./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.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/openbsd_cstrlen-alloca-1.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 b812e7d14425eea3a24125f5e2db40eadfc6c14c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:56:15,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:56:15,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:56:15,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:56:15,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:56:15,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:56:15,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:56:15,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:56:15,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:56:15,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:56:15,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:56:15,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:56:15,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:56:15,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:56:15,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:56:15,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:56:15,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:56:15,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:56:15,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:56:15,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:56:15,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:56:15,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:56:15,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:56:15,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:56:15,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:56:15,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:56:15,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:56:15,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:56:15,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:56:15,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:56:15,639 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:56:15,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:56:15,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:56:15,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:56:15,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:56:15,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:56:15,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:56:15,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:56:15,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:56:15,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:56:15,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:56:15,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:56:15,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:56:15,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:56:15,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:56:15,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:56:15,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:56:15,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:56:15,670 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:56:15,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:56:15,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:56:15,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:56:15,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:56:15,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:56:15,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:56:15,671 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:56:15,671 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:56:15,671 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:56:15,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:56:15,672 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:56:15,672 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:56:15,672 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:56:15,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:56:15,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:56:15,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:56:15,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:56:15,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:56:15,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:56:15,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:56:15,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:56:15,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:56:15,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b812e7d14425eea3a24125f5e2db40eadfc6c14c [2021-08-27 04:56:15,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:56:15,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:56:15,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:56:15,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:56:15,979 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:56:15,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-08-27 04:56:16,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cd67c021/45c7a5118c3a4c8b800ccd64991c171f/FLAG332d0ce19 [2021-08-27 04:56:16,528 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:56:16,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2021-08-27 04:56:16,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cd67c021/45c7a5118c3a4c8b800ccd64991c171f/FLAG332d0ce19 [2021-08-27 04:56:17,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1cd67c021/45c7a5118c3a4c8b800ccd64991c171f [2021-08-27 04:56:17,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:56:17,027 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:56:17,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:56:17,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:56:17,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:56:17,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e356fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17, skipping insertion in model container [2021-08-27 04:56:17,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:56:17,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:56:17,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:56:17,324 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:56:17,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:56:17,374 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:56:17,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17 WrapperNode [2021-08-27 04:56:17,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:56:17,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:56:17,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:56:17,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:56:17,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:56:17,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:56:17,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:56:17,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:56:17,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (1/1) ... [2021-08-27 04:56:17,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:56:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:17,441 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 04:56:17,449 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 04:56:17,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:56:17,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:56:17,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:56:17,492 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:56:17,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:56:17,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:56:17,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:56:17,493 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2021-08-27 04:56:17,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:56:17,493 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:56:17,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:56:17,495 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:56:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:56:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:56:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:56:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:56:17,496 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:56:17,497 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:56:17,498 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:56:17,499 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:56:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:56:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:56:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:56:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:56:17,500 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:56:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:56:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:56:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:56:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:56:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:56:17,502 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:56:17,503 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:56:17,504 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:56:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:56:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:56:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:56:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:56:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:56:17,510 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:56:17,511 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:56:17,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:56:17,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:56:17,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:56:17,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:56:17,876 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:56:17,876 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 04:56:17,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:17 BoogieIcfgContainer [2021-08-27 04:56:17,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:56:17,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:56:17,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:56:17,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:56:17,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:56:17" (1/3) ... [2021-08-27 04:56:17,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54957c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:56:17, skipping insertion in model container [2021-08-27 04:56:17,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:56:17" (2/3) ... [2021-08-27 04:56:17,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54957c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:56:17, skipping insertion in model container [2021-08-27 04:56:17,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:17" (3/3) ... [2021-08-27 04:56:17,885 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2021-08-27 04:56:17,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:56:17,889 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-27 04:56:17,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:56:17,924 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 04:56:17,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-27 04:56:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:56:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:56:17,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:17,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:17,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006156, now seen corresponding path program 1 times [2021-08-27 04:56:17,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:17,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219945801] [2021-08-27 