./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/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 cbc7a588e1092d0916f2339b4d4b9e0fa8415335 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:57:49,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:57:49,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:57:49,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:57:49,813 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:57:49,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:57:49,816 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:57:49,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:57:49,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:57:49,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:57:49,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:57:49,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:57:49,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:57:49,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:57:49,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:57:49,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:57:49,831 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:57:49,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:57:49,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:57:49,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:57:49,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:57:49,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:57:49,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:57:49,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:57:49,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:57:49,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:57:49,848 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:57:49,849 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:57:49,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:57:49,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:57:49,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:57:49,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:57:49,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:57:49,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:57:49,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:57:49,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:57:49,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:57:49,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:57:49,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:57:49,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:57:49,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:57:49,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 02:57:49,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:57:49,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:57:49,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:57:49,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:57:49,884 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:57:49,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:57:49,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:57:49,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 02:57:49,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 02:57:49,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:57:49,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 02:57:49,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:57:49,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:57:49,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:57:49,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:57:49,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:57:49,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:57:49,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:49,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:57:49,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:57:49,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:57:49,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:57:49,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:57:49,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2020-11-28 02:57:50,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:57:50,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:57:50,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:57:50,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:57:50,146 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:57:50,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-11-28 02:57:50,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/data/ac609a671/36a86c9094e34410893afbc6835b20f8/FLAGa3270aac1 [2020-11-28 02:57:50,825 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:57:50,826 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-11-28 02:57:50,855 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/data/ac609a671/36a86c9094e34410893afbc6835b20f8/FLAGa3270aac1 [2020-11-28 02:57:51,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/data/ac609a671/36a86c9094e34410893afbc6835b20f8 [2020-11-28 02:57:51,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:57:51,174 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 02:57:51,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:51,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:57:51,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:57:51,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362c1faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51, skipping insertion in model container [2020-11-28 02:57:51,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:57:51,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:57:51,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:51,620 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:57:51,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:51,758 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:57:51,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51 WrapperNode [2020-11-28 02:57:51,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:51,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:57:51,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:57:51,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:57:51,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... [2020-11-28 02:57:51,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:57:51,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:57:51,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:57:51,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:57:51,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:51,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 02:57:51,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:57:51,939 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-28 02:57:51,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-28 02:57:51,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-28 02:57:51,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-28 02:57:51,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-28 02:57:51,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-28 02:57:51,941 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-28 02:57:51,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 02:57:51,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 02:57:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-28 02:57:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-28 02:57:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-28 02:57:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-28 02:57:51,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:57:51,945 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-28 02:57:51,946 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-28 02:57:51,947 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-28 02:57:51,948 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-28 02:57:51,949 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-28 02:57:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-28 02:57:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-28 02:57:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-28 02:57:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-28 02:57:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-28 02:57:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-28 02:57:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-28 02:57:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-28 02:57:51,954 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-28 02:57:51,954 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-28 02:57:51,954 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-28 02:57:51,954 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-28 02:57:51,954 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-28 02:57:51,955 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-28 02:57:51,955 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-28 02:57:51,955 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 02:57:51,956 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-28 02:57:51,957 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-28 02:57:51,958 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-28 02:57:51,958 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-28 02:57:51,958 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-28 02:57:51,959 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-28 02:57:51,960 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-28 02:57:51,961 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-28 02:57:51,962 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-28 02:57:51,963 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 02:57:51,964 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-28 02:57:51,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:57:51,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 02:57:51,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:57:51,965 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:57:51,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:57:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 02:57:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:57:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:57:52,687 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:57:52,687 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-28 