./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 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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-20ed64e [2021-08-27 05:48:26,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:48:26,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:48:26,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:48:26,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:48:26,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:48:26,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:48:26,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:48:26,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:48:26,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:48:26,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:48:26,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:48:26,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:48:26,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:48:26,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:48:26,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:48:26,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:48:26,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:48:26,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:48:26,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:48:26,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:48:26,085 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:48:26,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:48:26,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:48:26,094 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:48:26,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:48:26,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:48:26,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:48:26,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:48:26,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:48:26,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:48:26,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:48:26,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:48:26,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:48:26,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:48:26,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:48:26,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:48:26,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:48:26,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:48:26,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:48:26,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:48:26,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:48:26,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:48:26,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:48:26,145 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:48:26,145 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:48:26,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:48:26,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:48:26,147 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:48:26,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:48:26,148 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:48:26,148 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:48:26,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:48:26,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:48:26,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:48:26,149 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:48:26,149 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:48:26,150 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:48:26,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:48:26,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:48:26,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:48:26,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:48:26,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:48:26,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:48:26,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:48:26,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:48:26,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:48:26,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:48:26,158 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:48:26,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:48:26,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:48:26,158 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2021-08-27 05:48:26,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:48:26,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:48:26,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:48:26,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:48:26,483 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:48:26,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-08-27 05:48:26,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d39b4bba/b3b05f58decf4cecad4d6ce8e2c04378/FLAG4d5e77647 [2021-08-27 05:48:27,005 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:48:27,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-08-27 05:48:27,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d39b4bba/b3b05f58decf4cecad4d6ce8e2c04378/FLAG4d5e77647 [2021-08-27 05:48:27,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d39b4bba/b3b05f58decf4cecad4d6ce8e2c04378 [2021-08-27 05:48:27,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:48:27,339 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:48:27,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:48:27,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:48:27,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:48:27,344 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a2d2d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27, skipping insertion in model container [2021-08-27 05:48:27,345 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:48:27,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:48:27,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:48:27,708 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:48:27,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:48:27,777 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:48:27,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27 WrapperNode [2021-08-27 05:48:27,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:48:27,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:48:27,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:48:27,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:48:27,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:48:27,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:48:27,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:48:27,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:48:27,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (1/1) ... [2021-08-27 05:48:27,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:48:27,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:27,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:48:27,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:48:27,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:48:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:48:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:48:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:48:27,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:48:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:48:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:48:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:48:27,910 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-27 05:48:27,911 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:48:27,911 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:48:27,911 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:48:27,912 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:48:27,913 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:48:27,914 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:48:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:48:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:48:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:48:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:48:27,915 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:48:27,916 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:48:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:48:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:48:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:48:27,917 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:48:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:48:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:48:27,918 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:48:27,919 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:48:27,920 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:48:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:48:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:48:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:48:27,921 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:48:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:48:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:48:27,922 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:48:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:48:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:48:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:48:27,923 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:48:27,924 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:48:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:48:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:48:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:48:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:48:27,925 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:48:27,926 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:48:27,927 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:48:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:48:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:48:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:48:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:48:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:48:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:48:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:48:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:48:27,934 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:48:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:48:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:48:27,935 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:48:27,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:48:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-27 05:48:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:48:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:48:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:48:27,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:48:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:48:27,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:48:27,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:48:27,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:48:28,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:48:28,536 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 05:48:28,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:48:28 BoogieIcfgContainer [2021-08-27 05:48:28,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:48:28,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:48:28,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:48:28,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:48:28,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:48:27" (1/3) ... [2021-08-27 05:48:28,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13362d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:48:28, skipping insertion in model container [2021-08-27 05:48:28,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:48:27" (2/3) ... [2021-08-27 05:48:28,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13362d09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:48:28, skipping insertion in model container [2021-08-27 05:48:28,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:48:28" (3/3) ... [2021-08-27 