04:56:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:17,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,160 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 04:56:18,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:18,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219945801] [2021-08-27 04:56:18,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219945801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:18,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:18,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:56:18,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567946168] [2021-08-27 04:56:18,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:56:18,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:56:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:18,180 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:18,257 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-08-27 04:56:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:18,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:56:18,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:18,272 INFO L225 Difference]: With dead ends: 31 [2021-08-27 04:56:18,273 INFO L226 Difference]: Without dead ends: 28 [2021-08-27 04:56:18,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:56:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-27 04:56:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-27 04:56:18,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 04:56:18,307 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2021-08-27 04:56:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 04:56:18,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-27 04:56:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:56:18,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:18,310 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:18,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:56:18,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:18,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006155, now seen corresponding path program 1 times [2021-08-27 04:56:18,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:18,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322201658] [2021-08-27 04:56:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:18,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,429 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 04:56:18,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:18,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322201658] [2021-08-27 04:56:18,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322201658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:18,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:18,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:18,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214399437] [2021-08-27 04:56:18,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:18,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:18,438 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:18,513 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-08-27 04:56:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:56:18,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:56:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:18,515 INFO L225 Difference]: With dead ends: 27 [2021-08-27 04:56:18,515 INFO L226 Difference]: Without dead ends: 27 [2021-08-27 04:56:18,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-27 04:56:18,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-27 04:56:18,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:18,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-27 04:56:18,522 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2021-08-27 04:56:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:18,523 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-27 04:56:18,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-27 04:56:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:56:18,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:18,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:18,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:56:18,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006102, now seen corresponding path program 1 times [2021-08-27 04:56:18,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:18,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729204625] [2021-08-27 04:56:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:18,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,587 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 04:56:18,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:18,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729204625] [2021-08-27 04:56:18,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729204625] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:18,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:18,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:18,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99741718] [2021-08-27 04:56:18,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:18,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:18,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:18,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:18,590 INFO L87 Difference]: Start difference. First operand 27 states and 29 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:18,656 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-08-27 04:56:18,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:56:18,659 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:56:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:18,661 INFO L225 Difference]: With dead ends: 34 [2021-08-27 04:56:18,661 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 04:56:18,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 04:56:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-08-27 04:56:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-08-27 04:56:18,679 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2021-08-27 04:56:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:18,680 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-08-27 04:56:18,680 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-08-27 04:56:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:56:18,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:18,681 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:18,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:56:18,682 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:18,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2094946520, now seen corresponding path program 1 times [2021-08-27 04:56:18,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:18,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964357214] [2021-08-27 04:56:18,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:18,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,794 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 04:56:18,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:18,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964357214] [2021-08-27 04:56:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964357214] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:18,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:18,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469197300] [2021-08-27 04:56:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:56:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:56:18,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:18,797 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:18,880 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-08-27 04:56:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 04:56:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:18,882 INFO L225 Difference]: With dead ends: 38 [2021-08-27 04:56:18,882 INFO L226 Difference]: Without dead ends: 38 [2021-08-27 04:56:18,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-27 04:56:18,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-08-27 04:56:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:18,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-27 04:56:18,886 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2021-08-27 04:56:18,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:18,886 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-27 04:56:18,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:18,887 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-27 04:56:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:18,887 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:18,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:18,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:56:18,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting cstrlenErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386996, now seen corresponding path program 1 times [2021-08-27 04:56:18,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:18,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29333090] [2021-08-27 04:56:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:18,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:18,933 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 04:56:18,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:18,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29333090] [2021-08-27 04:56:18,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29333090] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:18,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:18,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:56:18,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733726031] [2021-08-27 04:56:18,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:56:18,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:56:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:56:18,936 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:19,018 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-08-27 04:56:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:19,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:56:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:19,020 INFO L225 Difference]: With dead ends: 30 [2021-08-27 04:56:19,020 INFO L226 Difference]: Without dead ends: 30 [2021-08-27 04:56:19,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-27 04:56:19,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-27 04:56:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-08-27 04:56:19,023 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2021-08-27 04:56:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:19,023 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-08-27 04:56:19,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-08-27 04:56:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:56:19,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:19,024 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:19,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:56:19,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386997, now seen corresponding path program 1 times [2021-08-27 04:56:19,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:19,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675148998] [2021-08-27 04:56:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:19,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:19,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:19,108 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 04:56:19,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:19,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675148998] [2021-08-27 