./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y --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 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:24:34,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:24:34,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:24:34,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:24:34,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:24:34,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:24:34,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:24:35,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:24:35,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:24:35,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:24:35,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:24:35,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:24:35,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:24:35,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:24:35,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:24:35,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:24:35,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:24:35,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:24:35,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:24:35,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:24:35,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:24:35,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:24:35,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:24:35,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:24:35,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:24:35,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:24:35,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:24:35,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:24:35,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:24:35,075 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:24:35,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:24:35,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:24:35,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:24:35,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:24:35,084 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:24:35,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:24:35,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:24:35,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:24:35,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:24:35,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:24:35,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:24:35,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:24:35,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:24:35,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:24:35,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:24:35,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:24:35,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:24:35,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:24:35,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:24:35,154 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:24:35,154 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:24:35,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:24:35,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:24:35,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:24:35,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:24:35,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:24:35,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:24:35,158 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:24:35,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:24:35,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:24:35,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:24:35,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:24:35,159 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:24:35,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:24:35,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:24:35,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:24:35,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:24:35,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:24:35,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:24:35,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:24:35,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:24:35,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:24:35,165 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:24:35,165 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_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a [2021-11-13 18:24:35,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:24:35,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:24:35,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:24:35,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:24:35,584 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:24:35,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-11-13 18:24:35,669 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/data/7b730fd6f/af04c84fbede405484eea51eb6cd900d/FLAGa775933f5 [2021-11-13 18:24:36,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:24:36,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-11-13 18:24:36,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/data/7b730fd6f/af04c84fbede405484eea51eb6cd900d/FLAGa775933f5 [2021-11-13 18:24:36,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/data/7b730fd6f/af04c84fbede405484eea51eb6cd900d [2021-11-13 18:24:36,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:24:36,721 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:24:36,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:36,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:24:36,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:24:36,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:36" (1/1) ... [2021-11-13 18:24:36,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56241225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:36, skipping insertion in model container [2021-11-13 18:24:36,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:24:36" (1/1) ... [2021-11-13 18:24:36,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:24:36,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:24:37,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:37,190 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:24:37,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:24:37,295 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:24:37,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37 WrapperNode [2021-11-13 18:24:37,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:24:37,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:24:37,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:24:37,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:24:37,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:24:37,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:24:37,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:24:37,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:24:37,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (1/1) ... [2021-11-13 18:24:37,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:24:37,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:37,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:24:37,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:24:37,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:24:37,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:24:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:24:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:24:37,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:24:37,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:24:37,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:24:37,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:24:37,480 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-11-13 18:24:37,481 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:24:37,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:24:37,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:24:37,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:24:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:24:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:24:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:24:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:24:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:24:37,487 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:24:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:24:37,488 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:24:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:24:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:24:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:24:37,489 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:24:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:24:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:24:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:24:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:24:37,490 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:24:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:24:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:24:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:24:37,493 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:24:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:24:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:24:37,495 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:24:37,496 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:24:37,497 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:24:37,497 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:24:37,498 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:24:37,499 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:24:37,500 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:24:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:24:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:24:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:24:37,501 