./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbc7a588e1092d0916f2339b4d4b9e0fa8415335 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:24:07,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:24:07,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:24:08,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:24:08,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:24:08,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:24:08,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:24:08,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:24:08,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:24:08,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:24:08,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:24:08,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:24:08,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:24:08,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:24:08,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:24:08,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:24:08,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:24:08,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:24:08,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:24:08,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:24:08,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:24:08,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:24:08,089 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:24:08,091 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:24:08,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:24:08,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:24:08,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:24:08,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:24:08,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:24:08,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:24:08,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:24:08,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:24:08,105 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:24:08,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:24:08,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:24:08,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:24:08,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:24:08,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:24:08,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:24:08,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:24:08,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:24:08,117 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:24:08,149 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:24:08,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:24:08,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:24:08,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:24:08,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:24:08,152 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:24:08,153 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:24:08,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:24:08,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:24:08,154 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:24:08,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:24:08,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:24:08,155 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:24:08,155 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:24:08,155 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:24:08,156 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:24:08,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:24:08,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:24:08,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:24:08,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:24:08,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:24:08,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:24:08,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:24:08,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:24:08,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:24:08,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:24:08,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:24:08,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:24:08,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:24:08,160 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_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2021-10-13 01:24:08,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:24:08,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:24:08,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:24:08,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:24:08,538 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:24:08,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-10-13 01:24:08,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/data/53d67b9f2/e029bdb53c8e4accb62c30c9abad5910/FLAG0eb0cb7ab [2021-10-13 01:24:09,263 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:24:09,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-10-13 01:24:09,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/data/53d67b9f2/e029bdb53c8e4accb62c30c9abad5910/FLAG0eb0cb7ab [2021-10-13 01:24:09,504 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/data/53d67b9f2/e029bdb53c8e4accb62c30c9abad5910 [2021-10-13 01:24:09,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:24:09,509 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:24:09,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:24:09,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:24:09,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:24:09,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:24:09" (1/1) ... [2021-10-13 01:24:09,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6801b52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:09, skipping insertion in model container [2021-10-13 01:24:09,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:24:09" (1/1) ... [2021-10-13 01:24:09,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:24:09,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:24:09,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:24:09,986 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:24:10,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:24:10,075 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:24:10,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10 WrapperNode [2021-10-13 01:24:10,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:24:10,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:24:10,078 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:24:10,078 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:24:10,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:24:10,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:24:10,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:24:10,150 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:24:10,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (1/1) ... [2021-10-13 01:24:10,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:24:10,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:10,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:24:10,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:24:10,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:24:10,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:24:10,268 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:24:10,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-13 01:24:10,269 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:24:10,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:24:10,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:24:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:24:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:24:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:24:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:24:10,272 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:24:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:24:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:24:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:24:10,273 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:24:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:24:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-13 01:24:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-13 01:24:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-13 01:24:10,274 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:24:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:24:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:24:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:24:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:24:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:24:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:24:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:24:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:24:10,277 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:24:10,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:24:10,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:24:10,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:24:10,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:24:10,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:24:10,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:24:10,278 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:24:10,278 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:24:10,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:24:10,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:24:10,279 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:24:10,279 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:24:10,280 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:24:10,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:24:10,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:24:10,280 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:24:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:24:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:24:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:24:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:24:10,281 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:24:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:24:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:24:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:24:10,282 