02:57:52,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52 BoogieIcfgContainer [2020-11-28 02:57:52,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:57:52,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:57:52,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:57:52,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:57:52,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:57:51" (1/3) ... [2020-11-28 02:57:52,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a909d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:52, skipping insertion in model container [2020-11-28 02:57:52,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:51" (2/3) ... [2020-11-28 02:57:52,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a909d32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:52, skipping insertion in model container [2020-11-28 02:57:52,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52" (3/3) ... [2020-11-28 02:57:52,700 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2020-11-28 02:57:52,711 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:57:52,716 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-11-28 02:57:52,728 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-11-28 02:57:52,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:57:52,750 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 02:57:52,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:57:52,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:57:52,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:57:52,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:57:52,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:57:52,751 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:57:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-11-28 02:57:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 02:57:52,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:52,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:52,777 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -334073084, now seen corresponding path program 1 times [2020-11-28 02:57:52,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:52,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914381369] [2020-11-28 02:57:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914381369] [2020-11-28 02:57:53,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199104461] [2020-11-28 02:57:53,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:57:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:57:53,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:57:53,126 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-11-28 02:57:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:53,359 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-11-28 02:57:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:57:53,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 02:57:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:53,379 INFO L225 Difference]: With dead ends: 62 [2020-11-28 02:57:53,380 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 02:57:53,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:57:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 02:57:53,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-28 02:57:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 02:57:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-11-28 02:57:53,426 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-11-28 02:57:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:53,427 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-11-28 02:57:53,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:57:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-11-28 02:57:53,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:57:53,427 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:57:53,428 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545344, now seen corresponding path program 1 times [2020-11-28 02:57:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128193226] [2020-11-28 02:57:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128193226] [2020-11-28 02:57:53,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:53,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427356438] [2020-11-28 02:57:53,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:53,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:53,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:53,555 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-11-28 02:57:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:53,773 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-11-28 02:57:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:53,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-28 02:57:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:53,776 INFO L225 Difference]: With dead ends: 58 [2020-11-28 02:57:53,776 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 02:57:53,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 02:57:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-28 02:57:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 02:57:53,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-11-28 02:57:53,789 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 10 [2020-11-28 02:57:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:53,790 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-11-28 02:57:53,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-11-28 02:57:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 02:57:53,792 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:57:53,792 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545343, now seen corresponding path program 1 times [2020-11-28 02:57:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868934110] [2020-11-28 02:57:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868934110] [2020-11-28 02:57:53,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:53,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537046393] [2020-11-28 02:57:53,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:53,971 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2020-11-28 02:57:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,248 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-11-28 02:57:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:54,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-28 02:57:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,251 INFO L225 Difference]: With dead ends: 109 [2020-11-28 02:57:54,251 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 02:57:54,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:57:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 02:57:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-28 02:57:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-28 02:57:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-11-28 02:57:54,266 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2020-11-28 02:57:54,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,267 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-11-28 02:57:54,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-11-28 02:57:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 02:57:54,268 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:57:54,268 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421434, now seen corresponding path program 1 times [2020-11-28 02:57:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462531736] [2020-11-28 02:57:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:54,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462531736] [2020-11-28 02:57:54,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294190228] [2020-11-28 02:57:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:57:54,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:54,841 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-28 02:57:54,841 INFO L384 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 13 treesize of output 15 [2020-11-28 02:57:54,842 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:54,859 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:54,867 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:57:54,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2020-11-28 02:57:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:54,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:57:54,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-28 02:57:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253079994] [2020-11-28 02:57:54,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:57:54,922 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2020-11-28 02:57:55,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,061 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-11-28 02:57:55,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:55,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-28 02:57:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,064 INFO L225 Difference]: With dead ends: 108 [2020-11-28 02:57:55,064 INFO L226 Difference]: Without dead ends: 108 [2020-11-28 02:57:55,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-28 02:57:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2020-11-28 02:57:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-28 02:57:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-28 02:57:55,080 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2020-11-28 02:57:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,081 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-28 02:57:55,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-28 02:57:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:57:55,082 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,082 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:55,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:55,309 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:55,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:55,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184100, now seen corresponding path program 1 times [2020-11-28 02:57:55,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:55,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242285250] [2020-11-28 