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:24:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:24:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:24:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:24:37,502 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:24:37,503 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:24:37,504 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:24:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:24:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:24:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-13 18:24:37,505 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-11-13 18:24:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:24:37,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:24:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:24:37,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:24:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:24:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:24:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:24:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:24:38,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:24:38,229 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 18:24:38,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:38 BoogieIcfgContainer [2021-11-13 18:24:38,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:24:38,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:24:38,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:24:38,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:24:38,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:24:36" (1/3) ... [2021-11-13 18:24:38,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d09a211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:24:38, skipping insertion in model container [2021-11-13 18:24:38,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:24:37" (2/3) ... [2021-11-13 18:24:38,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d09a211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:24:38, skipping insertion in model container [2021-11-13 18:24:38,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:38" (3/3) ... [2021-11-13 18:24:38,250 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-11-13 18:24:38,257 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:24:38,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-13 18:24:38,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:24:38,348 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:24:38,348 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-13 18:24:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 18:24:38,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:38,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:38,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-11-13 18:24:38,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:38,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435900354] [2021-11-13 18:24:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:38,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:38,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:38,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:38,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435900354] [2021-11-13 18:24:38,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435900354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:38,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:38,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:38,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796019998] [2021-11-13 18:24:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:38,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:24:38,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:38,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:24:38,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:38,908 INFO L87 Difference]: Start difference. First operand has 62 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:39,145 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-13 18:24:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:24:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-13 18:24:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:39,160 INFO L225 Difference]: With dead ends: 62 [2021-11-13 18:24:39,160 INFO L226 Difference]: Without dead ends: 59 [2021-11-13 18:24:39,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:24:39,170 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 167.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:39,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 56 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 192.76ms Time] [2021-11-13 18:24:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-13 18:24:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-13 18:24:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 53 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-13 18:24:39,222 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-11-13 18:24:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:39,222 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-13 18:24:39,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-13 18:24:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:24:39,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:39,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:39,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:24:39,225 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-11-13 18:24:39,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:39,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92786137] [2021-11-13 18:24:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:39,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:39,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:39,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:39,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92786137] [2021-11-13 18:24:39,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92786137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:39,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:39,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:24:39,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250155517] [2021-11-13 18:24:39,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:39,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:24:39,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:39,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:24:39,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:24:39,441 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:39,780 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-11-13 18:24:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:24:39,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 18:24:39,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:39,784 INFO L225 Difference]: With dead ends: 111 [2021-11-13 18:24:39,784 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 18:24:39,784 INFO L932 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 [2021-11-13 18:24:39,786 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 83 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:39,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 124 Invalid, 111 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 249.33ms Time] [2021-11-13 18:24:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 18:24:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-11-13 18:24:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-11-13 18:24:39,800 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-11-13 18:24:39,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:39,800 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-11-13 18:24:39,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-11-13 18:24:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:24:39,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:39,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:39,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:24:39,802 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:39,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:39,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-11-13 18:24:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515602803] [2021-11-13 18:24:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:39,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:39,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:39,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515602803] [2021-11-13 18:24:39,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515602803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:39,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:39,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:24:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129862321] [2021-11-13 18:24:39,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:39,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:24:39,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:24:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:24:39,982 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:40,120 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-11-13 18:24:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:24:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-13 18:24:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:40,125 INFO L225 Difference]: With dead ends: 62 [2021-11-13 18:24:40,125 INFO L226 Difference]: Without dead ends: 62 [2021-11-13 18:24:40,126 INFO L932 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 [2021-11-13 18:24:40,137 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 17 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:40,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 78 Invalid, 86 Unknown, 0 Unchecked, 4.84ms Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 121.64ms Time] [2021-11-13 18:24:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-13 18:24:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-13 18:24:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-13 