:54:46,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:54:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:46,139 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand 5 states. [2019-11-25 08:54:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:46,213 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2019-11-25 08:54:46,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:54:46,214 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-25 08:54:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:46,215 INFO L225 Difference]: With dead ends: 96 [2019-11-25 08:54:46,215 INFO L226 Difference]: Without dead ends: 96 [2019-11-25 08:54:46,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:54:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-25 08:54:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-11-25 08:54:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-25 08:54:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2019-11-25 08:54:46,222 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 14 [2019-11-25 08:54:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:46,223 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2019-11-25 08:54:46,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:54:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2019-11-25 08:54:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:54:46,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:46,224 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:46,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:46,424 INFO L410 AbstractCegarLoop]: === Iteration 6 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash -398252002, now seen corresponding path program 1 times [2019-11-25 08:54:46,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:46,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1850302927] [2019-11-25 08:54:46,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:46,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:54:46,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:46,655 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_55|]} [2019-11-25 08:54:46,659 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:54:46,660 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:46,660 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,668 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:46,673 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:46,673 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,681 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:46,681 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:46,682 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-25 08:54:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:46,734 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:46,876 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:54:46,892 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:46,892 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,899 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:46,901 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:54:46,901 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,907 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:46,908 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:46,908 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:25, output treesize:5 [2019-11-25 08:54:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:47,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1850302927] [2019-11-25 08:54:47,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:47,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-25 08:54:47,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049161721] [2019-11-25 08:54:47,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:54:47,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:54:47,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:47,003 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand 12 states. [2019-11-25 08:54:48,108 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-11-25 08:54:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:49,611 INFO L93 Difference]: Finished difference Result 388 states and 418 transitions. [2019-11-25 08:54:49,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-25 08:54:49,612 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-11-25 08:54:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:49,615 INFO L225 Difference]: With dead ends: 388 [2019-11-25 08:54:49,615 INFO L226 Difference]: Without dead ends: 388 [2019-11-25 08:54:49,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:54:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2019-11-25 08:54:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 114. [2019-11-25 08:54:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-25 08:54:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2019-11-25 08:54:49,629 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 16 [2019-11-25 08:54:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:49,630 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2019-11-25 08:54:49,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:54:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2019-11-25 08:54:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:54:49,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:49,631 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:49,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:49,842 INFO L410 AbstractCegarLoop]: === Iteration 7 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1504152812, now seen corresponding path program 2 times [2019-11-25 08:54:49,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:49,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1853459492] [2019-11-25 08:54:49,843 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:50,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:54:50,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:54:50,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:54:50,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:50,148 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:54:50,148 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:50,149 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:50,154 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:50,155 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:50,155 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-25 08:54:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:50,178 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:50,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853459492] [2019-11-25 08:54:50,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-11-25 08:54:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617053184] [2019-11-25 08:54:50,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:54:50,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:54:50,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:54:50,473 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand 18 states. [2019-11-25 08:54:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:53,588 INFO L93 Difference]: Finished difference Result 720 states and 769 transitions. [2019-11-25 08:54:53,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-25 08:54:53,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-11-25 08:54:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:53,593 INFO L225 Difference]: With dead ends: 720 [2019-11-25 08:54:53,593 INFO L226 Difference]: Without dead ends: 720 [2019-11-25 08:54:53,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=463, Invalid=1019, Unknown=0, NotChecked=0, Total=1482 [2019-11-25 08:54:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2019-11-25 08:54:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 124. [2019-11-25 08:54:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-25 08:54:53,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2019-11-25 08:54:53,607 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 15 [2019-11-25 08:54:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:53,608 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2019-11-25 08:54:53,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:54:53,608 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2019-11-25 08:54:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:54:53,609 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:53,609 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:53,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:53,812 INFO L410 AbstractCegarLoop]: === Iteration 8 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:53,812 INFO L82 PathProgramCache]: Analyzing trace with hash -628858935, now seen corresponding path program 1 times [2019-11-25 08:54:53,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:53,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1875840008] [2019-11-25 08:54:53,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:53,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:54:53,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:53,983 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:54,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1875840008] [2019-11-25 08:54:54,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:54,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-25 08:54:54,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79937451] [2019-11-25 08:54:54,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:54:54,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:54:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:54,021 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand 8 states. [2019-11-25 08:54:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:54,138 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2019-11-25 08:54:54,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:54:54,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-25 08:54:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:54,139 INFO L225 Difference]: With dead ends: 150 [2019-11-25 08:54:54,140 INFO L226 Difference]: