./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 5fbdf5bf 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-wip.dd.seqcomp-5fbdf5b [2021-08-30 17:27:25,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 17:27:25,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 17:27:25,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 17:27:25,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 17:27:25,067 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 17:27:25,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 17:27:25,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 17:27:25,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 17:27:25,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 17:27:25,071 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 17:27:25,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 17:27:25,073 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 17:27:25,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 17:27:25,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 17:27:25,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 17:27:25,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 17:27:25,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 17:27:25,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 17:27:25,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 17:27:25,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 17:27:25,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 17:27:25,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 17:27:25,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 17:27:25,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 17:27:25,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 17:27:25,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 17:27:25,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 17:27:25,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 17:27:25,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 17:27:25,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 17:27:25,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 17:27:25,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 17:27:25,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 17:27:25,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 17:27:25,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 17:27:25,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 17:27:25,089 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 17:27:25,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 17:27:25,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 17:27:25,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 17:27:25,092 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 17:27:25,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 17:27:25,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 17:27:25,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 17:27:25,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 17:27:25,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 17:27:25,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 17:27:25,111 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 17:27:25,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 17:27:25,112 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 17:27:25,113 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 17:27:25,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 17:27:25,113 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 17:27:25,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 17:27:25,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 17:27:25,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 17:27:25,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 17:27:25,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 17:27:25,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:27:25,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 17:27:25,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 17:27:25,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 17:27:25,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 17:27:25,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 17:27:25,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2021-08-30 17:27:25,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 17:27:25,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 17:27:25,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 17:27:25,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 17:27:25,387 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 17:27:25,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-08-30 17:27:25,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693ed310/ad873f5462fe4d7b9368bdbde6f06ec6/FLAGd67876d00 [2021-08-30 17:27:25,831 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 17:27:25,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2021-08-30 17:27:25,842 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693ed310/ad873f5462fe4d7b9368bdbde6f06ec6/FLAGd67876d00 [2021-08-30 17:27:25,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693ed310/ad873f5462fe4d7b9368bdbde6f06ec6 [2021-08-30 17:27:25,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 17:27:25,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 17:27:25,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 17:27:25,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 17:27:25,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 17:27:25,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:27:25" (1/1) ... [2021-08-30 17:27:25,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ad7f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:25, skipping insertion in model container [2021-08-30 17:27:25,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 05:27:25" (1/1) ... [2021-08-30 17:27:25,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 17:27:25,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 17:27:26,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:27:26,097 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 17:27:26,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 17:27:26,158 INFO L208 MainTranslator]: Completed translation [2021-08-30 17:27:26,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26 WrapperNode [2021-08-30 17:27:26,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 17:27:26,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 17:27:26,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 17:27:26,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 17:27:26,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 17:27:26,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 17:27:26,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 17:27:26,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 17:27:26,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (1/1) ... [2021-08-30 17:27:26,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 17:27:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:26,219 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) [2021-08-30 17:27:26,229 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 [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 17:27:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 17:27:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 17:27:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-30 17:27:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 17:27:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 17:27:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-30 17:27:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-30 17:27:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-30 17:27:26,255 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 17:27:26,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 17:27:26,257 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 17:27:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 17:27:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 17:27:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 17:27:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 17:27:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 17:27:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 17:27:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 17:27:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 17:27:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 17:27:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 17:27:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 17:27:26,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 17:27:26,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 17:27:26,273 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 17:27:26,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 17:27:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 17:27:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-30 17:27:26,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 17:27:26,558 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 17:27:26,561 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 17:27:26,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:27:26 BoogieIcfgContainer [2021-08-30 17:27:26,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 17:27:26,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 17:27:26,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 17:27:26,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 17:27:26,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 05:27:25" (1/3) ... [2021-08-30 17:27:26,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa1efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:27:26, skipping insertion in model container [2021-08-30 17:27:26,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 05:27:26" (2/3) ... [2021-08-30 17:27:26,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78fa1efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 05:27:26, skipping insertion in model container [2021-08-30 