./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/memsafety-bftpd/bftpd_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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:48:23,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:48:23,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:48:23,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:48:23,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:48:23,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:48:23,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:48:23,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:48:23,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:48:23,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:48:23,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:48:23,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:48:23,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:48:23,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:48:23,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:48:23,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:48:23,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:48:23,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:48:23,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:48:23,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:48:23,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:48:23,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:48:23,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:48:23,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:48:23,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:48:23,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:48:23,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:48:23,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:48:23,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:48:23,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:48:23,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:48:23,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:48:23,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:48:23,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:48:23,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:48:23,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:48:23,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:48:23,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:48:23,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:48:23,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:48:23,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:48:23,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-22 16:48:23,493 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:48:23,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:48:23,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:48:23,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:48:23,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:48:23,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:48:23,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:48:23,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:48:23,495 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:48:23,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:48:23,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:48:23,496 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:48:23,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:48:23,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:48:23,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:48:23,497 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:48:23,497 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:48:23,497 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:48:23,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:48:23,498 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:48:23,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:48:23,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:48:23,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:48:23,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:48:23,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:48:23,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:48:23,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:48:23,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:48:23,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 16:48:23,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 16:48:23,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:48:23,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-22 16:48:23,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:48:23,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:48:23,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:48:23,736 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:48:23,736 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:48:23,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-22 16:48:23,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc0cf412/e5b5b5cf53964110b27fed7120b9605a/FLAG1cd79fa9d [2021-12-22 16:48:24,313 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:48:24,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-22 16:48:24,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc0cf412/e5b5b5cf53964110b27fed7120b9605a/FLAG1cd79fa9d [2021-12-22 16:48:24,818 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fc0cf412/e5b5b5cf53964110b27fed7120b9605a [2021-12-22 16:48:24,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:48:24,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:48:24,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:48:24,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:48:24,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:48:24,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:24" (1/1) ... [2021-12-22 16:48:24,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c54dac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:24, skipping insertion in model container [2021-12-22 16:48:24,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:48:24" (1/1) ... [2021-12-22 16:48:24,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:48:24,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:48:25,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:48:25,232 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:48:25,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:48:25,325 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:48:25,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25 WrapperNode [2021-12-22 16:48:25,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:48:25,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:48:25,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:48:25,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:48:25,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,393 INFO L137 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2021-12-22 16:48:25,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:48:25,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:48:25,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:48:25,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:48:25,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,428 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:48:25,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:48:25,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:48:25,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:48:25,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (1/1) ... [2021-12-22 16:48:25,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:48:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:25,468 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) [2021-12-22 16:48:25,471 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 [2021-12-22 16:48:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 16:48:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-22 16:48:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-22 16:48:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:48:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:48:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:48:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:48:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:48:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 16:48:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:48:25,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:48:25,576 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:48:25,578 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:48:25,819 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:48:25,826 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:48:25,826 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 16:48:25,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:25 BoogieIcfgContainer [2021-12-22 16:48:25,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:48:25,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:48:25,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:48:25,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:48:25,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:48:24" (1/3) ... [2021-12-22 16:48:25,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7bdd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:25, skipping insertion in model container [2021-12-22 16:48:25,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:48:25" (2/3) ... [2021-12-22 16:48:25,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7bdd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:48:25, skipping insertion in model container [2021-12-22 16:48:25,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:48:25" (3/3) ... [2021-12-22 16:48:25,849 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-22 16:48:25,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:48:25,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-22 16:48:25,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:48:25,917 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, mAutomataTypeConcurrency=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 [2021-12-22 16:48:25,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-22 16:48:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:48:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:48:25,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:25,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:48:25,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-22 16:48:25,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914961714] [2021-12-22 16:48:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:25,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:26,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:26,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914961714] [2021-12-22 16:48:26,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914961714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:26,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:26,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:48:26,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070349122] [2021-12-22 16:48:26,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:26,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:26,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:26,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:26,254 