18:24:40,164 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-11-13 18:24:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-13 18:24:40,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-13 18:24:40,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:24:40,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:40,167 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:40,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:24:40,168 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-11-13 18:24:40,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:40,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919418541] [2021-11-13 18:24:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:40,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:40,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:40,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919418541] [2021-11-13 18:24:40,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919418541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:40,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909135717] [2021-11-13 18:24:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:40,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:40,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:40,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:24:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:24:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:40,606 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 18:24:40,607 INFO L388 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 17 treesize of output 18 [2021-11-13 18:24:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:40,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:24:40,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909135717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:40,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:24:40,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-13 18:24:40,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755960748] [2021-11-13 18:24:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:24:40,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:24:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:24:40,666 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:40,834 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-11-13 18:24:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:24:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-13 18:24:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:40,836 INFO L225 Difference]: With dead ends: 108 [2021-11-13 18:24:40,837 INFO L226 Difference]: Without dead ends: 108 [2021-11-13 18:24:40,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:24:40,839 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 104 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:40,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 225 Invalid, 62 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 126.08ms Time] [2021-11-13 18:24:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-13 18:24:40,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-11-13 18:24:40,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-11-13 18:24:40,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-11-13 18:24:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:40,848 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-11-13 18:24:40,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-11-13 18:24:40,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:24:40,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:40,849 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:40,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:41,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:41,075 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-11-13 18:24:41,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:41,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212966659] [2021-11-13 18:24:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:41,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:41,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:41,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212966659] [2021-11-13 18:24:41,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212966659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:41,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:41,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:24:41,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901917583] [2021-11-13 18:24:41,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:41,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:24:41,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:24:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:24:41,227 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:41,416 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-13 18:24:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:24:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-13 18:24:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:41,425 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:24:41,425 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 18:24:41,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:24:41,431 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.59ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:41,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 71 Invalid, 82 Unknown, 0 Unchecked, 3.59ms Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 124.97ms Time] [2021-11-13 18:24:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 18:24:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-13 18:24:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-11-13 18:24:41,443 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-11-13 18:24:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:41,443 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-11-13 18:24:41,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:41,444 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-11-13 18:24:41,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:24:41,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:41,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:41,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:24:41,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:41,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-11-13 18:24:41,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:41,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463206483] [2021-11-13 18:24:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:41,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:41,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:41,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463206483] [2021-11-13 18:24:41,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463206483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:41,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:24:41,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760975320] [2021-11-13 18:24:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:24:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:24:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:24:41,687 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:42,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:42,036 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-13 18:24:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:24:42,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-13 18:24:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:42,038 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:24:42,039 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 18:24:42,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:24:42,046 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 64 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.04ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:42,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 164 Invalid, 210 Unknown, 0 Unchecked, 8.04ms Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 225.89ms Time] [2021-11-13 18:24:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 18:24:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-11-13 18:24:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 66 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-11-13 18:24:42,056 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-11-13 18:24:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:42,057 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-11-13 18:24:42,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-11-13 18:24:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-13 18:24:42,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:42,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:42,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:24:42,066 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-11-13 18:24:42,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:42,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432593441] [2021-11-13 18:24:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:42,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:42,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432593441] [2021-11-13 18:24:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432593441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:42,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49292791] [2021-11-13 18:24:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:42,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:42,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:42,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:24:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:24:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:42,524 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 18:24:42,524 INFO L388 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 17 treesize of output 18 [2021-11-13 18:24:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:42,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:24:42,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49292791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:42,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:24:42,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-13 18:24:42,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208050031] [2021-11-13 18:24:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:42,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:24:42,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:24:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:24:42,715 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:42,889 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-13 18:24:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:24:42,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-13 18:24:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:42,891 INFO L225 Difference]: With dead ends: 104 [2021-11-13 18:24:42,891 INFO L226 Difference]: Without dead ends: 104 [2021-11-13 18:24:42,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:24:42,892 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 138 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.23ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 123.