17:27:26,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:27:26" (3/3) ... [2021-08-30 17:27:26,574 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2021-08-30 17:27:26,579 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 17:27:26,579 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-08-30 17:27:26,615 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 17:27:26,622 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 [2021-08-30 17:27:26,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-08-30 17:27:26,635 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) [2021-08-30 17:27:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-30 17:27:26,652 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:26,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:26,653 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:26,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2038959101, now seen corresponding path program 1 times [2021-08-30 17:27:26,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:26,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041762543] [2021-08-30 17:27:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:26,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:26,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:26,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:26,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041762543] [2021-08-30 17:27:26,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041762543] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:26,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:26,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:27:26,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104916604] [2021-08-30 17:27:26,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 17:27:26,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 17:27:26,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:27:26,936 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) [2021-08-30 17:27:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:27,055 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-30 17:27:27,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 17:27:27,057 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 [2021-08-30 17:27:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:27,062 INFO L225 Difference]: With dead ends: 62 [2021-08-30 17:27:27,063 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 17:27:27,064 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.18ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 17:27:27,067 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.96ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:27,068 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 106 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 95.96ms Time] [2021-08-30 17:27:27,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 17:27:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-30 17:27:27,093 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) [2021-08-30 17:27:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-30 17:27:27,096 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2021-08-30 17:27:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:27,097 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-30 17:27:27,097 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) [2021-08-30 17:27:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-30 17:27:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:27:27,098 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:27,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:27,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 17:27:27,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:27,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:27,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562945, now seen corresponding path program 1 times [2021-08-30 17:27:27,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:27,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127088161] [2021-08-30 17:27:27,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:27,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:27,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:27,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127088161] [2021-08-30 17:27:27,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127088161] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:27,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:27,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:27:27,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382918942] [2021-08-30 17:27:27,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:27:27,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:27:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:27:27,218 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) [2021-08-30 17:27:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:27,441 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-08-30 17:27:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:27:27,442 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 [2021-08-30 17:27:27,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:27,446 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:27:27,446 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:27:27,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.30ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:27:27,450 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 136.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.51ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.30ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:27,450 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 14 Invalid, 221 Unknown, 0 Unchecked, 6.51ms Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 166.30ms Time] [2021-08-30 17:27:27,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:27:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 63. [2021-08-30 17:27:27,460 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) [2021-08-30 17:27:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-30 17:27:27,466 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 10 [2021-08-30 17:27:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:27,466 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-30 17:27:27,467 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) [2021-08-30 17:27:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-30 17:27:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-30 17:27:27,467 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:27,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:27,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 17:27:27,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1216562944, now seen corresponding path program 1 times [2021-08-30 17:27:27,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:27,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122163136] [2021-08-30 17:27:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:27,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:27,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:27,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122163136] [2021-08-30 17:27:27,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122163136] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:27,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:27,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 17:27:27,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525102347] [2021-08-30 17:27:27,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 17:27:27,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 17:27:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:27:27,557 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) [2021-08-30 17:27:27,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:27,653 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2021-08-30 17:27:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 17:27:27,654 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 [2021-08-30 17:27:27,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:27,654 INFO L225 Difference]: With dead ends: 62 [2021-08-30 17:27:27,654 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 17:27:27,654 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.93ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 17:27:27,655 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.67ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:27,655 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 154 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 88.67ms Time] [2021-08-30 17:27:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 17:27:27,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 17:27:27,658 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) [2021-08-30 17:27:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-08-30 17:27:27,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2021-08-30 17:27:27,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:27,659 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-08-30 17:27:27,659 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) [2021-08-30 17:27:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-08-30 17:27:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-30 17:27:27,660 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:27,660 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:27,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 17:27:27,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 887456838, now seen corresponding path program 1 times [2021-08-30 17:27:27,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:27,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923619269] [2021-08-30 17:27:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:27,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:27,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:27,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923619269] [2021-08-30 