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:24:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:24:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:24:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:24:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:24:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:24:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:24:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:24:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:24:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:24:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:24:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:24:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:24:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:24:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:24:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:24:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:24:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:24:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:24:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:24:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:24:10,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:24:10,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:24:10,288 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:24:10,289 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:24:10,289 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:24:10,289 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:24:10,289 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:24:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:24:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:24:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:24:10,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:24:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:24:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:24:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:24:10,291 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:24:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:24:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:24:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:24:10,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:24:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:24:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:24:10,293 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:24:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:24:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:24:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:24:10,294 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:24:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:24:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:24:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:24:10,295 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:24:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-13 01:24:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-13 01:24:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:24:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:24:10,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:24:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:24:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:24:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:24:10,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:24:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:24:10,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:24:10,904 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-13 01:24:10,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:24:10 BoogieIcfgContainer [2021-10-13 01:24:10,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:24:10,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:24:10,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:24:10,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:24:10,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:24:09" (1/3) ... [2021-10-13 01:24:10,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b13d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:24:10, skipping insertion in model container [2021-10-13 01:24:10,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:24:10" (2/3) ... [2021-10-13 01:24:10,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b13d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:24:10, skipping insertion in model container [2021-10-13 01:24:10,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:24:10" (3/3) ... [2021-10-13 01:24:10,919 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2021-10-13 01:24:10,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:24:10,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-10-13 01:24:10,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:24:10,993 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, mConcurrency=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 [2021-10-13 01:24:10,993 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-10-13 01:24:11,013 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) [2021-10-13 01:24:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 01:24:11,023 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:11,023 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:11,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-10-13 01:24:11,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:11,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699163504] [2021-10-13 01:24:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:11,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:11,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:11,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699163504] [2021-10-13 01:24:11,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699163504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:11,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:11,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:24:11,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592445033] [2021-10-13 01:24:11,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:24:11,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:24:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:24:11,412 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) [2021-10-13 01:24:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:11,671 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-13 01:24:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:24:11,674 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 [2021-10-13 01:24:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:11,686 INFO L225 Difference]: With dead ends: 62 [2021-10-13 01:24:11,686 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 01:24:11,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:24:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 01:24:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-13 01:24:11,743 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) [2021-10-13 01:24:11,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-13 01:24:11,749 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-10-13 01:24:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:11,750 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-13 01:24:11,751 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) [2021-10-13 01:24:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-13 01:24:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:24:11,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:11,754 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:11,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:24:11,754 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-10-13 01:24:11,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:11,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726666302] [2021-10-13 01:24:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:11,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:11,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:11,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:11,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726666302] [2021-10-13 01:24:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726666302] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:11,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:11,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:24:11,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182557968] [2021-10-13 01:24:11,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:24:11,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:24:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:24:11,998 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) [2021-10-13 01:24:12,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:12,356 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-13 01:24:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:24:12,357 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 [2021-10-13 01:24:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:12,366 INFO L225 Difference]: With dead ends: 111 [2021-10-13 01:24:12,366 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 01:24:12,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:24:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 01:24:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-10-13 01:24:12,386 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) [2021-10-13 01:24:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-13 01:24:12,394 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-10-13 01:24:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:12,395 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-13 01:24:12,395 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) [2021-10-13 01:24:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-13 01:24:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 01:24:12,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:12,396 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:12,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:24:12,397 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-10-13 01:24:12,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:12,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576073997] [2021-10-13 01:24:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:12,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:12,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:12,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576073997] [2021-10-13 01:24:12,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576073997] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:12,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:12,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:24:12,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471314117] [2021-10-13 01:24:12,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:24:12,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:12,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:24:12,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:24:12,573 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) [2021-10-13 01:24:12,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:12,739 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-10-13 01:24:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:24:12,740 