05:48:28,565 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2021-08-27 05:48:28,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:48:28,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-08-27 05:48:28,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:48:28,628 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 [2021-08-27 05:48:28,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-08-27 05:48:28,642 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) [2021-08-27 05:48:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 05:48:28,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:28,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:28,648 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:28,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-08-27 05:48:28,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:28,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009903423] [2021-08-27 05:48:28,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:28,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:28,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:28,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:28,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009903423] [2021-08-27 05:48:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009903423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:28,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:48:28,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894866357] [2021-08-27 05:48:28,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:48:28,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:48:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:48:28,881 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) [2021-08-27 05:48:29,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:29,031 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-27 05:48:29,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:48:29,033 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 [2021-08-27 05:48:29,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:29,039 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:48:29,039 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 05:48:29,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:48:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 05:48:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 05:48:29,068 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) [2021-08-27 05:48:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 05:48:29,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-08-27 05:48:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:29,073 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 05:48:29,073 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) [2021-08-27 05:48:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 05:48:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:48:29,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:29,075 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:29,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:48:29,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:29,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:29,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-08-27 05:48:29,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:29,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805309739] [2021-08-27 05:48:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:29,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:29,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:29,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805309739] [2021-08-27 05:48:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805309739] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:29,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:48:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52401490] [2021-08-27 05:48:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:48:29,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:48:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:48:29,300 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) [2021-08-27 05:48:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:29,643 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-27 05:48:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:48:29,643 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 [2021-08-27 05:48:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:29,649 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:48:29,649 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:48:29,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:48:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:48:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-08-27 05:48:29,655 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) [2021-08-27 05:48:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-27 05:48:29,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-08-27 05:48:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:29,657 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-27 05:48:29,657 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) [2021-08-27 05:48:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-27 05:48:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:48:29,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:29,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:29,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:48:29,658 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:29,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:29,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-08-27 05:48:29,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:29,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808531893] [2021-08-27 05:48:29,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:29,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:29,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:29,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808531893] [2021-08-27 05:48:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808531893] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:29,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:29,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:48:29,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040244298] [2021-08-27 05:48:29,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:48:29,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:29,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:48:29,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:48:29,750 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) [2021-08-27 05:48:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:29,863 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-27 05:48:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:48:29,865 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 [2021-08-27 05:48:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:29,872 INFO L225 Difference]: With dead ends: 62 [2021-08-27 05:48:29,873 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 05:48:29,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:48:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 05:48:29,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 05:48:29,877 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) [2021-08-27 05:48:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-08-27 05:48:29,879 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-08-27 05:48:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:29,879 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-08-27 05:48:29,879 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) [2021-08-27 05:48:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-08-27 05:48:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:48:29,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:29,880 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:29,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:48:29,880 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:29,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:29,881 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-08-27 05:48:29,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:29,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587220235] [2021-08-27 05:48:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:29,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:29,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:29,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587220235] [2021-08-27 05:48:29,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587220235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:29,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458586599] [2021-08-27 05:48:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:29,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:29,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 05:48:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:30,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:48:30,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:30,274 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:48:30,285 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 [2021-08-27 05:48:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:30,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458586599] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:30,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:48:30,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-08-27 05:48:30,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789290320] [2021-08-27 05:48:30,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:48:30,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:30,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:48:30,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:48:30,360 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) [2021-08-27 05:48:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:30,442 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-08-27 05:48:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:48:30,443 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 [2021-08-27 05:48:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:30,444 INFO L225 Difference]: With dead ends: 108 [2021-08-27 05:48:30,444 INFO L226 Difference]: Without dead ends: 108 [2021-08-27 05:48:30,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:48:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-27 05:48:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-08-27 05:48:30,449 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) [2021-08-27 05:48:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-27 05:48:30,450 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-08-27 05:48:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:30,450 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-27 05:48:30,451 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) [2021-08-27 05:48:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-27 05:48:30,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 05:48:30,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:30,451 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:30,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:30,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:30,673 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:30,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-08-27 05:48:30,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:30,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759649723] [2021-08-27 05:48:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:30,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:30,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:30,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:30,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759649723] [2021-08-27 05:48:30,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759649723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:30,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:30,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:48:30,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383295127] [2021-08-27 