17:27:27,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923619269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:27,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496653944] [2021-08-30 17:27:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:27,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:27,716 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) [2021-08-30 17:27:27,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 17:27:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:27:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:27,942 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:27:27,943 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 [2021-08-30 17:27:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:27,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:27:27,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496653944] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:27,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:27:27,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-08-30 17:27:27,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321423014] [2021-08-30 17:27:27,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:27:27,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:27,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:27:27,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-30 17:27:27,996 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) [2021-08-30 17:27:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:28,182 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-08-30 17:27:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:27:28,182 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 [2021-08-30 17:27:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:28,185 INFO L225 Difference]: With dead ends: 108 [2021-08-30 17:27:28,185 INFO L226 Difference]: Without dead ends: 108 [2021-08-30 17:27:28,186 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.61ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:27:28,192 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 104 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 121.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.75ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.63ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:28,193 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 17 Invalid, 270 Unknown, 0 Unchecked, 1.75ms Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 157.63ms Time] [2021-08-30 17:27:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-30 17:27:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2021-08-30 17:27:28,202 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) [2021-08-30 17:27:28,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-30 17:27:28,203 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2021-08-30 17:27:28,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:28,203 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-30 17:27:28,203 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) [2021-08-30 17:27:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-30 17:27:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:27:28,204 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:28,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:28,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:28,416 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 [2021-08-30 17:27:28,417 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fooErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486182, now seen corresponding path program 1 times [2021-08-30 17:27:28,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:28,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143003345] [2021-08-30 17:27:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:28,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:28,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:28,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143003345] [2021-08-30 17:27:28,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143003345] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:28,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:28,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:27:28,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668171131] [2021-08-30 17:27:28,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:27:28,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:27:28,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:27:28,490 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) [2021-08-30 17:27:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:28,579 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-30 17:27:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:27:28,579 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 [2021-08-30 17:27:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:28,580 INFO L225 Difference]: With dead ends: 54 [2021-08-30 17:27:28,580 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 17:27:28,580 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.28ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:27:28,581 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.93ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.12ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:28,581 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 142 Unknown, 0 Unchecked, 0.93ms Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 67.12ms Time] [2021-08-30 17:27:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 17:27:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 17:27:28,583 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) [2021-08-30 17:27:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-30 17:27:28,583 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2021-08-30 17:27:28,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:28,584 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-30 17:27:28,584 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) [2021-08-30 17:27:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-30 17:27:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 17:27:28,584 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:28,584 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:28,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 17:27:28,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:28,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1178486181, now seen corresponding path program 1 times [2021-08-30 17:27:28,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:28,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557779941] [2021-08-30 17:27:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:28,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:28,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:28,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557779941] [2021-08-30 17:27:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557779941] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:28,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:28,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:27:28,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648188049] [2021-08-30 17:27:28,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:27:28,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:28,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:27:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:27:28,675 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) [2021-08-30 17:27:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:28,888 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-08-30 17:27:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:27:28,888 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 [2021-08-30 17:27:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:28,889 INFO L225 Difference]: With dead ends: 98 [2021-08-30 17:27:28,889 INFO L226 Difference]: Without dead ends: 98 [2021-08-30 17:27:28,889 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 84.88ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:27:28,889 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 152.97ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:28,889 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 357 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [15 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 152.97ms Time] [2021-08-30 17:27:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-30 17:27:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2021-08-30 17:27:28,892 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) [2021-08-30 17:27:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-08-30 17:27:28,893 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2021-08-30 17:27:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:28,893 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-08-30 17:27:28,893 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) [2021-08-30 17:27:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-08-30 17:27:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 17:27:28,893 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:28,893 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:28,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 17:27:28,893 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash -939786186, now seen corresponding path program 1 times [2021-08-30 17:27:28,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:28,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351354041] [2021-08-30 17:27:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:28,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:28,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:28,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351354041] [2021-08-30 17:27:28,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351354041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:28,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097659990] [2021-08-30 