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 [2021-10-13 01:24:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:12,741 INFO L225 Difference]: With dead ends: 62 [2021-10-13 01:24:12,742 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 01:24:12,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:24:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 01:24:12,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 01:24:12,748 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) [2021-10-13 01:24:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-13 01:24:12,750 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-10-13 01:24:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-13 01:24:12,751 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) [2021-10-13 01:24:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-13 01:24:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 01:24:12,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:12,753 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:12,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:24:12,754 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:12,755 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-10-13 01:24:12,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:12,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658480578] [2021-10-13 01:24:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:12,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:12,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:12,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:12,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658480578] [2021-10-13 01:24:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658480578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:12,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393411575] [2021-10-13 01:24:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:12,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:12,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:12,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:12,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:24:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:13,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:24:13,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:13,298 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:24:13,301 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 [2021-10-13 01:24:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393411575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:13,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:24:13,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-10-13 01:24:13,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417267023] [2021-10-13 01:24:13,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:24:13,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:13,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:24:13,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:24:13,407 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) [2021-10-13 01:24:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:13,544 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-13 01:24:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:24:13,545 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 [2021-10-13 01:24:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:13,547 INFO L225 Difference]: With dead ends: 108 [2021-10-13 01:24:13,547 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 01:24:13,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:24:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 01:24:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-10-13 01:24:13,554 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) [2021-10-13 01:24:13,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-13 01:24:13,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-10-13 01:24:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:13,556 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-13 01:24:13,557 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) [2021-10-13 01:24:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-13 01:24:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:24:13,558 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:13,558 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:13,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:13,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:13,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-10-13 01:24:13,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:13,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922256513] [2021-10-13 01:24:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:13,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:13,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:13,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:13,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922256513] [2021-10-13 01:24:13,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922256513] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:13,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:13,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:24:13,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066030799] [2021-10-13 01:24:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:24:13,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:24:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:24:13,961 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) [2021-10-13 01:24:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:14,129 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-13 01:24:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:24:14,131 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 [2021-10-13 01:24:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:14,135 INFO L225 Difference]: With dead ends: 54 [2021-10-13 01:24:14,136 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 01:24:14,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:24:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 01:24:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-13 01:24:14,152 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) [2021-10-13 01:24:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-10-13 01:24:14,154 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-10-13 01:24:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-10-13 01:24:14,155 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) [2021-10-13 01:24:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-10-13 01:24:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:24:14,156 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:14,156 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:14,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 01:24:14,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:14,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:14,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-10-13 01:24:14,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:14,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400140797] [2021-10-13 01:24:14,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:14,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:14,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:14,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:14,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400140797] [2021-10-13 01:24:14,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400140797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:14,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:14,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:24:14,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952046394] [2021-10-13 01:24:14,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:24:14,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:14,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:24:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:24:14,359 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) [2021-10-13 01:24:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:14,763 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-10-13 01:24:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:24:14,764 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 [2021-10-13 01:24:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:14,765 INFO L225 Difference]: With dead ends: 98 [2021-10-13 01:24:14,766 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 01:24:14,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:24:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 01:24:14,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-10-13 01:24:14,772 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) [2021-10-13 01:24:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-13 01:24:14,773 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-10-13 01:24:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:14,774 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-13 01:24:14,774 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) [2021-10-13 01:24:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-13 01:24:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 01:24:14,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:14,776 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:14,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:24:14,776 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-10-13 01:24:14,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:14,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294396401] [2021-10-13 01:24:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:14,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:14,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:14,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:14,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294396401] [2021-10-13 01:24:14,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294396401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:14,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192949648] [2021-10-13 01:24:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:14,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:14,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:14,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:14,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:24:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 01:24:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:15,250 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:24:15,250 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 [2021-10-13 01:24:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:15,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192949648] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:15,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:24:15,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-13 