02:57:55,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:55,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242285250] [2020-11-28 02:57:55,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:55,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:57:55,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413541950] [2020-11-28 02:57:55,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:55,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:55,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:55,499 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-11-28 02:57:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,707 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-28 02:57:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:55,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-28 02:57:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,708 INFO L225 Difference]: With dead ends: 54 [2020-11-28 02:57:55,708 INFO L226 Difference]: Without dead ends: 54 [2020-11-28 02:57:55,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-28 02:57:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-28 02:57:55,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 02:57:55,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-11-28 02:57:55,714 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2020-11-28 02:57:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,714 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-11-28 02:57:55,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-11-28 02:57:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:57:55,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:55,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:57:55,716 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:55,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:55,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184099, now seen corresponding path program 1 times [2020-11-28 02:57:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:55,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818191424] [2020-11-28 02:57:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:55,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818191424] [2020-11-28 02:57:55,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:55,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:55,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77447936] [2020-11-28 02:57:55,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:55,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:55,876 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2020-11-28 02:57:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:56,275 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-11-28 02:57:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:57:56,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-28 02:57:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:56,277 INFO L225 Difference]: With dead ends: 99 [2020-11-28 02:57:56,277 INFO L226 Difference]: Without dead ends: 99 [2020-11-28 02:57:56,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-28 02:57:56,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-11-28 02:57:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 02:57:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-11-28 02:57:56,286 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2020-11-28 02:57:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:56,286 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-11-28 02:57:56,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-11-28 02:57:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:57:56,287 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:56,287 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:56,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:57:56,288 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 139066936, now seen corresponding path program 1 times [2020-11-28 02:57:56,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:56,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355598265] [2020-11-28 02:57:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355598265] [2020-11-28 02:57:56,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113252336] [2020-11-28 02:57:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 02:57:56,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:56,620 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-28 02:57:56,621 INFO L384 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 13 treesize of output 15 [2020-11-28 02:57:56,621 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:56,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:56,639 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:57:56,640 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-28 02:57:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:56,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:57:56,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-28 02:57:56,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652774157] [2020-11-28 02:57:56,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:56,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:57:56,724 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-11-28 02:57:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:56,958 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-11-28 02:57:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:57:56,959 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-28 02:57:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:56,960 INFO L225 Difference]: With dead ends: 104 [2020-11-28 02:57:56,960 INFO L226 Difference]: Without dead ends: 104 [2020-11-28 02:57:56,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:57:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-28 02:57:56,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-11-28 02:57:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 02:57:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-11-28 02:57:56,967 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2020-11-28 02:57:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:56,968 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-11-28 02:57:56,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-11-28 02:57:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 02:57:56,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:56,969 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:57,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:57,170 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2134408578, now seen corresponding path program 1 times [2020-11-28 02:57:57,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:57,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91448099] [2020-11-28 02:57:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:57,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91448099] [2020-11-28 02:57:57,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776001859] [2020-11-28 02:57:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:57,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:57:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:57,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:57:57,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-28 02:57:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032634579] [2020-11-28 02:57:57,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:57,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:57,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:57,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:57,569 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 5 states. [2020-11-28 02:57:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:57,629 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-11-28 02:57:57,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:57,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-28 02:57:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:57,631 INFO L225 Difference]: With dead ends: 97 [2020-11-28 02:57:57,631 INFO L226 Difference]: Without dead ends: 97 [2020-11-28 02:57:57,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:57:57,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-28 02:57:57,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-11-28 02:57:57,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-28 02:57:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-11-28 02:57:57,638 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2020-11-28 02:57:57,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:57,638 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-11-28 02:57:57,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-11-28 02:57:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 02:57:57,639 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:57,639 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:57,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:57,861 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:57,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:57,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1700324605, now seen corresponding path program 1 times [2020-11-28 02:57:57,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:57,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561479530] [2020-11-28 02:57:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:58,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561479530] [2020-11-28 02:57:58,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017692765] [2020-11-28 02:57:58,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 02:57:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:57:58,225 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-28 02:57:58,225 INFO L384 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 13 treesize of output 15 [2020-11-28 02:57:58,226 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:57:58,243 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:57:58,248 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:57:58,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-28 02:57:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:57:58,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:57:58,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-28 02:57:58,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338274048] [2020-11-28 