17:27:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:28,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:28,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:28,989 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) [2021-08-30 17:27:28,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 17:27:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:29,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-30 17:27:29,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:29,103 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:27:29,103 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 [2021-08-30 17:27:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:29,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:27:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097659990] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:29,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:27:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-30 17:27:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252993418] [2021-08-30 17:27:29,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:27:29,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:27:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:27:29,184 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) [2021-08-30 17:27:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:29,365 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-08-30 17:27:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:27:29,365 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 [2021-08-30 17:27:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:29,366 INFO L225 Difference]: With dead ends: 104 [2021-08-30 17:27:29,366 INFO L226 Difference]: Without dead ends: 104 [2021-08-30 17:27:29,366 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 96.28ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:27:29,367 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 138 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.35ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.87ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:29,367 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 23 Invalid, 293 Unknown, 0 Unchecked, 1.35ms Time], IncrementalHoareTripleChecker [13 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 153.87ms Time] [2021-08-30 17:27:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-30 17:27:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2021-08-30 17:27:29,369 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) [2021-08-30 17:27:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-30 17:27:29,369 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2021-08-30 17:27:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:29,370 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-30 17:27:29,370 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) [2021-08-30 17:27:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-30 17:27:29,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-30 17:27:29,370 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:29,370 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:29,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:29,580 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 [2021-08-30 17:27:29,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:29,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1219116994, now seen corresponding path program 1 times [2021-08-30 17:27:29,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:29,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458105640] [2021-08-30 17:27:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:29,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:29,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:29,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458105640] [2021-08-30 17:27:29,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458105640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:29,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856889805] [2021-08-30 17:27:29,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:29,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:29,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:29,637 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) [2021-08-30 17:27:29,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 17:27:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:29,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 17:27:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:29,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:27:29,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856889805] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:29,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:27:29,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-08-30 17:27:29,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043664721] [2021-08-30 17:27:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:27:29,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:27:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:27:29,779 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) [2021-08-30 17:27:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:29,856 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-08-30 17:27:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 17:27:29,864 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 [2021-08-30 17:27:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:29,865 INFO L225 Difference]: With dead ends: 97 [2021-08-30 17:27:29,865 INFO L226 Difference]: Without dead ends: 97 [2021-08-30 17:27:29,865 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.37ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:27:29,865 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.16ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:29,866 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 9 Invalid, 146 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 72.16ms Time] [2021-08-30 17:27:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-30 17:27:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2021-08-30 17:27:29,868 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) [2021-08-30 17:27:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-08-30 17:27:29,868 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2021-08-30 17:27:29,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:29,868 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-08-30 17:27:29,868 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) [2021-08-30 17:27:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-08-30 17:27:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 17:27:29,869 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:29,869 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:29,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:30,069 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 [2021-08-30 17:27:30,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1721559171, now seen corresponding path program 1 times [2021-08-30 17:27:30,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:30,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759894609] [2021-08-30 17:27:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:30,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:30,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:30,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759894609] [2021-08-30 17:27:30,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759894609] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:30,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24477358] [2021-08-30 17:27:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:30,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:30,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:30,185 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) [2021-08-30 17:27:30,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 17:27:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:30,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-30 17:27:30,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:30,321 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:27:30,321 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 [2021-08-30 17:27:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:30,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:27:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:30,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24477358] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:27:30,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:27:30,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2021-08-30 17:27:30,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675170585] [2021-08-30 17:27:30,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-30 17:27:30,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:30,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-30 17:27:30,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-30 17:27:30,616 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:27:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:31,251 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2021-08-30 17:27:31,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 17:27:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-30 17:27:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:31,253 INFO L225 Difference]: With dead ends: 112 [2021-08-30 17:27:31,253 INFO L226 Difference]: Without dead ends: 112 [2021-08-30 17:27:31,253 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 433.02ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-30 17:27:31,254 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 206 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 262.