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:42,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 190 Invalid, 126 Unknown, 0 Unchecked, 3.23ms Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 123.17ms Time] [2021-11-13 18:24:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-13 18:24:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-11-13 18:24:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.4) internal successors, (70), 64 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-11-13 18:24:42,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-11-13 18:24:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:42,909 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-11-13 18:24:42,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-11-13 18:24:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:24:42,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:42,911 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:42,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:43,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:43,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-11-13 18:24:43,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:43,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232212910] [2021-11-13 18:24:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:43,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:43,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:43,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232212910] [2021-11-13 18:24:43,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232212910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:43,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891292937] [2021-11-13 18:24:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:43,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:43,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:43,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:43,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:24:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:43,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:24:43,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:43,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:24:43,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891292937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:43,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:24:43,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-13 18:24:43,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643201558] [2021-11-13 18:24:43,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:43,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:24:43,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:24:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:24:43,456 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:43,492 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-11-13 18:24:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:24:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-13 18:24:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:43,494 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:24:43,494 INFO L226 Difference]: Without dead ends: 97 [2021-11-13 18:24:43,498 INFO L932 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 [2021-11-13 18:24:43,500 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:43,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 121 Invalid, 34 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 28.83ms Time] [2021-11-13 18:24:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-13 18:24:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-11-13 18:24:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 63 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-13 18:24:43,522 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-11-13 18:24:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:43,522 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-13 18:24:43,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:43,523 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-13 18:24:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:24:43,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:43,524 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:43,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:43,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:43,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-11-13 18:24:43,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:43,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140463720] [2021-11-13 18:24:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:43,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:43,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:43,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:43,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140463720] [2021-11-13 18:24:43,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140463720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:24:43,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733946827] [2021-11-13 18:24:43,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:43,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:24:43,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:24:43,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:24:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:24:44,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:24:44,120 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 18:24:44,121 INFO L388 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 17 treesize of output 18 [2021-11-13 18:24:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:44,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:24:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:24:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733946827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:24:44,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:24:44,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-11-13 18:24:44,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885057724] [2021-11-13 18:24:44,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:24:44,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:24:44,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:24:44,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:24:44,524 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:45,440 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-11-13 18:24:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:24:45,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-13 18:24:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:45,444 INFO L225 Difference]: With dead ends: 112 [2021-11-13 18:24:45,444 INFO L226 Difference]: Without dead ends: 112 [2021-11-13 18:24:45,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:24:45,445 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 206 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.45ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 388.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:45,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 313 Invalid, 454 Unknown, 0 Unchecked, 7.45ms Time], IncrementalHoareTripleChecker [37 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 388.78ms Time] [2021-11-13 18:24:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-13 18:24:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-11-13 18:24:45,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-11-13 18:24:45,451 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-11-13 18:24:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:45,451 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-11-13 18:24:45,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:24:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-11-13 18:24:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:24:45,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:45,453 INFO L514 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] [2021-11-13 18:24:45,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:24:45,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:24:45,667 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-11-13 18:24:45,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:45,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328757954] [2021-11-13 18:24:45,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:45,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:45,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:24:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:45,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:24:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:24:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:24:45,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:24:45,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328757954] [2021-11-13 18:24:45,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328757954] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:24:45,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:24:45,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:24:45,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724461759] [2021-11-13 18:24:45,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:24:45,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:24:45,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:24:45,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:24:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:24:45,760 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:45,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:24:45,968 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-13 18:24:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:24:45,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-13 18:24:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:24:45,971 INFO L225 Difference]: With dead ends: 71 [2021-11-13 18:24:45,971 INFO L226 Difference]: Without dead ends: 71 [2021-11-13 18:24:45,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:24:45,972 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 91.