Without dead ends: 150 [2019-11-25 08:54:54,140 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-25 08:54:54,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2019-11-25 08:54:54,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-25 08:54:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 155 transitions. [2019-11-25 08:54:54,146 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 155 transitions. Word has length 17 [2019-11-25 08:54:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:54,147 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 155 transitions. [2019-11-25 08:54:54,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:54:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 155 transitions. [2019-11-25 08:54:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-25 08:54:54,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:54,148 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:54,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:54,350 INFO L410 AbstractCegarLoop]: === Iteration 9 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:54,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1039410871, now seen corresponding path program 1 times [2019-11-25 08:54:54,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:54,351 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [93930512] [2019-11-25 08:54:54,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:54,504 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:54:54,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:54,519 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:54,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [93930512] [2019-11-25 08:54:54,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:54,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-25 08:54:54,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648132598] [2019-11-25 08:54:54,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:54:54,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:54,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:54:54,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:54:54,552 INFO L87 Difference]: Start difference. First operand 123 states and 155 transitions. Second operand 8 states. [2019-11-25 08:54:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:54,823 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2019-11-25 08:54:54,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:54:54,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-25 08:54:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:54,828 INFO L225 Difference]: With dead ends: 215 [2019-11-25 08:54:54,828 INFO L226 Difference]: Without dead ends: 215 [2019-11-25 08:54:54,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:54:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-11-25 08:54:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 143. [2019-11-25 08:54:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-25 08:54:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 179 transitions. [2019-11-25 08:54:54,836 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 179 transitions. Word has length 17 [2019-11-25 08:54:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:54,836 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 179 transitions. [2019-11-25 08:54:54,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:54:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 179 transitions. [2019-11-25 08:54:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:54:54,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:54,837 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:55,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:55,048 INFO L410 AbstractCegarLoop]: === Iteration 10 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:55,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:55,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2136404678, now seen corresponding path program 1 times [2019-11-25 08:54:55,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:55,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [965040224] [2019-11-25 08:54:55,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:54:55,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:54:55,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:54:55,255 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_72|]} [2019-11-25 08:54:55,260 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:54:55,261 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:54:55,261 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:55,273 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:55,279 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:55,279 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:55,294 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:55,295 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:54:55,295 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:18 [2019-11-25 08:54:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:55,381 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:54:55,716 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-25 08:54:55,724 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:54:55,724 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:55,748 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:55,749 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-25 08:54:55,750 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:54:55,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:54:55,761 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:54:55,761 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:12 [2019-11-25 08:54:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:54:55,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965040224] [2019-11-25 08:54:55,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:54:55,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2019-11-25 08:54:55,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381278855] [2019-11-25 08:54:55,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:54:55,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:54:55,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:54:55,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:54:55,862 INFO L87 Difference]: Start difference. First operand 143 states and 179 transitions. Second operand 13 states. [2019-11-25 08:54:56,776 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-25 08:54:57,342 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-25 08:54:57,863 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-25 08:54:59,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:54:59,629 INFO L93 Difference]: Finished difference Result 300 states and 332 transitions. [2019-11-25 08:54:59,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:54:59,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 18 [2019-11-25 08:54:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:54:59,635 INFO L225 Difference]: With dead ends: 300 [2019-11-25 08:54:59,635 INFO L226 Difference]: Without dead ends: 300 [2019-11-25 08:54:59,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-11-25 08:54:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-25 08:54:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 169. [2019-11-25 08:54:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-25 08:54:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 213 transitions. [2019-11-25 08:54:59,643 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 213 transitions. Word has length 18 [2019-11-25 08:54:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:54:59,643 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 213 transitions. [2019-11-25 08:54:59,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:54:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 213 transitions. [2019-11-25 08:54:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:54:59,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:54:59,646 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:54:59,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:54:59,849 INFO L410 AbstractCegarLoop]: === Iteration 11 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:54:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:54:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 256855006, now seen corresponding path program 2 times [2019-11-25 08:54:59,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:54:59,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1736666838] [2019-11-25 08:54:59,850 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:00,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:55:00,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:55:00,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:55:00,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:00,042 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_77|]} [2019-11-25 08:55:00,051 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:55:00,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2019-11-25 08:55:00,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:55:00,068 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:55:00,074 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-25 08:55:00,074 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:55:00,093 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:55:00,094 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:55:00,094 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:25 [2019-11-25 08:55:00,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-25 08:55:00,153 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:55:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-25 08:55:00,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736666838] [2019-11-25 08:55:00,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:00,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:55:00,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473221217] [2019-11-25 