04:56:19,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675148998] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:19,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:19,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:56:19,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360401942] [2021-08-27 04:56:19,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:56:19,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:56:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:19,111 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:19,233 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-08-27 04:56:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:56:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:56:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:19,236 INFO L225 Difference]: With dead ends: 36 [2021-08-27 04:56:19,236 INFO L226 Difference]: Without dead ends: 36 [2021-08-27 04:56:19,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:56:19,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-27 04:56:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-08-27 04:56:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-08-27 04:56:19,250 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2021-08-27 04:56:19,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:19,250 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-08-27 04:56:19,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-08-27 04:56:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:56:19,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:19,251 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:19,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:56:19,251 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:19,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1041914347, now seen corresponding path program 1 times [2021-08-27 04:56:19,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:19,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668646805] [2021-08-27 04:56:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:19,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:19,319 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 04:56:19,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:19,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668646805] [2021-08-27 04:56:19,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668646805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:19,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105662852] [2021-08-27 04:56:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:19,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:19,322 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 04:56:19,336 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 04:56:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:56:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:19,560 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 04:56:19,712 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 04:56:19,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105662852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:19,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:19,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:56:19,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146239177] [2021-08-27 04:56:19,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:56:19,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:56:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:56:19,714 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (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 04:56:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:19,821 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-08-27 04:56:19,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:56:19,822 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, (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 14 [2021-08-27 04:56:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:19,824 INFO L225 Difference]: With dead ends: 37 [2021-08-27 04:56:19,824 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 04:56:19,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:56:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 04:56:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-08-27 04:56:19,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-27 04:56:19,835 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-08-27 04:56:19,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:19,835 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-27 04:56:19,835 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, (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 04:56:19,835 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-27 04:56:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:56:19,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:19,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:19,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:20,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:20,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash -2015340679, now seen corresponding path program 1 times [2021-08-27 04:56:20,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:20,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290741676] [2021-08-27 04:56:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:20,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:20,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:20,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:20,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290741676] [2021-08-27 04:56:20,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290741676] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:20,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:20,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:56:20,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032140877] [2021-08-27 04:56:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:56:20,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:56:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:56:20,179 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:20,338 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-27 04:56:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:56:20,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 04:56:20,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:20,340 INFO L225 Difference]: With dead ends: 39 [2021-08-27 04:56:20,340 INFO L226 Difference]: Without dead ends: 39 [2021-08-27 04:56:20,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:56:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-27 04:56:20,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-08-27 04:56:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:56:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-27 04:56:20,351 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2021-08-27 04:56:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:20,352 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-27 04:56:20,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-27 04:56:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:56:20,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:20,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:20,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:56:20,353 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1886599607, now seen corresponding path program 1 times [2021-08-27 04:56:20,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:20,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013511481] [2021-08-27 04:56:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:20,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:20,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:20,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013511481] [2021-08-27 04:56:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013511481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:20,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:56:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267513174] [2021-08-27 04:56:20,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:56:20,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:56:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:56:20,531 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:20,697 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-27 04:56:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:56:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-08-27 04:56:20,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:20,698 INFO L225 Difference]: With dead ends: 51 [2021-08-27 04:56:20,698 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 04:56:20,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:56:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 04:56:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 37. [2021-08-27 04:56:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:56:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-08-27 04:56:20,701 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 16 [2021-08-27 04:56:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:20,702 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-08-27 04:56:20,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-08-27 04:56:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 04:56:20,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:20,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:20,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:56:20,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash 280521542, now seen corresponding path program 1 times [2021-08-27 04:56:20,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:20,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226522369] [2021-08-27 04:56:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:20,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 04:56:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,755 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 04:56:20,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:20,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226522369] [2021-08-27 04:56:20,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226522369] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:56:20,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:56:20,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:56:20,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739442812] [2021-08-27 04:56:20,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:56:20,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:56:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:20,758 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:20,794 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-08-27 04:56:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:56:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-08-27 04:56:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:20,795 INFO L225 Difference]: With dead ends: 36 [2021-08-27 04:56:20,795 INFO L226 Difference]: Without dead ends: 21 [2021-08-27 04:56:20,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:56:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-27 04:56:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-27 04:56:20,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:20,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-27 04:56:20,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-08-27 04:56:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:20,797 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-27 04:56:20,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:56:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-27 