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.38ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:24:45,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 126 Unknown, 0 Unchecked, 5.38ms Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 106.89ms Time] [2021-11-13 18:24:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-13 18:24:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-13 18:24:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 64 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 18:24:45,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-11-13 18:24:45,981 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-11-13 18:24:45,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:24:45,981 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-11-13 18:24:45,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:24:45,981 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-11-13 18:24:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:24:45,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:24:45,982 INFO L514 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] [2021-11-13 18:24:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:24:45,982 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-11-13 18:24:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:24:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-11-13 18:24:45,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:24:45,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703582458] [2021-11-13 18:24:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:24:45,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:24:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:46,012 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:24:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:24:46,062 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:24:46,062 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:24:46,063 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr3REQUIRES_VIOLATION (20 of 21 remaining) [2021-11-13 18:24:46,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (19 of 21 remaining) [2021-11-13 18:24:46,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (18 of 21 remaining) [2021-11-13 18:24:46,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (17 of 21 remaining) [2021-11-13 18:24:46,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (16 of 21 remaining) [2021-11-13 18:24:46,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE (15 of 21 remaining) [2021-11-13 18:24:46,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE (14 of 21 remaining) [2021-11-13 18:24:46,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE (13 of 21 remaining) [2021-11-13 18:24:46,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE (12 of 21 remaining) [2021-11-13 18:24:46,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2021-11-13 18:24:46,069 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2021-11-13 18:24:46,069 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2021-11-13 18:24:46,069 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2021-11-13 18:24:46,069 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2021-11-13 18:24:46,070 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2021-11-13 18:24:46,070 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2021-11-13 18:24:46,070 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK (4 of 21 remaining) [2021-11-13 18:24:46,070 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION (3 of 21 remaining) [2021-11-13 18:24:46,071 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION (2 of 21 remaining) [2021-11-13 18:24:46,071 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION (1 of 21 remaining) [2021-11-13 18:24:46,071 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION (0 of 21 remaining) [2021-11-13 18:24:46,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:24:46,075 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:24:46,080 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:24:46,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:24:46 BoogieIcfgContainer [2021-11-13 18:24:46,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:24:46,132 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:24:46,132 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:24:46,132 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:24:46,133 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:24:38" (3/4) ... [2021-11-13 18:24:46,135 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-13 18:24:46,183 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:24:46,184 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:24:46,185 INFO L158 Benchmark]: Toolchain (without parser) took 9463.87ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 74.5MB in the beginning and 44.2MB in the end (delta: 30.3MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,185 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 113.2MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:24:46,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 573.47ms. Allocated memory is still 113.2MB. Free memory was 74.3MB in the beginning and 82.5MB in the end (delta: -8.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,186 INFO L158 Benchmark]: Boogie Preprocessor took 68.03ms. Allocated memory is still 113.2MB. Free memory was 82.5MB in the beginning and 79.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,186 INFO L158 Benchmark]: RCFGBuilder took 866.13ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 59.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,187 INFO L158 Benchmark]: TraceAbstraction took 7897.48ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 58.8MB in the beginning and 46.3MB in the end (delta: 12.5MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,187 INFO L158 Benchmark]: Witness Printer took 51.84ms. Allocated memory is still 136.3MB. Free memory was 46.3MB in the beginning and 44.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:24:46,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 113.2MB. Free memory is still 92.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 573.47ms. Allocated memory is still 113.2MB. Free memory was 74.3MB in the beginning and 82.5MB in the end (delta: -8.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.03ms. Allocated memory is still 113.2MB. Free memory was 82.5MB in the beginning and 79.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 866.13ms. Allocated memory is still 113.2MB. Free memory was 79.8MB in the beginning and 59.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 7897.48ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 58.8MB in the beginning and 46.3MB in the end (delta: 12.5MB). Peak memory consumption was 38.0MB. Max. memory is 16.1GB. * Witness Printer took 51.84ms. Allocated memory is still 136.3MB. Free memory was 46.3MB in the beginning and 44.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=52, \old(a)=57, \old(b)=54, \old(b)=55, \old(n)=50, 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={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, b++={-1:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, 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={-2:0}, b={-1:4}, 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={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, 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={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, 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={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 530]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 7.7s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 765 SdHoareTripleChecker+Valid, 1688.33ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 758 mSDsluCounter, 1436 SdHoareTripleChecker+Invalid, 1401.11ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 879 mSDsCounter, 95 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1252 IncrementalHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 95 mSolverCounterUnsat, 557 mSDtfsCounter, 1252 mSolverCounterSat, 53.66ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, InterpolantAutomatonStates: 66, 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, 10 MinimizatonAttempts, 222 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 220 ConstructedInterpolants, 0 QuantifiedInterpolants, 1620 SizeOfPredicates, 9 NumberOfNonLiveVariables, 618 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 15 InterpolantComputations, 9 PerfectInterpolantSequences, 12/25 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! [2021-11-13 18:24:46,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98540f8b-6f92-4b93-96fd-744acedbcb0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)