01:24:15,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78299252] [2021-10-13 01:24:15,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:24:15,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:15,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:24:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:24:15,473 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) [2021-10-13 01:24:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:15,690 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-13 01:24:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:24:15,691 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 [2021-10-13 01:24:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:15,692 INFO L225 Difference]: With dead ends: 104 [2021-10-13 01:24:15,692 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 01:24:15,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:24:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 01:24:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-10-13 01:24:15,705 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) [2021-10-13 01:24:15,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-13 01:24:15,710 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-10-13 01:24:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:15,711 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-13 01:24:15,711 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) [2021-10-13 01:24:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-13 01:24:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:24:15,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:15,713 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:15,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:15,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:15,914 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:15,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-10-13 01:24:15,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:15,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012795261] [2021-10-13 01:24:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:15,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:16,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:16,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012795261] [2021-10-13 01:24:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012795261] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056794940] [2021-10-13 01:24:16,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:16,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:16,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:16,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:16,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:24:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:24:16,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:16,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056794940] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:16,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:24:16,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-10-13 01:24:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948122498] [2021-10-13 01:24:16,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:24:16,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:24:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:24:16,354 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) [2021-10-13 01:24:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:16,417 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-10-13 01:24:16,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:24:16,420 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 [2021-10-13 01:24:16,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:16,421 INFO L225 Difference]: With dead ends: 97 [2021-10-13 01:24:16,423 INFO L226 Difference]: Without dead ends: 97 [2021-10-13 01:24:16,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:24:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-13 01:24:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-10-13 01:24:16,433 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) [2021-10-13 01:24:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-10-13 01:24:16,436 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-10-13 01:24:16,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:16,437 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-10-13 01:24:16,437 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) [2021-10-13 01:24:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-10-13 01:24:16,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:24:16,439 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:16,439 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:16,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-13 01:24:16,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:16,652 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-10-13 01:24:16,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:16,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411258637] [2021-10-13 01:24:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:16,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:16,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:16,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:16,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411258637] [2021-10-13 01:24:16,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411258637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:16,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902256694] [2021-10-13 01:24:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:16,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:16,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:24:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:17,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 01:24:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:17,118 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:24:17,118 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 [2021-10-13 01:24:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:17,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902256694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:17,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:17,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-10-13 01:24:17,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702938495] [2021-10-13 01:24:17,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:24:17,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:24:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:24:17,384 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:18,094 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-10-13 01:24:18,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:24:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-13 01:24:18,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:18,098 INFO L225 Difference]: With dead ends: 112 [2021-10-13 01:24:18,098 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 01:24:18,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-13 01:24:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 01:24:18,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-10-13 01:24:18,103 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) [2021-10-13 01:24:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-10-13 01:24:18,104 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-10-13 01:24:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:18,104 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-10-13 01:24:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-10-13 01:24:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:24:18,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:18,106 INFO L512 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] [2021-10-13 01:24:18,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 01:24:18,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:18,308 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-10-13 01:24:18,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:18,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159674285] [2021-10-13 01:24:18,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:18,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 01:24:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:24:18,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:18,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159674285] [2021-10-13 01:24:18,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159674285] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:18,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:18,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-13 01:24:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750256488] [2021-10-13 01:24:18,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:24:18,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:24:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:24:18,410 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) [2021-10-13 01:24:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:18,703 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-13 01:24:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:24:18,703 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 [2021-10-13 01:24:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:18,705 INFO L225 Difference]: With dead ends: 71 [2021-10-13 01:24:18,705 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 01:24:18,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:24:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 01:24:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-13 01:24:18,710 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) [2021-10-13 01:24:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-10-13 01:24:18,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-10-13 01:24:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:18,711 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-10-13 01:24:18,712 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) [2021-10-13 01:24:18,712 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-10-13 01:24:18,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:24:18,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:18,714 INFO L512 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] [2021-10-13 01:24:18,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 01:24:18,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:18,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-10-13 01:24:18,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:18,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125900278] [2021-10-13 01:24:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:18,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 