02:57:58,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 02:57:58,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:58,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 02:57:58,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:57:58,360 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2020-11-28 02:57:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:59,060 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-11-28 02:57:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:57:59,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-28 02:57:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:59,063 INFO L225 Difference]: With dead ends: 112 [2020-11-28 02:57:59,063 INFO L226 Difference]: Without dead ends: 112 [2020-11-28 02:57:59,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-11-28 02:57:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-28 02:57:59,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-11-28 02:57:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-28 02:57:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-11-28 02:57:59,078 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2020-11-28 02:57:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:59,082 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-11-28 02:57:59,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 02:57:59,083 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-11-28 02:57:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 02:57:59,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:59,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:59,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:57:59,301 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:59,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash -247582013, now seen corresponding path program 1 times [2020-11-28 02:57:59,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:59,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848559233] [2020-11-28 02:57:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 02:57:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:59,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848559233] [2020-11-28 02:57:59,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:59,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:59,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767193723] [2020-11-28 02:57:59,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:59,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:59,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:59,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:59,406 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-11-28 02:57:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:59,745 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-28 02:57:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:57:59,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-28 02:57:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:59,747 INFO L225 Difference]: With dead ends: 71 [2020-11-28 02:57:59,747 INFO L226 Difference]: Without dead ends: 71 [2020-11-28 02:57:59,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:57:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-28 02:57:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-28 02:57:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 02:57:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-11-28 02:57:59,756 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2020-11-28 02:57:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:59,756 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-11-28 02:57:59,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:57:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-11-28 02:57:59,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 02:57:59,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:59,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:59,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 02:57:59,758 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:57:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:59,759 INFO L82 PathProgramCache]: Analyzing trace with hash -247582012, now seen corresponding path program 1 times [2020-11-28 02:57:59,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:59,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789827289] [2020-11-28 02:57:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:57:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 02:57:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:57:59,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789827289] [2020-11-28 02:57:59,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:59,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:59,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943287321] [2020-11-28 02:57:59,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 02:57:59,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:57:59,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:59,887 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 6 states. [2020-11-28 02:58:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:00,259 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-11-28 02:58:00,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:58:00,259 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-28 02:58:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:00,260 INFO L225 Difference]: With dead ends: 74 [2020-11-28 02:58:00,260 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 02:58:00,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-28 02:58:00,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 02:58:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-11-28 02:58:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-28 02:58:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-28 02:58:00,265 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2020-11-28 02:58:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:00,265 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-28 02:58:00,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 02:58:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-28 02:58:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 02:58:00,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:00,266 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:00,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 02:58:00,267 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:58:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:00,267 INFO L82 PathProgramCache]: Analyzing trace with hash 474007128, now seen corresponding path program 2 times [2020-11-28 02:58:00,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:00,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667392486] [2020-11-28 02:58:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:00,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667392486] [2020-11-28 02:58:00,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872989142] [2020-11-28 02:58:00,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:00,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 02:58:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:00,598 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-28 02:58:00,598 INFO L384 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 13 treesize of output 15 [2020-11-28 02:58:00,599 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:00,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:00,609 INFO L545 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. [2020-11-28 02:58:00,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-11-28 02:58:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 02:58:00,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:00,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2020-11-28 02:58:00,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898055010] [2020-11-28 02:58:00,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 02:58:00,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:00,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 02:58:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-28 02:58:00,741 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 13 states. [2020-11-28 02:58:01,077 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-28 02:58:01,291 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-11-28 02:58:01,860 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-11-28 02:58:02,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:02,488 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-11-28 02:58:02,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 02:58:02,489 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-11-28 02:58:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:02,490 INFO L225 Difference]: With dead ends: 120 [2020-11-28 02:58:02,490 INFO L226 Difference]: Without dead ends: 120 [2020-11-28 02:58:02,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-28 02:58:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-28 02:58:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2020-11-28 02:58:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 02:58:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-11-28 02:58:02,504 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 23 [2020-11-28 02:58:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:02,504 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-11-28 02:58:02,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 02:58:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-11-28 02:58:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 02:58:02,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:02,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:02,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-28 02:58:02,719 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:58:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1256876169, now seen corresponding path program 1 times [2020-11-28 02:58:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:02,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425097366] [2020-11-28 02:58:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-28 02:58:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 