05:48:30,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:48:30,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:48:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:48:30,808 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) [2021-08-27 05:48:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:30,948 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-27 05:48:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:48:30,950 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 [2021-08-27 05:48:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:30,952 INFO L225 Difference]: With dead ends: 54 [2021-08-27 05:48:30,952 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 05:48:30,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:48:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 05:48:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-27 05:48:30,956 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) [2021-08-27 05:48:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-27 05:48:30,956 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-08-27 05:48:30,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:30,958 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-27 05:48:30,958 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) [2021-08-27 05:48:30,958 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-27 05:48:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 05:48:30,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:30,959 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:30,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:48:30,959 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-08-27 05:48:30,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:30,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859958440] [2021-08-27 05:48:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:30,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:31,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:31,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:31,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859958440] [2021-08-27 05:48:31,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859958440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:31,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:31,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:48:31,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596021542] [2021-08-27 05:48:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:48:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:48:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:48:31,092 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) [2021-08-27 05:48:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:31,377 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-27 05:48:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:48:31,378 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 [2021-08-27 05:48:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:31,379 INFO L225 Difference]: With dead ends: 98 [2021-08-27 05:48:31,379 INFO L226 Difference]: Without dead ends: 98 [2021-08-27 05:48:31,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:48:31,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-27 05:48:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-08-27 05:48:31,386 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) [2021-08-27 05:48:31,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-08-27 05:48:31,387 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-08-27 05:48:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:31,387 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-08-27 05:48:31,387 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) [2021-08-27 05:48:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-08-27 05:48:31,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 05:48:31,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:31,388 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:31,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:48:31,388 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:31,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:31,389 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-08-27 05:48:31,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:31,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587509367] [2021-08-27 05:48:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:31,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:31,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:31,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:31,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587509367] [2021-08-27 05:48:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587509367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:31,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624957506] [2021-08-27 05:48:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:31,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:31,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:31,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 05:48:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:31,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:48:31,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:31,761 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:48:31,761 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 [2021-08-27 05:48:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:31,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624957506] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:31,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:48:31,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-27 05:48:31,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092606909] [2021-08-27 05:48:31,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:48:31,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:48:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:48:31,931 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) [2021-08-27 05:48:32,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:32,080 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-27 05:48:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:48:32,081 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 [2021-08-27 05:48:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:32,082 INFO L225 Difference]: With dead ends: 104 [2021-08-27 05:48:32,082 INFO L226 Difference]: Without dead ends: 104 [2021-08-27 05:48:32,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:48:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-27 05:48:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-08-27 05:48:32,098 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) [2021-08-27 05:48:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-27 05:48:32,100 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-08-27 05:48:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:32,100 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-27 05:48:32,100 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) [2021-08-27 05:48:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-27 05:48:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:48:32,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:32,101 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:32,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:32,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-27 05:48:32,305 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-08-27 05:48:32,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:32,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523526285] [2021-08-27 05:48:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:32,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:32,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:32,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:32,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523526285] [2021-08-27 05:48:32,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523526285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:32,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559059532] [2021-08-27 05:48:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:32,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:32,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 05:48:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:32,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 05:48:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:32,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:32,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559059532] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:32,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:48:32,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-08-27 05:48:32,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189794395] [2021-08-27 05:48:32,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:48:32,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:48:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:48:32,630 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) [2021-08-27 05:48:32,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:32,668 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-08-27 05:48:32,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:48:32,669 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 [2021-08-27 05:48:32,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:32,670 INFO L225 Difference]: With dead ends: 97 [2021-08-27 05:48:32,670 INFO L226 Difference]: Without dead ends: 97 [2021-08-27 05:48:32,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:48:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-27 05:48:32,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-08-27 05:48:32,673 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) [2021-08-27 05:48:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-08-27 05:48:32,673 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-08-27 05:48:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-08-27 05:48:32,674 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) [2021-08-27 05:48:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-08-27 05:48:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:48:32,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:32,674 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:32,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:32,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:32,893 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-08-27 05:48:32,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:32,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704975259] [2021-08-27 05:48:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:32,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:33,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:33,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:33,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704975259] [2021-08-27 05:48:33,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704975259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:33,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700199487] [2021-08-27 05:48:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:33,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:33,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 05:48:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 05:48:33,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:33,313 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:48:33,313 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 [2021-08-27 05:48:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:33,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700199487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:33,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:48:33,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2021-08-27 05:48:33,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822096256] [2021-08-27 05:48:33,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 05:48:33,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:33,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 05:48:33,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:48:33,658 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) [2021-08-27 