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.70ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 329.77ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:31,254 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 28 Invalid, 739 Unknown, 0 Unchecked, 3.70ms Time], IncrementalHoareTripleChecker [37 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 329.77ms Time] [2021-08-30 17:27:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-30 17:27:31,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2021-08-30 17:27:31,256 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) [2021-08-30 17:27:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-08-30 17:27:31,257 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2021-08-30 17:27:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:31,257 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-08-30 17:27:31,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:27:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-08-30 17:27:31,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:27:31,257 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:31,257 INFO L513 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] [2021-08-30 17:27:31,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:31,465 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 [2021-08-30 17:27:31,465 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222077, now seen corresponding path program 1 times [2021-08-30 17:27:31,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:31,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027135602] [2021-08-30 17:27:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:31,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 17:27:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:27:31,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:31,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027135602] [2021-08-30 17:27:31,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027135602] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:31,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:31,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 17:27:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225434449] [2021-08-30 17:27:31,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:27:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:27:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 17:27:31,519 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) [2021-08-30 17:27:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:31,666 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-08-30 17:27:31,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 17:27:31,667 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 [2021-08-30 17:27:31,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:31,667 INFO L225 Difference]: With dead ends: 71 [2021-08-30 17:27:31,668 INFO L226 Difference]: Without dead ends: 71 [2021-08-30 17:27:31,668 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.71ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:27:31,668 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.91ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:31,668 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 11 Invalid, 207 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 82.91ms Time] [2021-08-30 17:27:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-30 17:27:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-30 17:27:31,681 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) [2021-08-30 17:27:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-08-30 17:27:31,683 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2021-08-30 17:27:31,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:31,683 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-08-30 17:27:31,683 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) [2021-08-30 17:27:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-08-30 17:27:31,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 17:27:31,684 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:31,684 INFO L513 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] [2021-08-30 17:27:31,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 17:27:31,684 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:31,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1762222076, now seen corresponding path program 1 times [2021-08-30 17:27:31,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:31,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592949133] [2021-08-30 17:27:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:31,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 17:27:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:27:31,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:31,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592949133] [2021-08-30 17:27:31,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592949133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:31,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:31,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 17:27:31,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11776807] [2021-08-30 17:27:31,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 17:27:31,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 17:27:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-30 17:27:31,766 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) [2021-08-30 17:27:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:31,942 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-08-30 17:27:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 17:27:31,942 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 [2021-08-30 17:27:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:31,943 INFO L225 Difference]: With dead ends: 74 [2021-08-30 17:27:31,943 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 17:27:31,943 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 93.99ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-30 17:27:31,944 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.10ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:31,944 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 15 Invalid, 176 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 104.10ms Time] [2021-08-30 17:27:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 17:27:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2021-08-30 17:27:31,945 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) [2021-08-30 17:27:31,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-08-30 17:27:31,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2021-08-30 17:27:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:31,946 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-08-30 17:27:31,946 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) [2021-08-30 17:27:31,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-08-30 17:27:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 17:27:31,946 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:31,946 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:31,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 17:27:31,946 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash 764805398, now seen corresponding path program 2 times [2021-08-30 17:27:31,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:31,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476020960] [2021-08-30 17:27:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:31,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:31,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:32,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:32,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:32,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476020960] [2021-08-30 17:27:32,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476020960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:32,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826414747] [2021-08-30 17:27:32,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 17:27:32,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:32,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:32,017 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) [2021-08-30 17:27:32,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 17:27:32,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 17:27:32,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:27:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:27:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:32,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:27:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:32,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826414747] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:27:32,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:27:32,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-08-30 17:27:32,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224577913] [2021-08-30 17:27:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 17:27:32,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 17:27:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:27:32,271 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-08-30 17:27:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:32,656 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-08-30 17:27:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 17:27:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 [2021-08-30 17:27:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:32,657 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:27:32,657 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:27:32,658 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 275.97ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-08-30 17:27:32,658 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 134.