04:56:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:56:20,798 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:20,798 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:20,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:56:20,799 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:20,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1912442426, now seen corresponding path program 1 times [2021-08-27 04:56:20,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:20,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784516670] [2021-08-27 04:56:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:20,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:20,942 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 04:56:20,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784516670] [2021-08-27 04:56:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784516670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337511936] [2021-08-27 04:56:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:20,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:20,944 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 04:56:20,945 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 04:56:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:21,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:56:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:21,331 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 04:56:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337511936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:21,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:21,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:56:21,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475709554] [2021-08-27 04:56:21,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:56:21,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:21,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:56:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:56:21,337 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:21,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:21,484 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-27 04:56:21,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:56:21,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 04:56:21,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:21,485 INFO L225 Difference]: With dead ends: 29 [2021-08-27 04:56:21,485 INFO L226 Difference]: Without dead ends: 29 [2021-08-27 04:56:21,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:56:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-27 04:56:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-08-27 04:56:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-27 04:56:21,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2021-08-27 04:56:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:21,488 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-27 04:56:21,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-27 04:56:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:56:21,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:21,489 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:21,516 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 04:56:21,712 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,SelfDestructingSolverStorable10 [2021-08-27 04:56:21,713 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:21,713 INFO L82 PathProgramCache]: Analyzing trace with hash 831122644, now seen corresponding path program 2 times [2021-08-27 04:56:21,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:21,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382009136] [2021-08-27 04:56:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:21,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:21,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:21,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:21,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382009136] [2021-08-27 04:56:21,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382009136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:21,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103317961] [2021-08-27 04:56:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:21,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:21,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:21,943 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 04:56:21,944 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 04:56:22,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:56:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:56:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:22,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-08-27 04:56:22,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:56:22,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 33 [2021-08-27 04:56:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103317961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:22,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:22,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-27 04:56:22,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138128210] [2021-08-27 04:56:22,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:56:22,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:56:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:56:22,749 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:23,636 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-08-27 04:56:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:56:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-27 04:56:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:23,636 INFO L225 Difference]: With dead ends: 44 [2021-08-27 04:56:23,637 INFO L226 Difference]: Without dead ends: 36 [2021-08-27 04:56:23,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 872.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:56:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-27 04:56:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2021-08-27 04:56:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-27 04:56:23,639 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2021-08-27 04:56:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:23,639 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-27 04:56:23,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:23,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-27 04:56:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:56:23,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:23,641 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:23,658 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 04:56:23,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:23,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 976723133, now seen corresponding path program 3 times [2021-08-27 04:56:23,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:23,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499703601] [2021-08-27 04:56:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:23,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:24,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:24,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:24,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499703601] [2021-08-27 04:56:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499703601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:24,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899828639] [2021-08-27 04:56:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:56:24,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:24,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:24,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:56:24,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:56:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:24,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 04:56:24,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:56:24,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:56:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899828639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:24,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-08-27 04:56:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257404055] [2021-08-27 04:56:24,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:56:24,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:56:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:56:24,675 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:25,075 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-27 04:56:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:56:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-27 04:56:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:25,076 INFO L225 Difference]: With dead ends: 49 [2021-08-27 04:56:25,076 INFO L226 Difference]: Without dead ends: 38 [2021-08-27 04:56:25,077 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:56:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-27 04:56:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-08-27 04:56:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-08-27 04:56:25,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2021-08-27 04:56:25,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:25,080 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-08-27 04:56:25,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-08-27 04:56:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 04:56:25,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:25,081 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:25,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:25,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:25,297 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1134145536, now seen corresponding path program 4 times [2021-08-27 04:56:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:25,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353643803] [2021-08-27 04:56:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:25,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:25,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:25,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353643803] [2021-08-27 04:56:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353643803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:25,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074607299] [2021-08-27 04:56:25,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:56:25,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:25,499 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:25,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:56:25,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:56:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 04:56:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:25,695 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 04:56:25,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-08-27 04:56:26,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:56:26,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19 [2021-08-27 04:56:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:26,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074607299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:26,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:26,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2021-08-27 04:56:26,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055595193] [2021-08-27 04:56:26,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:56:26,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:26,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:56:26,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:56:26,318 