./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.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 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:43:19,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:43:19,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:43:19,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:43:19,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:43:19,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:43:19,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:43:19,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:43:19,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:43:19,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:43:19,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:43:19,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:43:19,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:43:19,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:43:19,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:43:19,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:43:19,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:43:19,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:43:19,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:43:19,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:43:19,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:43:19,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:43:19,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:43:19,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:43:19,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:43:19,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:43:19,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:43:19,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:43:19,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:43:19,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:43:19,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:43:19,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:43:19,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:43:19,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:43:19,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:43:19,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:43:19,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:43:19,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:43:19,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:43:19,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:43:19,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:43:19,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:43:19,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:43:19,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:43:19,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:43:19,698 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:43:19,700 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:43:19,700 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:43:19,700 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:43:19,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:43:19,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:43:19,700 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:43:19,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:43:19,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:43:19,701 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:43:19,702 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:43:19,702 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:43:19,720 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:43:19,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:43:19,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:43:19,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:43:19,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:43:19,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:43:19,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:43:19,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 [2021-08-27 04:43:20,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:43:20,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:43:20,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:43:20,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:43:20,051 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:43:20,051 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-08-27 04:43:20,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4248d2eb8/45667cf6768f4b44b0b6eb8e932c17f8/FLAG8dc053ce7 [2021-08-27 04:43:20,487 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:43:20,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-08-27 04:43:20,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4248d2eb8/45667cf6768f4b44b0b6eb8e932c17f8/FLAG8dc053ce7 [2021-08-27 04:43:20,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4248d2eb8/45667cf6768f4b44b0b6eb8e932c17f8 [2021-08-27 04:43:20,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:43:20,847 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:43:20,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:43:20,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:43:20,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:43:20,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:43:20" (1/1) ... [2021-08-27 04:43:20,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32baf09a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:20, skipping insertion in model container [2021-08-27 04:43:20,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:43:20" (1/1) ... [2021-08-27 04:43:20,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:43:20,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:43:21,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:43:21,024 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:43:21,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:43:21,109 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:43:21,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21 WrapperNode [2021-08-27 04:43:21,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:43:21,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:43:21,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:43:21,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:43:21,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:43:21,145 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:43:21,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:43:21,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:43:21,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (1/1) ... [2021-08-27 04:43:21,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:43:21,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:21,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:43:21,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:43:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:43:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:43:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:43:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:43:21,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:43:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:43:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:43:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2021-08-27 04:43:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-08-27 04:43:21,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:43:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:43:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:43:21,201 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:43:21,202 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:43:21,203 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:43:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:43:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:43:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:43:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:43:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:43:21,209 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:43:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:43:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:43:21,212 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:43:21,213 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2021-08-27 04:43:21,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:43:21,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:43:21,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:43:21,656 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:43:21,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:21 BoogieIcfgContainer [2021-08-27 04:43:21,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:43:21,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:43:21,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:43:21,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:43:21,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:43:20" (1/3) ... [2021-08-27 04:43:21,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb2fa58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:43:21, skipping insertion in model container [2021-08-27 04:43:21,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:43:21" (2/3) ... [2021-08-27 04:43:21,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb2fa58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:43:21, skipping insertion in model container [2021-08-27 04:43:21,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:21" (3/3) ... [2021-08-27 04:43:21,663 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2021-08-27 04:43:21,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:43:21,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-08-27 04:43:21,694 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:43:21,709 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:43:21,709 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-08-27 04:43:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 04:43:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:21,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:21,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:21,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting build_nondet_StringErr2REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999972, now seen corresponding path program 1 times [2021-08-27 04:43:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:21,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427172294] [2021-08-27 04:43:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:21,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:21,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:21,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427172294] [2021-08-27 04:43:21,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427172294] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:21,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:21,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:43:21,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580750215] [2021-08-27 04:43:21,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:43:21,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:43:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:21,936 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 1.8) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:22,079 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2021-08-27 04:43:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:43:22,081 