01:24:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:24:18,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:18,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125900278] [2021-10-13 01:24:18,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125900278] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:18,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:18,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 01:24:18,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328328571] [2021-10-13 01:24:18,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:24:18,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:24:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:24:18,858 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) 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) [2021-10-13 01:24:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:19,164 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-13 01:24:19,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:24:19,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) 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 [2021-10-13 01:24:19,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:19,166 INFO L225 Difference]: With dead ends: 74 [2021-10-13 01:24:19,166 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 01:24:19,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:24:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 01:24:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-10-13 01:24:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 53 states have internal predecessors, (57), 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) [2021-10-13 01:24:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-10-13 01:24:19,171 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2021-10-13 01:24:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:19,171 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-10-13 01:24:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) 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) [2021-10-13 01:24:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-10-13 01:24:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 01:24:19,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:19,174 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:19,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 01:24:19,174 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash 764805398, now seen corresponding path program 2 times [2021-10-13 01:24:19,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:19,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586990061] [2021-10-13 01:24:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:19,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:19,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:19,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:19,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586990061] [2021-10-13 01:24:19,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586990061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:19,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809620101] [2021-10-13 01:24:19,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:24:19,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:19,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:19,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:24:19,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:24:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:24:19,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:24:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:19,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809620101] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:19,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:19,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-10-13 01:24:19,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419590644] [2021-10-13 01:24:19,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:24:19,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:24:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:24:19,654 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:20,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:20,326 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-10-13 01:24:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:24:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-13 01:24:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:20,328 INFO L225 Difference]: With dead ends: 111 [2021-10-13 01:24:20,328 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 01:24:20,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 528.3ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-10-13 01:24:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 01:24:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-13 01:24:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 73 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:24:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-10-13 01:24:20,334 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 23 [2021-10-13 01:24:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:20,334 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-10-13 01:24:20,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-10-13 01:24:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:24:20,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:20,337 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:20,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:20,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:20,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash -972613003, now seen corresponding path program 1 times [2021-10-13 01:24:20,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:20,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771784154] [2021-10-13 01:24:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:20,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:20,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 01:24:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:24:20,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:20,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771784154] [2021-10-13 01:24:20,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771784154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:20,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:24:20,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:24:20,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487205813] [2021-10-13 01:24:20,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:24:20,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:20,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:24:20,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:24:20,648 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-13 01:24:20,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:20,860 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-10-13 01:24:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:24:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 25 [2021-10-13 01:24:20,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:20,863 INFO L225 Difference]: With dead ends: 80 [2021-10-13 01:24:20,863 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 01:24:20,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:24:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 01:24:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-13 01:24:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 71 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:24:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-10-13 01:24:20,868 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 25 [2021-10-13 01:24:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:20,869 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-10-13 01:24:20,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-10-13 01:24:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-10-13 01:24:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:24:20,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:20,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 01:24:20,871 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:20,872 INFO L82 PathProgramCache]: Analyzing trace with hash 538529121, now seen corresponding path program 1 times [2021-10-13 01:24:20,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:20,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148090763] [2021-10-13 01:24:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:20,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:21,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:24:21,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:21,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148090763] [2021-10-13 01:24:21,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148090763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:21,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196933330] [2021-10-13 01:24:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:21,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:21,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:21,048 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:21,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:24:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:24:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:21,296 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:24:21,297 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 [2021-10-13 01:24:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 01:24:21,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196933330] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:24:21,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:24:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-10-13 01:24:21,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073693513] [2021-10-13 01:24:21,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:24:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:21,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:24:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:24:21,588 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 01:24:21,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:21,739 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-10-13 01:24:21,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:24:21,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 25 [2021-10-13 01:24:21,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:21,741 INFO L225 Difference]: With dead ends: 92 [2021-10-13 01:24:21,741 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 01:24:21,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:24:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 01:24:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-10-13 01:24:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.121212121212121) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:24:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-13 