05:48:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:34,228 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-08-27 05:48:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:48:34,229 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 [2021-08-27 05:48:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:34,231 INFO L225 Difference]: With dead ends: 112 [2021-08-27 05:48:34,231 INFO L226 Difference]: Without dead ends: 112 [2021-08-27 05:48:34,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-08-27 05:48:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-27 05:48:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-08-27 05:48:34,234 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) [2021-08-27 05:48:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-27 05:48:34,235 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-08-27 05:48:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:34,235 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-27 05:48:34,235 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) [2021-08-27 05:48:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-27 05:48:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:48:34,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:34,236 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] [2021-08-27 05:48:34,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:34,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:34,449 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-08-27 05:48:34,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:34,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298951674] [2021-08-27 05:48:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:34,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:48:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:48:34,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:34,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298951674] [2021-08-27 05:48:34,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298951674] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:34,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:34,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:48:34,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255305022] [2021-08-27 05:48:34,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:48:34,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:34,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:48:34,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:48:34,521 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) [2021-08-27 05:48:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:34,722 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-08-27 05:48:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:48:34,722 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 [2021-08-27 05:48:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:34,723 INFO L225 Difference]: With dead ends: 71 [2021-08-27 05:48:34,723 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 05:48:34,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:48:34,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 05:48:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 05:48:34,725 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) [2021-08-27 05:48:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-27 05:48:34,726 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-08-27 05:48:34,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:34,726 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-27 05:48:34,726 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) [2021-08-27 05:48:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-27 05:48:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:48:34,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:34,727 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] [2021-08-27 05:48:34,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 05:48:34,727 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:34,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-08-27 05:48:34,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:34,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519758748] [2021-08-27 05:48:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:34,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:48:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:48:34,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:34,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519758748] [2021-08-27 05:48:34,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519758748] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:34,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:34,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:48:34,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752697837] [2021-08-27 05:48:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:48:34,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:48:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:48:34,827 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) [2021-08-27 05:48:35,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:35,063 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-08-27 05:48:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 05:48:35,064 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 [2021-08-27 05:48:35,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:35,065 INFO L225 Difference]: With dead ends: 74 [2021-08-27 05:48:35,065 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 05:48:35,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:48:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 05:48:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-08-27 05:48:35,067 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) [2021-08-27 05:48:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-08-27 05:48:35,068 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2021-08-27 05:48:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:35,068 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-08-27 05:48:35,068 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) [2021-08-27 05:48:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-08-27 05:48:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 05:48:35,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:35,069 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:35,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 05:48:35,070 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash 764805398, now seen corresponding path program 2 times [2021-08-27 05:48:35,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:35,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179877870] [2021-08-27 05:48:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:35,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:35,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:35,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179877870] [2021-08-27 05:48:35,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179877870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:35,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376720926] [2021-08-27 05:48:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:48:35,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:35,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:35,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:35,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 05:48:35,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:48:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:48:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:48:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:35,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376720926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:35,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:48:35,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-27 05:48:35,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003213304] [2021-08-27 05:48:35,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 05:48:35,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 05:48:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:48:35,473 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) [2021-08-27 05:48:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:35,974 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-08-27 05:48:35,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 05:48:35,975 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 [2021-08-27 05:48:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:35,975 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:48:35,975 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:48:35,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-27 05:48:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:48:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-08-27 05:48:35,980 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) [2021-08-27 05:48:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-08-27 05:48:35,980 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 23 [2021-08-27 05:48:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:35,980 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-08-27 05:48:35,980 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) [2021-08-27 05:48:35,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-08-27 05:48:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 05:48:35,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:35,981 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] [2021-08-27 05:48:35,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 05:48:36,182 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:36,183 INFO L82 PathProgramCache]: Analyzing trace with hash -972613003, now seen corresponding path program 1 times [2021-08-27 05:48:36,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:36,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861732067] [2021-08-27 05:48:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:36,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 05:48:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:48:36,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:36,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861732067] [2021-08-27 05:48:36,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861732067] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:36,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:48:36,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:48:36,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227993490] [2021-08-27 05:48:36,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:48:36,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:48:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:48:36,259 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) [2021-08-27 05:48:36,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:36,422 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-08-27 05:48:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:48:36,423 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 [2021-08-27 05:48:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:36,424 INFO L225 Difference]: With dead ends: 80 [2021-08-27 05:48:36,424 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 05:48:36,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:48:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 05:48:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-27 05:48:36,427 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) [2021-08-27 05:48:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-08-27 05:48:36,427 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 25 [2021-08-27 05:48:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:36,428 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-08-27 05:48:36,428 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) [2021-08-27 05:48:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-08-27 05:48:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 05:48:36,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:36,434 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] [2021-08-27 05:48:36,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 05:48:36,435 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 