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, (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 11 [2021-08-27 04:43:22,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:22,088 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:43:22,088 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:43:22,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:43:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:43:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-08-27 04:43:22,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-08-27 04:43:22,121 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 11 [2021-08-27 04:43:22,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:22,121 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-08-27 04:43:22,122 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-08-27 04:43:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:22,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:22,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:22,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:43:22,123 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting build_nondet_StringErr3REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:22,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999971, now seen corresponding path program 1 times [2021-08-27 04:43:22,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:22,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027178489] [2021-08-27 04:43:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:22,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:22,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:22,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027178489] [2021-08-27 04:43:22,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027178489] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:22,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:22,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:22,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857608541] [2021-08-27 04:43:22,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:22,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:22,227 INFO L87 Difference]: Start difference. First operand 68 states and 74 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:22,320 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-08-27 04:43:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:22,321 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, (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 11 [2021-08-27 04:43:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:22,322 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:43:22,322 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:43:22,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:43:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-27 04:43:22,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.641025641025641) internal successors, (64), 58 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2021-08-27 04:43:22,333 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 11 [2021-08-27 04:43:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:22,334 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2021-08-27 04:43:22,334 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2021-08-27 04:43:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:22,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:22,335 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:22,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:43:22,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1361999918, now seen corresponding path program 1 times [2021-08-27 04:43:22,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:22,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675844475] [2021-08-27 04:43:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:22,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:22,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:22,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675844475] [2021-08-27 04:43:22,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675844475] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:22,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:22,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:43:22,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259528503] [2021-08-27 04:43:22,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:22,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:22,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:22,420 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:22,548 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-08-27 04:43:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:22,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 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 11 [2021-08-27 04:43:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:22,553 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:43:22,553 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 04:43:22,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 04:43:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2021-08-27 04:43:22,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 60 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-08-27 04:43:22,573 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 11 [2021-08-27 04:43:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:22,573 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-08-27 04:43:22,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-08-27 04:43:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:43:22,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:22,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:22,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:43:22,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:22,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:22,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1361940336, now seen corresponding path program 1 times [2021-08-27 04:43:22,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:22,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207112492] [2021-08-27 04:43:22,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:22,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:22,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:22,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207112492] [2021-08-27 04:43:22,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207112492] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:22,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:43:22,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581386468] [2021-08-27 04:43:22,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:43:22,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:43:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:43:22,662 INFO L87 Difference]: Start difference. First operand 69 states and 75 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:22,778 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-08-27 04:43:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:43:22,779 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, (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 11 [2021-08-27 04:43:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:22,779 INFO L225 Difference]: With dead ends: 77 [2021-08-27 04:43:22,780 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 04:43:22,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:43:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 04:43:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-08-27 04:43:22,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 62 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-08-27 04:43:22,783 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 11 [2021-08-27 04:43:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:22,784 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-08-27 04:43:22,784 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-08-27 04:43:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:43:22,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:22,785 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:22,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:43:22,785 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting build_nondet_StringErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:22,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash 670453331, now seen corresponding path program 1 times [2021-08-27 04:43:22,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:22,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251270463] [2021-08-27 04:43:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:22,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:22,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:22,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251270463] [2021-08-27 04:43:22,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251270463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:22,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106477217] [2021-08-27 04:43:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:22,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:22,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:22,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:22,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:43:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 04:43:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:23,081 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:43:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:23,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106477217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:23,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:23,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:43:23,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91496053] [2021-08-27 04:43:23,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:43:23,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:23,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:43:23,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:43:23,174 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:23,337 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-08-27 04:43:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:43:23,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (4), 2 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 15 [2021-08-27 04:43:23,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:23,339 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:43:23,339 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:43:23,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:43:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:43:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-08-27 04:43:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 59 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-08-27 04:43:23,342 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 15 [2021-08-27 04:43:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:23,343 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-08-27 04:43:23,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-08-27 04:43:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:43:23,351 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:23,351 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 