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.58ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:32,658 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 10 Invalid, 347 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [34 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 161.58ms Time] [2021-08-30 17:27:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:27:32,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-08-30 17:27:32,660 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) [2021-08-30 17:27:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2021-08-30 17:27:32,661 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 23 [2021-08-30 17:27:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:32,661 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2021-08-30 17:27:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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) [2021-08-30 17:27:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2021-08-30 17:27:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:27:32,662 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:32,662 INFO L513 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] [2021-08-30 17:27:32,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:32,869 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 [2021-08-30 17:27:32,870 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr11ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -972613003, now seen corresponding path program 1 times [2021-08-30 17:27:32,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:32,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095104225] [2021-08-30 17:27:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:32,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:32,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 17:27:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 17:27:32,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:32,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095104225] [2021-08-30 17:27:32,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095104225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:32,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 17:27:32,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 17:27:32,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412128235] [2021-08-30 17:27:32,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 17:27:32,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:32,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 17:27:32,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 17:27:32,918 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) [2021-08-30 17:27:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:33,036 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-08-30 17:27:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 17:27:33,036 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 [2021-08-30 17:27:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:33,037 INFO L225 Difference]: With dead ends: 80 [2021-08-30 17:27:33,037 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 17:27:33,037 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.20ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-30 17:27:33,040 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.63ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.20ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:33,040 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 5 Invalid, 97 Unknown, 0 Unchecked, 0.63ms Time], IncrementalHoareTripleChecker [11 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 57.20ms Time] [2021-08-30 17:27:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 17:27:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-30 17:27:33,043 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) [2021-08-30 17:27:33,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2021-08-30 17:27:33,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 25 [2021-08-30 17:27:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2021-08-30 17:27:33,044 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) [2021-08-30 17:27:33,044 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2021-08-30 17:27:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:27:33,048 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:33,048 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:33,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 17:27:33,049 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fooErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 538529121, now seen corresponding path program 1 times [2021-08-30 17:27:33,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:33,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236183779] [2021-08-30 17:27:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:33,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 17:27:33,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236183779] [2021-08-30 17:27:33,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236183779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:33,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806259920] [2021-08-30 17:27:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:33,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:33,173 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) [2021-08-30 17:27:33,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 17:27:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:33,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-30 17:27:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:33,287 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:27:33,287 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 [2021-08-30 17:27:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-30 17:27:33,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 17:27:33,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806259920] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 17:27:33,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 17:27:33,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-08-30 17:27:33,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516345741] [2021-08-30 17:27:33,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 17:27:33,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:33,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 17:27:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-30 17:27:33,428 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) [2021-08-30 17:27:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:33,535 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2021-08-30 17:27:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 17:27:33,536 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 [2021-08-30 17:27:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:33,536 INFO L225 Difference]: With dead ends: 92 [2021-08-30 17:27:33,536 INFO L226 Difference]: Without dead ends: 92 [2021-08-30 17:27:33,537 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 81.24ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-30 17:27:33,537 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 79 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.48ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:33,537 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 23 Invalid, 187 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 87.48ms Time] [2021-08-30 17:27:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-30 17:27:33,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-08-30 17:27:33,539 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) [2021-08-30 17:27:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-30 17:27:33,539 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 25 [2021-08-30 17:27:33,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:33,539 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-30 17:27:33,539 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) [2021-08-30 17:27:33,539 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-30 17:27:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 17:27:33,540 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:33,540 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 17:27:33,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:33,748 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 [2021-08-30 17:27:33,749 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fooErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1438237711, now seen corresponding path program 3 times [2021-08-30 17:27:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733435549] [2021-08-30 17:27:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:33,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:33,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 17:27:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 17:27:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 17:27:33,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 17:27:33,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733435549] [2021-08-30 17:27:33,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733435549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 17:27:33,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235823742] [2021-08-30 17:27:33,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 17:27:33,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 17:27:33,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 17:27:33,868 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) [2021-08-30 17:27:33,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 17:27:33,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-30 17:27:33,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 17:27:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-30 17:27:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 17:27:33,980 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-30 17:27:33,980 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 [2021-08-30 17:27:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 17:27:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 