01:24:21,746 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 25 [2021-10-13 01:24:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:21,747 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-13 01:24:21,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-13 01:24:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-13 01:24:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 01:24:21,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:21,762 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:21,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:24:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 01:24:21,989 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1438237711, now seen corresponding path program 3 times [2021-10-13 01:24:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:21,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536596244] [2021-10-13 01:24:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:21,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:24:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:24:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:24:22,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:24:22,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536596244] [2021-10-13 01:24:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536596244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:22,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030551894] [2021-10-13 01:24:22,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 01:24:22,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:24:22,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:24:22,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:24:22,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:24:22,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-13 01:24:22,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:24:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:24:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:24:22,509 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 01:24:22,510 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 13 treesize of output 15 [2021-10-13 01:24:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 01:24:22,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030551894] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:24:22,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:24:22,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2021-10-13 01:24:22,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25818521] [2021-10-13 01:24:22,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:24:22,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:24:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:24:22,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:24:22,774 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:24:24,244 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-10-13 01:24:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 01:24:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-13 01:24:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:24:24,246 INFO L225 Difference]: With dead ends: 111 [2021-10-13 01:24:24,246 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 01:24:24,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1096.3ms TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2021-10-13 01:24:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 01:24:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-10-13 01:24:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 70 states have (on average 1.1) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:24:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-10-13 01:24:24,253 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 25 [2021-10-13 01:24:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:24:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-10-13 01:24:24,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:24:24,254 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-10-13 01:24:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 01:24:24,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:24:24,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:24:24,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 01:24:24,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 01:24:24,469 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-10-13 01:24:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:24:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1621777527, now seen corresponding path program 1 times [2021-10-13 01:24:24,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:24:24,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281977663] [2021-10-13 01:24:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:24:24,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:24:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:24:24,488 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:24:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:24:24,538 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:24:24,538 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:24:24,540 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:24:24,542 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:24:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-13 01:24:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-13 01:24:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,543 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,544 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,545 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:24:24,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:24:24,546 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-10-13 01:24:24,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-10-13 01:24:24,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-10-13 01:24:24,547 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-10-13 01:24:24,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 01:24:24,556 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:24:24,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:24:24 BoogieIcfgContainer [2021-10-13 01:24:24,605 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:24:24,606 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:24:24,606 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:24:24,606 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:24:24,607 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:24:10" (3/4) ... [2021-10-13 01:24:24,610 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 01:24:24,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:24:24,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:24:24,671 INFO L168 Benchmark]: Toolchain (without parser) took 15161.51 ms. Allocated memory was 109.1 MB in the beginning and 157.3 MB in the end (delta: 48.2 MB). Free memory was 68.9 MB in the beginning and 96.2 MB in the end (delta: -27.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,672 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 86.2 MB in the end (delta: 58.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:24:24,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 565.39 ms. Allocated memory is still 109.1 MB. Free memory was 68.7 MB in the beginning and 78.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,673 INFO L168 Benchmark]: Boogie Preprocessor took 71.44 ms. Allocated memory is still 109.1 MB. Free memory was 78.7 MB in the beginning and 76.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,673 INFO L168 Benchmark]: RCFGBuilder took 757.60 ms. Allocated memory is still 109.1 MB. Free memory was 76.0 MB in the beginning and 55.5 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,674 INFO L168 Benchmark]: TraceAbstraction took 13695.99 ms. Allocated memory was 109.1 MB in the beginning and 157.3 MB in the end (delta: 48.2 MB). Free memory was 55.2 MB in the beginning and 98.3 MB in the end (delta: -43.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,675 INFO L168 Benchmark]: Witness Printer took 63.78 ms. Allocated memory is still 157.3 MB. Free memory was 98.3 MB in the beginning and 96.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:24:24,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 86.2 MB in the end (delta: 58.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 565.39 ms. Allocated memory is still 109.1 MB. Free memory was 68.7 MB in the beginning and 78.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 71.44 ms. Allocated memory is still 109.1 MB. Free memory was 78.7 MB in the beginning and 76.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 757.60 ms. Allocated memory is still 109.1 MB. Free memory was 76.0 MB in the beginning and 55.5 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13695.99 ms. Allocated memory was 109.1 MB in the beginning and 157.3 MB in the end (delta: 48.2 MB). Free memory was 55.2 MB in the beginning and 98.3 MB in the end (delta: -43.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Witness Printer took 63.78 ms. Allocated memory is still 157.3 MB. Free memory was 98.3 MB in the beginning and 96.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=57, \old(a)=52, \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={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, b++={-2:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L544] b[-1] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, b[-1]=0, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] [L547] free(a) [L547] free(b) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={-3:0}, b={-2:4}, n=1] - 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: 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: 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: 13571.1ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 46.4ms, AutomataDifference: 5704.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 718 SDtfs, 1276 SDslu, 1249 SDs, 0 SdLazy, 2258 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2529.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3583.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=12, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 168.9ms AutomataMinimizationTime, 15 MinimizatonAttempts, 306 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 150.4ms SsaConstructionTime, 481.8ms SatisfiabilityAnalysisTime, 4073.5ms InterpolantComputationTime, 435 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 2879 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1126 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 22 InterpolantComputations, 12 PerfectInterpolantSequences, 47/81 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! [2021-10-13 01:24:24,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f5838ee-79b5-47f1-b0dc-80084a0e0cff/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...