538529121, now seen corresponding path program 1 times [2021-08-27 05:48:36,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:36,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539619307] [2021-08-27 05:48:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:36,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 05:48:36,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:36,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539619307] [2021-08-27 05:48:36,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539619307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:36,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191091779] [2021-08-27 05:48:36,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:36,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:36,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:36,573 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:36,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 05:48:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 05:48:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:36,840 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:48:36,840 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 [2021-08-27 05:48:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 05:48:37,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191091779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:48:37,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 05:48:37,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-27 05:48:37,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730396768] [2021-08-27 05:48:37,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:48:37,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:48:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:48:37,091 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) [2021-08-27 05:48:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:37,223 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-08-27 05:48:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:48:37,224 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 [2021-08-27 05:48:37,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:37,226 INFO L225 Difference]: With dead ends: 92 [2021-08-27 05:48:37,226 INFO L226 Difference]: Without dead ends: 92 [2021-08-27 05:48:37,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 05:48:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-27 05:48:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-08-27 05:48:37,230 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) [2021-08-27 05:48:37,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-27 05:48:37,230 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 25 [2021-08-27 05:48:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:37,231 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-27 05:48:37,231 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) [2021-08-27 05:48:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-27 05:48:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 05:48:37,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:37,233 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:48:37,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:37,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:37,458 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1438237711, now seen corresponding path program 3 times [2021-08-27 05:48:37,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:37,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597810869] [2021-08-27 05:48:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:37,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:37,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:48:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:48:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:48:37,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:48:37,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597810869] [2021-08-27 05:48:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597810869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:37,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266666070] [2021-08-27 05:48:37,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:48:37,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:48:37,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:48:37,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 05:48:37,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-27 05:48:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:48:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 05:48:37,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:48:37,953 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 05:48:37,954 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 [2021-08-27 05:48:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-27 05:48:38,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266666070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:48:38,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:48:38,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14 [2021-08-27 05:48:38,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739863286] [2021-08-27 05:48:38,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 05:48:38,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:48:38,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 05:48:38,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:48:38,149 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) [2021-08-27 05:48:39,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:48:39,341 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-08-27 05:48:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 05:48:39,342 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 [2021-08-27 05:48:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:48:39,342 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:48:39,342 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:48:39,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 906.8ms TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2021-08-27 05:48:39,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:48:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-08-27 05:48:39,348 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) [2021-08-27 05:48:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-08-27 05:48:39,349 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 25 [2021-08-27 05:48:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:48:39,350 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-08-27 05:48:39,350 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) [2021-08-27 05:48:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-08-27 05:48:39,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 05:48:39,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:48:39,351 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] [2021-08-27 05:48:39,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:48:39,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:48:39,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-27 05:48:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:48:39,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1621777527, now seen corresponding path program 1 times [2021-08-27 05:48:39,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:48:39,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104120960] [2021-08-27 05:48:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:48:39,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:48:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:48:39,585 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:48:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:48:39,625 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 05:48:39,625 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:48:39,626 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr13ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:48:39,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:48:39,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:48:39,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:48:39,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION [2021-08-27 05:48:39,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION [2021-08-27 05:48:39,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION [2021-08-27 05:48:39,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 05:48:39,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:48:39,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:48:39 BoogieIcfgContainer [2021-08-27 05:48:39,689 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:48:39,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:48:39,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:48:39,690 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:48:39,690 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:48:28" (3/4) ... [2021-08-27 05:48:39,691 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 05:48:39,730 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:48:39,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:48:39,731 INFO L168 Benchmark]: Toolchain (without parser) took 12392.07 ms. Allocated memory was 48.2 MB in the beginning and 151.0 MB in the end (delta: 102.8 MB). Free memory was 22.5 MB in the beginning and 101.4 MB in the end (delta: -78.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,731 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory was 30.3 MB in the beginning and 30.2 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:48:39,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 437.11 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.3 MB in the beginning and 35.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,732 INFO L168 Benchmark]: Boogie Preprocessor took 44.15 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 33.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,732 INFO L168 Benchmark]: RCFGBuilder took 721.58 ms. Allocated memory is still 58.7 MB. Free memory was 33.2 MB in the beginning and 38.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,732 INFO L168 Benchmark]: TraceAbstraction took 11142.44 ms. Allocated memory was 58.7 MB in the beginning and 151.0 MB in the end (delta: 92.3 MB). Free memory was 37.7 MB in the beginning and 103.5 MB in the end (delta: -65.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,733 INFO L168 Benchmark]: Witness Printer took 40.73 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:48:39,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 48.2 MB. Free memory was 30.3 MB in the beginning and 30.2 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 437.11 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 22.3 MB in the beginning and 35.7 MB in the end (delta: -13.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.15 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 33.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 721.58 ms. Allocated memory is still 58.7 MB. Free memory was 33.2 MB in the beginning and 38.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11142.44 ms. Allocated memory was 58.7 MB in the beginning and 151.0 MB in the end (delta: 92.3 MB). Free memory was 37.7 MB in the beginning and 103.5 MB in the end (delta: -65.8 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. * Witness Printer took 40.73 ms. Allocated memory is still 151.0 MB. Free memory was 103.5 MB in the beginning and 101.4 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)=52, \old(a)=57, \old(b)=55, \old(b)=54, \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: 11015.6ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 23.5ms, AutomataDifference: 4378.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 718 SDtfs, 1276 SDslu, 1249 SDs, 0 SdLazy, 2258 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1776.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3010.2ms 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: 93.2ms AutomataMinimizationTime, 15 MinimizatonAttempts, 306 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 97.5ms SsaConstructionTime, 360.1ms SatisfiabilityAnalysisTime, 3267.0ms 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! [2021-08-27 05:48:39,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...