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:26,976 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-08-27 04:56:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:56:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-08-27 04:56:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:26,981 INFO L225 Difference]: With dead ends: 40 [2021-08-27 04:56:26,981 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 04:56:26,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:56:26,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 04:56:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-08-27 04:56:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-27 04:56:26,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 34 [2021-08-27 04:56:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:26,987 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-27 04:56:26,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:26,987 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-27 04:56:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-27 04:56:26,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:26,988 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:27,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:27,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-27 04:56:27,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1178045774, now seen corresponding path program 5 times [2021-08-27 04:56:27,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:27,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397058079] [2021-08-27 04:56:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:27,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:27,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:27,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:27,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397058079] [2021-08-27 04:56:27,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397058079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:27,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426403403] [2021-08-27 04:56:27,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:56:27,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:27,465 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:27,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:56:27,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:56:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:56:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:27,704 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 04:56:27,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-08-27 04:56:28,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:56:28,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 19 [2021-08-27 04:56:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:28,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426403403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:28,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:28,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-08-27 04:56:28,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080105335] [2021-08-27 04:56:28,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:56:28,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:56:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=752, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:56:28,433 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:29,553 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-27 04:56:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:56:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-27 04:56:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:29,554 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:56:29,555 INFO L226 Difference]: Without dead ends: 50 [2021-08-27 04:56:29,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1143.5ms TimeCoverageRelationStatistics Valid=245, Invalid=2407, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:56:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-27 04:56:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-08-27 04:56:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-27 04:56:29,558 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 37 [2021-08-27 04:56:29,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:29,558 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-27 04:56:29,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-27 04:56:29,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 04:56:29,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:29,559 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:29,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:29,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 04:56:29,768 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1009410243, now seen corresponding path program 6 times [2021-08-27 04:56:29,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:29,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853903227] [2021-08-27 04:56:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:29,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:30,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:30,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:30,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853903227] [2021-08-27 04:56:30,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853903227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:30,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507866595] [2021-08-27 04:56:30,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:56:30,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:30,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:30,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:56:30,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-27 04:56:30,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 04:56:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:56:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:56:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:30,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507866595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:30,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:30,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-08-27 04:56:30,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991007349] [2021-08-27 04:56:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:56:30,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:56:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:56:30,810 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:31,332 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-08-27 04:56:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:56:31,333 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-27 04:56:31,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:31,333 INFO L225 Difference]: With dead ends: 69 [2021-08-27 04:56:31,333 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:56:31,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:56:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:56:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-08-27 04:56:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-08-27 04:56:31,336 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2021-08-27 04:56:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:31,337 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-08-27 04:56:31,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-08-27 04:56:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 04:56:31,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:31,338 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:31,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 04:56:31,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:31,541 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1167106758, now seen corresponding path program 7 times [2021-08-27 04:56:31,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:31,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928010404] [2021-08-27 04:56:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:31,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:31,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:31,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:31,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928010404] [2021-08-27 04:56:31,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928010404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:31,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5838802] [2021-08-27 04:56:31,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:56:31,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:31,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:31,801 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:31,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:56:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:56:32,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:32,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5838802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:32,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:32,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-27 04:56:32,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731996126] [2021-08-27 04:56:32,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:56:32,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:56:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:56:32,438 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 27 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:32,910 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-08-27 04:56:32,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:56:32,910 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-08-27 04:56:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:32,911 INFO L225 Difference]: With dead ends: 54 [2021-08-27 04:56:32,911 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 04:56:32,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:56:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 04:56:32,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-08-27 04:56:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-27 04:56:32,915 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2021-08-27 04:56:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:32,915 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-27 04:56:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 3.0) internal successors, (72), 24 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-27 04:56:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:56:32,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:32,918 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:32,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:33,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 04:56:33,142 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1517157576, now seen corresponding path program 8 times [2021-08-27 04:56:33,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:33,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318677917] [2021-08-27 04:56:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:33,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:33,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:33,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:33,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318677917] [2021-08-27 04:56:33,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318677917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587068413] [2021-08-27 