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 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 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:26,407 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2021-12-22 16:48:26,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:26,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:48:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:26,417 INFO L225 Difference]: With dead ends: 134 [2021-12-22 16:48:26,427 INFO L226 Difference]: Without dead ends: 128 [2021-12-22 16:48:26,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:26,432 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:26,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-22 16:48:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-12-22 16:48:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.646153846153846) internal successors, (107), 85 states have internal predecessors, (107), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-22 16:48:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2021-12-22 16:48:26,509 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 6 [2021-12-22 16:48:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:26,509 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2021-12-22 16:48:26,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2021-12-22 16:48:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:48:26,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:26,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:48:26,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 16:48:26,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-22 16:48:26,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9828140] [2021-12-22 16:48:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:26,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:26,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:26,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9828140] [2021-12-22 16:48:26,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9828140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:26,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:26,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:26,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175269200] [2021-12-22 16:48:26,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:26,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:26,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:26,645 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:26,783 INFO L93 Difference]: Finished difference Result 222 states and 302 transitions. [2021-12-22 16:48:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:48:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:26,792 INFO L225 Difference]: With dead ends: 222 [2021-12-22 16:48:26,792 INFO L226 Difference]: Without dead ends: 222 [2021-12-22 16:48:26,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:48:26,797 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:26,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 212 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-22 16:48:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2021-12-22 16:48:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 151 states have internal predecessors, (218), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-22 16:48:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2021-12-22 16:48:26,833 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 6 [2021-12-22 16:48:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:26,834 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2021-12-22 16:48:26,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2021-12-22 16:48:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:48:26,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:26,839 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:26,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 16:48:26,840 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-22 16:48:26,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:26,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561772247] [2021-12-22 16:48:26,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:26,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:27,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561772247] [2021-12-22 16:48:27,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561772247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:27,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:27,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:27,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663535590] [2021-12-22 16:48:27,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:27,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:27,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:27,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:27,037 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:27,195 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2021-12-22 16:48:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:48:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:27,198 INFO L225 Difference]: With dead ends: 260 [2021-12-22 16:48:27,199 INFO L226 Difference]: Without dead ends: 260 [2021-12-22 16:48:27,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:48:27,207 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:27,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 189 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-22 16:48:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2021-12-22 16:48:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 154 states have internal predecessors, (221), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-22 16:48:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 266 transitions. [2021-12-22 16:48:27,239 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 266 transitions. Word has length 7 [2021-12-22 16:48:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 266 transitions. [2021-12-22 16:48:27,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 266 transitions. [2021-12-22 16:48:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:48:27,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:27,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:27,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 16:48:27,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:27,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:27,242 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-22 16:48:27,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:27,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323820568] [2021-12-22 16:48:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:27,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:27,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:27,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323820568] [2021-12-22 16:48:27,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323820568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:27,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:27,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:27,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151900924] [2021-12-22 16:48:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:27,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:27,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:27,414 INFO L87 Difference]: Start difference. First operand 172 states and 266 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:27,540 INFO L93 Difference]: Finished difference Result 224 states and 303 transitions. [2021-12-22 16:48:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:27,540 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 16:48:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:27,542 INFO L225 Difference]: With dead ends: 224 [2021-12-22 16:48:27,542 INFO L226 Difference]: Without dead ends: 224 [2021-12-22 16:48:27,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:48:27,548 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:27,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 208 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-22 16:48:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2021-12-22 16:48:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6343283582089552) internal successors, (219), 154 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-22 16:48:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2021-12-22 16:48:27,570 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 8 [2021-12-22 16:48:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2021-12-22 16:48:27,570 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2021-12-22 16:48:27,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:48:27,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:27,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:27,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 16:48:27,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:27,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-22 16:48:27,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:27,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197916493] [2021-12-22 16:48:27,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:27,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:27,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197916493] [2021-12-22 16:48:27,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197916493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:27,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:27,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:27,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123174063] [2021-12-22 16:48:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:27,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:27,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:27,643 INFO L87 Difference]: Start difference. First operand 172 states and 264 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:27,733 INFO L93 Difference]: Finished difference Result 266 states and 366 transitions. [2021-12-22 16:48:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:48:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:27,735 INFO L225 Difference]: With dead ends: 266 [2021-12-22 16:48:27,735 INFO L226 Difference]: Without dead ends: 266 [2021-12-22 16:48:27,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:48:27,736 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:27,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-22 16:48:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2021-12-22 16:48:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.606060606060606) internal successors, (265), 186 states have internal predecessors, (265), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-22 16:48:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 310 transitions. [2021-12-22 16:48:27,748 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 310 transitions. Word has length 9 [2021-12-22 16:48:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:27,748 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 310 transitions. [2021-12-22 16:48:27,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 310 transitions. [2021-12-22 