04:43:23,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:23,570 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:23,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash 140003118, now seen corresponding path program 1 times [2021-08-27 04:43:23,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:23,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904808021] [2021-08-27 04:43:23,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:23,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:43:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:43:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:23,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904808021] [2021-08-27 04:43:23,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904808021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:23,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166963601] [2021-08-27 04:43:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:23,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:23,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:23,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:43:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 04:43:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:23,897 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:43:24,010 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 04:43:24,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 04:43:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:24,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166963601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:24,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:24,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-08-27 04:43:24,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309188088] [2021-08-27 04:43:24,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:43:24,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:43:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:43:24,116 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:43:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:24,523 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-08-27 04:43:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:43:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-08-27 04:43:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:24,524 INFO L225 Difference]: With dead ends: 65 [2021-08-27 04:43:24,524 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:43:24,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:43:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:43:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-27 04:43:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 56 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-08-27 04:43:24,527 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 28 [2021-08-27 04:43:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:24,527 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-08-27 04:43:24,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 13 states have internal predecessors, (34), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:43:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-08-27 04:43:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:43:24,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:24,528 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:24,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:24,746 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,SelfDestructingSolverStorable5 [2021-08-27 04:43:24,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash 140003119, now seen corresponding path program 1 times [2021-08-27 04:43:24,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:24,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596491320] [2021-08-27 04:43:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:24,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:43:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:43:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:24,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:24,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596491320] [2021-08-27 04:43:24,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596491320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:24,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370291322] [2021-08-27 04:43:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:24,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:24,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:24,983 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:24,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:43:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:43:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:25,184 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:43:25,190 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 0 case distinctions, treesize of input 10 treesize of output 9 [2021-08-27 04:43:25,402 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:43:25,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-08-27 04:43:25,409 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 04:43:25,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-08-27 04:43:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:25,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370291322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:25,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:25,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 17 [2021-08-27 04:43:25,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604979836] [2021-08-27 04:43:25,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:43:25,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:25,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:43:25,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:43:25,438 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:43:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:26,005 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-08-27 04:43:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:43:26,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-08-27 04:43:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:26,006 INFO L225 Difference]: With dead ends: 90 [2021-08-27 04:43:26,006 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 04:43:26,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:43:26,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 04:43:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 67. [2021-08-27 04:43:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 58 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:26,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-08-27 04:43:26,010 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 28 [2021-08-27 04:43:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:26,010 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-08-27 04:43:26,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-27 04:43:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-08-27 04:43:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:43:26,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:26,011 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:26,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:26,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:26,229 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash 124645684, now seen corresponding path program 1 times [2021-08-27 04:43:26,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:26,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164884046] [2021-08-27 04:43:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:26,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:43:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:43:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 04:43:26,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:26,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164884046] [2021-08-27 04:43:26,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164884046] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:26,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:26,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:43:26,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870426027] [2021-08-27 04:43:26,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:43:26,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:43:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:43:26,345 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:26,572 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-08-27 04:43:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:43:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-08-27 04:43:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:26,575 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:43:26,575 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:43:26,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:43:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:43:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-08-27 04:43:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 55 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-08-27 04:43:26,577 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 32 [2021-08-27 04:43:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:26,578 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-08-27 04:43:26,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-08-27 04:43:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:43:26,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:26,578 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:26,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:43:26,578 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 124645685, now seen corresponding path program 1 times [2021-08-27 04:43:26,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:26,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157638380] [2021-08-27 04:43:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:26,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:43:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:43:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:43:26,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:26,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157638380] [2021-08-27 04:43:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157638380] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:26,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:26,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:43:26,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523051571] [2021-08-27 04:43:26,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:43:26,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:43:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:43:26,743 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:27,164 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2021-08-27 04:43:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:43:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-08-27 04:43:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:27,165 INFO L225 Difference]: With dead ends: 125 [2021-08-27 04:43:27,165 INFO L226 Difference]: Without dead ends: 125 [2021-08-27 04:43:27,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:43:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-27 