04:56:33,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:56:33,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:33,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:33,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:33,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:56:33,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:56:33,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-27 04:56:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:34,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-08-27 04:56:35,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:56:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 33 [2021-08-27 04:56:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587068413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:35,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:35,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-08-27 04:56:35,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309851506] [2021-08-27 04:56:35,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:56:35,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:56:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:56:35,221 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 38 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:37,473 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2021-08-27 04:56:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 04:56:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:56:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:37,474 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:56:37,474 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:56:37,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1795.8ms TimeCoverageRelationStatistics Valid=327, Invalid=3579, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 04:56:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:56:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-08-27 04:56:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-08-27 04:56:37,478 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 51 [2021-08-27 04:56:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-08-27 04:56:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-08-27 04:56:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 04:56:37,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:56:37,479 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:56:37,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:37,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 04:56:37,693 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrlenErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK (and 2 more)] === [2021-08-27 04:56:37,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:56:37,693 INFO L82 PathProgramCache]: Analyzing trace with hash 470099401, now seen corresponding path program 9 times [2021-08-27 04:56:37,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:56:37,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547291997] [2021-08-27 04:56:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:56:37,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:56:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:56:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:56:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 13 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:56:38,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:56:38,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547291997] [2021-08-27 04:56:38,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547291997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:38,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058568746] [2021-08-27 04:56:38,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:56:38,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:38,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:56:38,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:56:38,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:56:38,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-27 04:56:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:56:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:56:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:56:38,458 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 04:56:38,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 19 [2021-08-27 04:56:39,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:56:39,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 26 [2021-08-27 04:56:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-08-27 04:56:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058568746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:56:39,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:56:39,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 29 [2021-08-27 04:56:39,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775215919] [2021-08-27 04:56:39,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:56:39,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:56:39,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:56:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:56:39,182 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 29 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:56:41,364 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-08-27 04:56:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-27 04:56:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-08-27 04:56:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:56:41,365 INFO L225 Difference]: With dead ends: 88 [2021-08-27 04:56:41,365 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:56:41,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 2102.5ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-08-27 04:56:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:56:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:56:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 04:56:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:56:41,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2021-08-27 04:56:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:56:41,367 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:56:41,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:56:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:56:41,368 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:56:41,370 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:56:41,370 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:56:41,370 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:56:41,371 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:56:41,371 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:56:41,371 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr0REQUIRES_VIOLATION [2021-08-27 04:56:41,371 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrlenErr1REQUIRES_VIOLATION [2021-08-27 04:56:41,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:56:41,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:56:41,587 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:56:41,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:56:41 BoogieIcfgContainer [2021-08-27 04:56:41,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:56:41,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:56:41,590 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:56:41,590 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:56:41,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:56:17" (3/4) ... [2021-08-27 04:56:41,592 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:56:41,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2021-08-27 04:56:41,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:56:41,599 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:56:41,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-08-27 04:56:41,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-27 04:56:41,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:56:41,603 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:56:41,656 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:56:41,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:56:41,657 INFO L168 Benchmark]: Toolchain (without parser) took 24630.29 ms. Allocated memory was 56.6 MB in the beginning and 224.4 MB in the end (delta: 167.8 MB). Free memory was 32.5 MB in the beginning and 198.8 MB in the end (delta: -166.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,658 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:56:41,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.65 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 30.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,659 INFO L168 Benchmark]: Boogie Preprocessor took 44.37 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 28.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,660 INFO L168 Benchmark]: RCFGBuilder took 458.09 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 28.5 MB in the beginning and 36.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,660 INFO L168 Benchmark]: TraceAbstraction took 23709.40 ms. Allocated memory was 71.3 MB in the beginning and 224.4 MB in the end (delta: 153.1 MB). Free memory was 36.1 MB in the beginning and 201.2 MB in the end (delta: -165.1 MB). Peak memory consumption was 100.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,660 INFO L168 Benchmark]: Witness Printer took 66.99 ms. Allocated memory is still 224.4 MB. Free memory was 201.2 MB in the beginning and 198.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:56:41,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 33.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 345.65 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 30.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.37 ms. Allocated memory is still 56.6 MB. Free memory was 30.8 MB in the beginning and 28.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 458.09 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 28.5 MB in the beginning and 36.6 MB in the end (delta: -8.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23709.40 ms. Allocated memory was 71.3 MB in the beginning and 224.4 MB in the end (delta: 153.1 MB). Free memory was 36.1 MB in the beginning and 201.2 MB in the end (delta: -165.1 MB). Peak memory consumption was 100.5 MB. Max. memory is 16.1 GB. * Witness Printer took 66.99 ms. Allocated memory is still 224.4 MB. Free memory was 201.2 MB in the beginning and 198.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 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 - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 23668.6ms, OverallIterations: 19, TraceHistogramMax: 7, EmptinessCheckTime: 20.4ms, AutomataDifference: 9708.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 323 SDtfs, 845 SDslu, 1549 SDs, 0 SdLazy, 6335 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3631.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 729 GetRequests, 301 SyntacticMatches, 5 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 8809.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=18, InterpolantAutomatonStates: 257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 106.3ms AutomataMinimizationTime, 19 MinimizatonAttempts, 73 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 98.7ms SsaConstructionTime, 476.3ms SatisfiabilityAnalysisTime, 8989.3ms InterpolantComputationTime, 835 NumberOfCodeBlocks, 831 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 806 ConstructedInterpolants, 55 QuantifiedInterpolants, 6693 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1387 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 268/936 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 - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:56:41,696 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...