17:27:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 17:27:34,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235823742] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 17:27:34,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 17:27:34,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2021-08-30 17:27:34,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66414469] [2021-08-30 17:27:34,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-30 17:27:34,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 17:27:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-30 17:27:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-08-30 17:27:34,345 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:27:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 17:27:35,465 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-08-30 17:27:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 17:27:35,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-08-30 17:27:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 17:27:35,466 INFO L225 Difference]: With dead ends: 111 [2021-08-30 17:27:35,466 INFO L226 Difference]: Without dead ends: 111 [2021-08-30 17:27:35,467 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 781.70ms TimeCoverageRelationStatistics Valid=366, Invalid=1040, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 17:27:35,467 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 190 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 399.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.35ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 482.84ms IncrementalHoareTripleChecker+Time [2021-08-30 17:27:35,467 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 15 Invalid, 1076 Unknown, 0 Unchecked, 4.35ms Time], IncrementalHoareTripleChecker [49 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 482.84ms Time] [2021-08-30 17:27:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-30 17:27:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-08-30 17:27:35,469 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) [2021-08-30 17:27:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-08-30 17:27:35,469 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 25 [2021-08-30 17:27:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 17:27:35,469 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-08-30 17:27:35,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 17:27:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-08-30 17:27:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 17:27:35,470 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 17:27:35,470 INFO L513 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] [2021-08-30 17:27:35,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 17:27:35,670 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 [2021-08-30 17:27:35,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr13ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE (and 16 more)] === [2021-08-30 17:27:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 17:27:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1621777527, now seen corresponding path program 1 times [2021-08-30 17:27:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 17:27:35,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778545297] [2021-08-30 17:27:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 17:27:35,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 17:27:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:27:35,690 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 17:27:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 17:27:35,713 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 17:27:35,713 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 17:27:35,714 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr13ASSERT_VIOLATIONMEMORY_FREE (20 of 21 remaining) [2021-08-30 17:27:35,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (19 of 21 remaining) [2021-08-30 17:27:35,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (18 of 21 remaining) [2021-08-30 17:27:35,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (17 of 21 remaining) [2021-08-30 17:27:35,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (16 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE (15 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE (14 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE (13 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE (12 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2021-08-30 17:27:35,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16ENSURES_VIOLATIONMEMORY_LEAK (4 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr0REQUIRES_VIOLATION (3 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr1REQUIRES_VIOLATION (2 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr2REQUIRES_VIOLATION (1 of 21 remaining) [2021-08-30 17:27:35,717 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location fooErr3REQUIRES_VIOLATION (0 of 21 remaining) [2021-08-30 17:27:35,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 17:27:35,722 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 17:27:35,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 05:27:35 BoogieIcfgContainer [2021-08-30 17:27:35,742 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 17:27:35,744 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 17:27:35,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 17:27:35,744 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 17:27:35,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 05:27:26" (3/4) ... [2021-08-30 17:27:35,746 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 17:27:35,782 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 17:27:35,782 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 17:27:35,783 INFO L158 Benchmark]: Toolchain (without parser) took 9928.28ms. Allocated memory was 60.8MB in the beginning and 113.2MB in the end (delta: 52.4MB). Free memory was 38.7MB in the beginning and 41.7MB in the end (delta: -3.1MB). Peak memory consumption was 48.8MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,783 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 17:27:35,783 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.96ms. Allocated memory is still 60.8MB. Free memory was 38.5MB in the beginning and 38.0MB in the end (delta: 517.6kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,783 INFO L158 Benchmark]: Boogie Preprocessor took 31.58ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 35.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,783 INFO L158 Benchmark]: RCFGBuilder took 371.13ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 35.4MB in the beginning and 54.6MB in the end (delta: -19.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,784 INFO L158 Benchmark]: TraceAbstraction took 9178.07ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 54.3MB in the beginning and 44.9MB in the end (delta: 9.4MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,784 INFO L158 Benchmark]: Witness Printer took 38.53ms. Allocated memory is still 113.2MB. Free memory was 44.9MB in the beginning and 41.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 17:27:35,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory was 43.4MB in the beginning and 43.4MB in the end (delta: 38.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.96ms. Allocated memory is still 60.8MB. Free memory was 38.5MB in the beginning and 38.0MB in the end (delta: 517.6kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.58ms. Allocated memory is still 60.8MB. Free memory was 38.0MB in the beginning and 35.4MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 371.13ms. Allocated memory was 60.8MB in the beginning and 83.9MB in the end (delta: 23.1MB). Free memory was 35.4MB in the beginning and 54.6MB in the end (delta: -19.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 9178.07ms. Allocated memory was 83.9MB in the beginning and 113.2MB in the end (delta: 29.4MB). Free memory was 54.3MB in the beginning and 44.9MB in the end (delta: 9.4MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. * Witness Printer took 38.53ms. Allocated memory is still 113.2MB. Free memory was 44.9MB in the beginning and 41.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=57, \old(a)=52, \old(b)=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: 9106.57ms, OverallIterations: 16, TraceHistogramMax: 3, EmptinessCheckTime: 30.28ms, AutomataDifference: 3977.35ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 9.11ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1304 SdHoareTripleChecker+Valid, 2260.55ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1293 mSDsluCounter, 216 SdHoareTripleChecker+Invalid, 1845.19ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1293 mSDsCounter, 222 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4296 IncrementalHoareTripleChecker+Invalid, 4518 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 222 mSolverCounterUnsat, 81 mSDtfsCounter, 4296 mSolverCounterSat, 31.35ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 375 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 2279.68ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=12, InterpolantAutomatonStates: 133, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 78.62ms AutomataMinimizationTime, 15 MinimizatonAttempts, 306 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 76.00ms SsaConstructionTime, 279.62ms SatisfiabilityAnalysisTime, 2493.72ms InterpolantComputationTime, 435 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 451 ConstructedInterpolants, 0 QuantifiedInterpolants, 3430 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1126 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 25 InterpolantComputations, 12 PerfectInterpolantSequences, 64/107 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! [2021-08-30 17:27:35,812 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...