16:48:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:48:27,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:27,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:27,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 16:48:27,749 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:27,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:27,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-22 16:48:27,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:27,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804570055] [2021-12-22 16:48:27,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:27,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:27,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:27,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804570055] [2021-12-22 16:48:27,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804570055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:27,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:27,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:27,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080120546] [2021-12-22 16:48:27,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:27,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:27,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:27,806 INFO L87 Difference]: Start difference. First operand 205 states and 310 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:27,888 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2021-12-22 16:48:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:48:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:27,890 INFO L225 Difference]: With dead ends: 253 [2021-12-22 16:48:27,890 INFO L226 Difference]: Without dead ends: 253 [2021-12-22 16:48:27,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:48:27,892 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:27,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 235 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-22 16:48:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2021-12-22 16:48:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 200 states have internal predecessors, (286), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-12-22 16:48:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 331 transitions. [2021-12-22 16:48:27,909 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 331 transitions. Word has length 10 [2021-12-22 16:48:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:27,909 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 331 transitions. [2021-12-22 16:48:27,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 331 transitions. [2021-12-22 16:48:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:48:27,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:27,911 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:27,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 16:48:27,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:27,913 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-22 16:48:27,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:27,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243550494] [2021-12-22 16:48:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:27,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:28,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:28,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243550494] [2021-12-22 16:48:28,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243550494] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:28,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227965577] [2021-12-22 16:48:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:28,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:28,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:28,023 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) [2021-12-22 16:48:28,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 16:48:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:28,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:48:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:28,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227965577] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:28,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:28,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-12-22 16:48:28,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781631407] [2021-12-22 16:48:28,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:28,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 16:48:28,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:28,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 16:48:28,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:28,523 INFO L87 Difference]: Start difference. First operand 219 states and 331 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:28,770 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2021-12-22 16:48:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-22 16:48:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:28,773 INFO L225 Difference]: With dead ends: 291 [2021-12-22 16:48:28,773 INFO L226 Difference]: Without dead ends: 291 [2021-12-22 16:48:28,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-22 16:48:28,774 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 469 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:28,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-22 16:48:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2021-12-22 16:48:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 183 states have (on average 1.540983606557377) internal successors, (282), 206 states have internal predecessors, (282), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-12-22 16:48:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2021-12-22 16:48:28,783 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 14 [2021-12-22 16:48:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:28,784 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2021-12-22 16:48:28,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:28,784 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2021-12-22 16:48:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 16:48:28,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:28,784 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:28,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:28,999 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 [2021-12-22 16:48:28,999 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2021-12-22 16:48:29,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:29,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777690873] [2021-12-22 16:48:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:29,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:29,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777690873] [2021-12-22 16:48:29,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777690873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9242287] [2021-12-22 16:48:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:29,126 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) [2021-12-22 16:48:29,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 16:48:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:48:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:29,332 INFO L387 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 19 treesize of output 7 [2021-12-22 16:48:29,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9242287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:29,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:29,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-12-22 16:48:29,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045524949] [2021-12-22 16:48:29,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:29,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:29,413 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:29,664 INFO L93 Difference]: Finished difference Result 336 states and 471 transitions. [2021-12-22 16:48:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 16:48:29,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-22 16:48:29,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:29,670 INFO L225 Difference]: With dead ends: 336 [2021-12-22 16:48:29,670 INFO L226 Difference]: Without dead ends: 336 [2021-12-22 16:48:29,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:48:29,671 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 428 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:29,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 317 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-22 16:48:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 239. [2021-12-22 16:48:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 220 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2021-12-22 16:48:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2021-12-22 16:48:29,685 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 15 [2021-12-22 16:48:29,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:29,688 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2021-12-22 16:48:29,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2021-12-22 16:48:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 16:48:29,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:29,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:29,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 16:48:29,915 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,SelfDestructingSolverStorable7 [2021-12-22 16:48:29,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2021-12-22 16:48:29,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541464795] [2021-12-22 16:48:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:29,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:30,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541464795] [2021-12-22 16:48:30,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541464795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:30,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844776248] [2021-12-22 16:48:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:30,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:30,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:30,060 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) [2021-12-22 16:48:30,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 16:48:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:30,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:48:30,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:30,293 INFO L387 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 19 treesize of output 7 [2021-12-22 16:48:30,297 INFO L387 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 19 treesize of output 7 [2021-12-22 16:48:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:30,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:30,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844776248] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:30,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:30,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-12-22 16:48:30,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617503467] [2021-12-22 16:48:30,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:30,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:48:30,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:30,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:48:30,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:48:30,446 