04:43:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2021-08-27 04:43:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.4125) internal successors, (113), 91 states have internal predecessors, (113), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 04:43:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2021-08-27 04:43:27,179 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 32 [2021-08-27 04:43:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:27,179 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2021-08-27 04:43:27,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:27,180 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2021-08-27 04:43:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:43:27,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:27,184 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:27,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:43:27,185 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1155217993, now seen corresponding path program 1 times [2021-08-27 04:43:27,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:27,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631918291] [2021-08-27 04:43:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:27,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:27,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-08-27 04:43:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 04:43:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:43:27,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:27,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631918291] [2021-08-27 04:43:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631918291] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:43:27,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:43:27,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 04:43:27,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620634936] [2021-08-27 04:43:27,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:43:27,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:43:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:43:27,362 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:27,706 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2021-08-27 04:43:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:43:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-08-27 04:43:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:27,707 INFO L225 Difference]: With dead ends: 124 [2021-08-27 04:43:27,708 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 04:43:27,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:43:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 04:43:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 70. [2021-08-27 04:43:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 61 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:43:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-08-27 04:43:27,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 32 [2021-08-27 04:43:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:27,715 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-08-27 04:43:27,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 04:43:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-08-27 04:43:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:43:27,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:27,718 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:27,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:43:27,718 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0REQUIRES_VIOLATION === [build_nondet_StringErr0REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION (and 20 more)] === [2021-08-27 04:43:27,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash -431506202, now seen corresponding path program 1 times [2021-08-27 04:43:27,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:27,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078770773] [2021-08-27 04:43:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:27,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:43:27,726 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 04:43:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:43:27,742 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 04:43:27,742 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 04:43:27,743 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:43:27,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr0REQUIRES_VIOLATION [2021-08-27 04:43:27,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr1REQUIRES_VIOLATION [2021-08-27 04:43:27,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr2REQUIRES_VIOLATION [2021-08-27 04:43:27,744 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location build_nondet_StringErr3REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr0REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr1REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr2REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr3REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr4REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr5REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr6REQUIRES_VIOLATION [2021-08-27 04:43:27,745 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr7REQUIRES_VIOLATION [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr8REQUIRES_VIOLATION [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location cstrpbrkErr9REQUIRES_VIOLATION [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,746 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:43:27,747 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:43:27,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:43:27,751 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:43:27,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:43:27 BoogieIcfgContainer [2021-08-27 04:43:27,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:43:27,764 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:43:27,764 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:43:27,765 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:43:27,765 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:43:21" (3/4) ... [2021-08-27 04:43:27,766 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 04:43:27,787 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:43:27,787 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:43:27,787 INFO L168 Benchmark]: Toolchain (without parser) took 6940.40 ms. Allocated memory was 69.2 MB in the beginning and 186.6 MB in the end (delta: 117.4 MB). Free memory was 50.5 MB in the beginning and 132.2 MB in the end (delta: -81.7 MB). Peak memory consumption was 36.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,788 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:43:27,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.60 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 47.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,788 INFO L168 Benchmark]: Boogie Preprocessor took 34.20 ms. Allocated memory is still 69.2 MB. Free memory was 47.6 MB in the beginning and 45.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,788 INFO L168 Benchmark]: RCFGBuilder took 513.13 ms. Allocated memory was 69.2 MB in the beginning and 102.8 MB in the end (delta: 33.6 MB). Free memory was 45.0 MB in the beginning and 78.9 MB in the end (delta: -33.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,789 INFO L168 Benchmark]: TraceAbstraction took 6105.06 ms. Allocated memory was 102.8 MB in the beginning and 186.6 MB in the end (delta: 83.9 MB). Free memory was 78.3 MB in the beginning and 134.3 MB in the end (delta: -55.9 MB). Peak memory consumption was 28.0 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,789 INFO L168 Benchmark]: Witness Printer took 22.57 ms. Allocated memory is still 186.6 MB. Free memory was 134.3 MB in the beginning and 132.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:27,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 69.2 MB. Free memory is still 50.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 259.60 ms. Allocated memory is still 69.2 MB. Free memory was 50.3 MB in the beginning and 47.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.20 ms. Allocated memory is still 69.2 MB. Free memory was 47.6 MB in the beginning and 45.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 513.13 ms. Allocated memory was 69.2 MB in the beginning and 102.8 MB in the end (delta: 33.6 MB). Free memory was 45.0 MB in the beginning and 78.9 MB in the end (delta: -33.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6105.06 ms. Allocated memory was 102.8 MB in the beginning and 186.6 MB in the end (delta: 83.9 MB). Free memory was 78.3 MB in the beginning and 134.3 MB in the end (delta: -55.9 MB). Peak memory consumption was 28.0 MB. Max. memory is 16.1 GB. * Witness Printer took 22.57 ms. Allocated memory is still 186.6 MB. Free memory was 134.3 MB in the beginning and 132.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L546] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-1:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-1:0}] [L528] return nondetString; VAL [\result={-1:0}, i=0, length=1, nondetString={-1:0}] [L546] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L546] char* s1 = build_nondet_String(); [L547] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, nondetString={-2:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, nondetString={-2:0}] [L527] nondetString[length-1] = '\0' VAL [i=0, length=1, nondetString={-2:0}] [L528] return nondetString; VAL [\result={-2:0}, i=0, length=1, nondetString={-2:0}] [L547] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-2:0}, s1={-1:0}] [L547] char* s2 = build_nondet_String(); [L548] CALL cstrpbrk(s1,s2) VAL [s1={-1:0}, s2={-2:0}] [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 VAL [s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] EXPR \read(*sc1) VAL [\read(*sc1)=0, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; VAL [\result={0:0}, s1={-1:0}, s1={-1:0}, s2={-2:0}, s2={-2:0}, sc1={-1:0}] [L548] RET cstrpbrk(s1,s2) VAL [cstrpbrk(s1,s2)={0:0}, s1={-1:0}, s2={-2:0}] - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 523]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 527]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 535]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 88 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 6056.2ms, OverallIterations: 11, TraceHistogramMax: 2, EmptinessCheckTime: 29.2ms, AutomataDifference: 2655.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 486 SDtfs, 1284 SDslu, 1068 SDs, 0 SdLazy, 2992 SolverSat, 134 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 1489.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1258.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=9, InterpolantAutomatonStates: 82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.1ms AutomataMinimizationTime, 10 MinimizatonAttempts, 120 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.9ms SsaConstructionTime, 154.0ms SatisfiabilityAnalysisTime, 1820.3ms InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 269 ConstructedInterpolants, 14 QuantifiedInterpolants, 1647 SizeOfPredicates, 14 NumberOfNonLiveVariables, 339 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 38/60 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 04:43:27,815 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...