08:55:00,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:55:00,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:55:00,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:55:00,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:55:00,332 INFO L87 Difference]: Start difference. First operand 169 states and 213 transitions. Second operand 8 states. [2019-11-25 08:55:00,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:00,692 INFO L93 Difference]: Finished difference Result 189 states and 242 transitions. [2019-11-25 08:55:00,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:55:00,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-25 08:55:00,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:00,694 INFO L225 Difference]: With dead ends: 189 [2019-11-25 08:55:00,694 INFO L226 Difference]: Without dead ends: 189 [2019-11-25 08:55:00,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:55:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-25 08:55:00,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 148. [2019-11-25 08:55:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-25 08:55:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 184 transitions. [2019-11-25 08:55:00,701 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 184 transitions. Word has length 20 [2019-11-25 08:55:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:00,701 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 184 transitions. [2019-11-25 08:55:00,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:55:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 184 transitions. [2019-11-25 08:55:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:55:00,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:00,703 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:00,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:00,905 INFO L410 AbstractCegarLoop]: === Iteration 12 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:55:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 996873614, now seen corresponding path program 1 times [2019-11-25 08:55:00,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:55:00,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [342799808] [2019-11-25 08:55:00,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:55:01,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:55:01,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:55:01,086 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-25 08:55:01,086 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-25 08:55:01,087 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:55:01,092 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:55:01,093 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:55:01,093 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:14 [2019-11-25 08:55:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:55:01,108 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:55:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:55:01,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342799808] [2019-11-25 08:55:01,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:55:01,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:55:01,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495418526] [2019-11-25 08:55:01,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:55:01,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:55:01,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:55:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:01,123 INFO L87 Difference]: Start difference. First operand 148 states and 184 transitions. Second operand 5 states. [2019-11-25 08:55:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:55:01,178 INFO L93 Difference]: Finished difference Result 146 states and 179 transitions. [2019-11-25 08:55:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:55:01,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-25 08:55:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:55:01,179 INFO L225 Difference]: With dead ends: 146 [2019-11-25 08:55:01,180 INFO L226 Difference]: Without dead ends: 146 [2019-11-25 08:55:01,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:55:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-25 08:55:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2019-11-25 08:55:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-25 08:55:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 179 transitions. [2019-11-25 08:55:01,185 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 179 transitions. Word has length 21 [2019-11-25 08:55:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:55:01,185 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 179 transitions. [2019-11-25 08:55:01,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:55:01,185 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 179 transitions. [2019-11-25 08:55:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-25 08:55:01,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:55:01,186 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:55:01,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:01,394 INFO L410 AbstractCegarLoop]: === Iteration 13 === [fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:55:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:55:01,395 INFO L82 PathProgramCache]: Analyzing trace with hash 996873615, now seen corresponding path program 1 times [2019-11-25 08:55:01,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:55:01,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [693980250] [2019-11-25 08:55:01,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:55:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:55:01,653 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:55:01,653 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:55:01,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:55:01,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:55:01 BoogieIcfgContainer [2019-11-25 08:55:01,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:55:01,892 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:55:01,892 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:55:01,893 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:55:01,893 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:54:40" (3/4) ... [2019-11-25 08:55:01,895 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:55:01,944 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_40697763-56f3-4065-9183-c1ce4afd966f/bin/uautomizer/witness.graphml [2019-11-25 08:55:01,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:55:01,946 INFO L168 Benchmark]: Toolchain (without parser) took 22763.81 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 356.5 MB). Free memory was 947.4 MB in the beginning and 1.0 GB in the end (delta: -61.4 MB). Peak memory consumption was 295.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,946 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:55:01,946 INFO L168 Benchmark]: CACSL2BoogieTranslator took 543.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 947.4 MB in the beginning and 1.2 GB in the end (delta: -227.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,947 INFO L168 Benchmark]: Boogie Preprocessor took 92.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,947 INFO L168 Benchmark]: RCFGBuilder took 777.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,948 INFO L168 Benchmark]: TraceAbstraction took 21295.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 161.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 94.8 MB). Peak memory consumption was 255.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,948 INFO L168 Benchmark]: Witness Printer took 52.29 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:55:01,950 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 543.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 947.4 MB in the beginning and 1.2 GB in the end (delta: -227.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 92.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 777.05 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21295.32 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 161.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 94.8 MB). Peak memory consumption was 255.7 MB. Max. memory is 11.5 GB. * Witness Printer took 52.29 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 533]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L512] int *a, *b; [L513] int n; VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=0] [L525] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L526] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L529] a = malloc(n * sizeof(*a)) [L530] b = malloc(n * sizeof(*b)) [L531] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L531] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L532] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, n=1] [L517] int i; [L518] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L518] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L519] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L518] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L518] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L520] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L520] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L532] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L533] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 21 error locations. Result: UNSAFE, OverallTime: 21.2s, OverallIterations: 13, TraceHistogramMax: 6, AutomataDifference: 12.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1068 SDtfs, 5757 SDslu, 4703 SDs, 0 SdLazy, 2759 SolverSat, 464 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 425 GetRequests, 268 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 1602 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 202 NumberOfCodeBlocks, 196 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 338 ConstructedInterpolants, 27 QuantifiedInterpolants, 33884 SizeOfPredicates, 58 NumberOfNonLiveVariables, 979 ConjunctsInSsa, 87 ConjunctsInUnsatCore, 24 InterpolantComputations, 12 PerfectInterpolantSequences, 46/110 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...