02:58:02,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425097366] [2020-11-28 02:58:02,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:58:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262398560] [2020-11-28 02:58:02,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:58:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:02,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:02,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:02,833 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-11-28 02:58:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:03,077 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-11-28 02:58:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:03,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-11-28 02:58:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:03,078 INFO L225 Difference]: With dead ends: 78 [2020-11-28 02:58:03,079 INFO L226 Difference]: Without dead ends: 78 [2020-11-28 02:58:03,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-28 02:58:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-28 02:58:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-28 02:58:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-28 02:58:03,087 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 25 [2020-11-28 02:58:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:03,087 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-28 02:58:03,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:58:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-28 02:58:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 02:58:03,090 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:03,091 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:03,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 02:58:03,091 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:58:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 254265955, now seen corresponding path program 1 times [2020-11-28 02:58:03,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:03,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474078023] [2020-11-28 02:58:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 02:58:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:58:03,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474078023] [2020-11-28 02:58:03,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947043440] [2020-11-28 02:58:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 02:58:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:03,457 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-28 02:58:03,458 INFO L384 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 13 treesize of output 15 [2020-11-28 02:58:03,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 02:58:03,472 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 02:58:03,475 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 02:58:03,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-11-28 02:58:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-28 02:58:03,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 02:58:03,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-11-28 02:58:03,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248104170] [2020-11-28 02:58:03,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 02:58:03,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:58:03,588 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 7 states. [2020-11-28 02:58:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:03,839 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-11-28 02:58:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:03,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-28 02:58:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:58:03,841 INFO L225 Difference]: With dead ends: 90 [2020-11-28 02:58:03,841 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 02:58:03,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-28 02:58:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 02:58:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-28 02:58:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-28 02:58:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-11-28 02:58:03,850 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 25 [2020-11-28 02:58:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:58:03,850 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-11-28 02:58:03,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 02:58:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-11-28 02:58:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 02:58:03,852 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:58:03,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:58:04,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:04,053 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, 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]=== [2020-11-28 02:58:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -972185287, now seen corresponding path program 1 times [2020-11-28 02:58:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:04,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187751734] [2020-11-28 02:58:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:04,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:04,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:04,111 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:04,111 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:58:04,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-28 02:58:04,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:58:04 BoogieIcfgContainer [2020-11-28 02:58:04,181 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:58:04,181 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:04,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:04,182 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:04,182 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:52" (3/4) ... [2020-11-28 02:58:04,184 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:58:04,242 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d6ec3b67-ea22-4168-9a67-ba4caa52dfca/bin/uautomizer/witness.graphml [2020-11-28 02:58:04,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:04,243 INFO L168 Benchmark]: Toolchain (without parser) took 13067.84 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 81.8 MB in the beginning and 140.6 MB in the end (delta: -58.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,243 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:04,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 583.59 ms. Allocated memory is still 109.1 MB. Free memory was 81.8 MB in the beginning and 74.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,244 INFO L168 Benchmark]: Boogie Preprocessor took 60.85 ms. Allocated memory is still 109.1 MB. Free memory was 74.7 MB in the beginning and 72.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,245 INFO L168 Benchmark]: RCFGBuilder took 868.36 ms. Allocated memory is still 109.1 MB. Free memory was 72.1 MB in the beginning and 63.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,245 INFO L168 Benchmark]: TraceAbstraction took 11488.29 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 63.4 MB in the beginning and 143.8 MB in the end (delta: -80.3 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,245 INFO L168 Benchmark]: Witness Printer took 60.51 ms. Allocated memory is still 192.9 MB. Free memory was 143.8 MB in the beginning and 140.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:04,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 44.1 MB in the beginning and 44.0 MB in the end (delta: 56.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 583.59 ms. Allocated memory is still 109.1 MB. Free memory was 81.8 MB in the beginning and 74.7 MB in the end (delta: 7.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.85 ms. Allocated memory is still 109.1 MB. Free memory was 74.7 MB in the beginning and 72.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 868.36 ms. Allocated memory is still 109.1 MB. Free memory was 72.1 MB in the beginning and 63.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11488.29 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 63.4 MB in the beginning and 143.8 MB in the end (delta: -80.3 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * Witness Printer took 60.51 ms. Allocated memory is still 192.9 MB. Free memory was 143.8 MB in the beginning and 140.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=56, \old(a)=53, \old(b)=50, \old(b)=57, \old(n)=55, a={0:0}, b={0:0}, n=0] [L536] 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] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] 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] [L542] *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] [L543] 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] [L528] int i; [L529] 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] [L529] 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] [L530] a[i] = -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] [L529] 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] [L529] 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] [L531] 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] [L531] 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] [L543] 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] [L544] b[-1] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b[-1]=0, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) 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] [L547] free(a) 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] [L547] free(a) [L547] free(b) 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] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.3s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 1231 SDslu, 955 SDs, 0 SdLazy, 1689 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=12, 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, 14 MinimizatonAttempts, 288 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 385 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 44965 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1011 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 12 PerfectInterpolantSequences, 34/55 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...