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,072 INFO L93 Difference]: Finished difference Result 550 states and 739 transitions. [2021-12-22 16:48:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 16:48:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 16:48:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,076 INFO L225 Difference]: With dead ends: 550 [2021-12-22 16:48:31,076 INFO L226 Difference]: Without dead ends: 550 [2021-12-22 16:48:31,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:48:31,077 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 433 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1026 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 16:48:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-22 16:48:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-12-22 16:48:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 1.5536332179930796) internal successors, (449), 320 states have internal predecessors, (449), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2021-12-22 16:48:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-12-22 16:48:31,091 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 16 [2021-12-22 16:48:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,092 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-12-22 16:48:31,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-12-22 16:48:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:48:31,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:31,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:31,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2021-12-22 16:48:31,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877159129] [2021-12-22 16:48:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:31,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877159129] [2021-12-22 16:48:31,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877159129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:31,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:31,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:31,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176295206] [2021-12-22 16:48:31,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:31,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:31,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,340 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,358 INFO L93 Difference]: Finished difference Result 495 states and 752 transitions. [2021-12-22 16:48:31,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 16:48:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,361 INFO L225 Difference]: With dead ends: 495 [2021-12-22 16:48:31,361 INFO L226 Difference]: Without dead ends: 495 [2021-12-22 16:48:31,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,362 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:31,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-22 16:48:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 479. [2021-12-22 16:48:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 409 states have (on average 1.5574572127139363) internal successors, (637), 445 states have internal predecessors, (637), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-22 16:48:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 747 transitions. [2021-12-22 16:48:31,379 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 747 transitions. Word has length 18 [2021-12-22 16:48:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 747 transitions. [2021-12-22 16:48:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 747 transitions. [2021-12-22 16:48:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 16:48:31,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 16:48:31,381 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:31,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2021-12-22 16:48:31,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274103694] [2021-12-22 16:48:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:31,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274103694] [2021-12-22 16:48:31,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274103694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:31,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:31,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:48:31,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753768038] [2021-12-22 16:48:31,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:31,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:31,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,412 INFO L87 Difference]: Start difference. First operand 479 states and 747 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,417 INFO L93 Difference]: Finished difference Result 441 states and 681 transitions. [2021-12-22 16:48:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-22 16:48:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,421 INFO L225 Difference]: With dead ends: 441 [2021-12-22 16:48:31,421 INFO L226 Difference]: Without dead ends: 441 [2021-12-22 16:48:31,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,422 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:31,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-12-22 16:48:31,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2021-12-22 16:48:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 377 states have (on average 1.5145888594164456) internal successors, (571), 407 states have internal predecessors, (571), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2021-12-22 16:48:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 681 transitions. [2021-12-22 16:48:31,441 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 681 transitions. Word has length 18 [2021-12-22 16:48:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,442 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 681 transitions. [2021-12-22 16:48:31,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 681 transitions. [2021-12-22 16:48:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 16:48:31,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 16:48:31,444 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2021-12-22 16:48:31,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251052692] [2021-12-22 16:48:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:31,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251052692] [2021-12-22 16:48:31,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251052692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:31,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:31,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:48:31,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691870937] [2021-12-22 16:48:31,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:31,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:48:31,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:48:31,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,485 INFO L87 Difference]: Start difference. First operand 441 states and 681 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,514 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2021-12-22 16:48:31,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:48:31,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 16:48:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,518 INFO L225 Difference]: With dead ends: 509 [2021-12-22 16:48:31,518 INFO L226 Difference]: Without dead ends: 509 [2021-12-22 16:48:31,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:48:31,520 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-12-22 16:48:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 491. [2021-12-22 16:48:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 424 states have (on average 1.5047169811320755) internal successors, (638), 455 states have internal predecessors, (638), 20 states have call successors, (20), 15 states have call predecessors, (20), 32 states have return successors, (94), 20 states have call predecessors, (94), 20 states have call successors, (94) [2021-12-22 16:48:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 752 transitions. [2021-12-22 16:48:31,537 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 752 transitions. Word has length 19 [2021-12-22 16:48:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,537 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 752 transitions. [2021-12-22 16:48:31,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:48:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 752 transitions. [2021-12-22 16:48:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-22 16:48:31,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 16:48:31,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2021-12-22 16:48:31,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837622946] [2021-12-22 16:48:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:31,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837622946] [2021-12-22 16:48:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837622946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:31,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:31,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 16:48:31,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166211706] [2021-12-22 16:48:31,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:48:31,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:31,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:48:31,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:31,597 INFO L87 Difference]: Start difference. First operand 491 states and 752 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 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) [2021-12-22 16:48:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:31,651 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2021-12-22 16:48:31,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:48:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 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 25 [2021-12-22 16:48:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:31,653 INFO L225 Difference]: With dead ends: 351 [2021-12-22 16:48:31,653 INFO L226 Difference]: Without dead ends: 351 [2021-12-22 16:48:31,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:48:31,654 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:31,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-22 16:48:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2021-12-22 16:48:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 299 states have (on average 1.4782608695652173) internal successors, (442), 324 states have internal predecessors, (442), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2021-12-22 16:48:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 521 transitions. [2021-12-22 16:48:31,669 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 521 transitions. Word has length 25 [2021-12-22 16:48:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:31,669 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 521 transitions. [2021-12-22 16:48:31,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 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) [2021-12-22 16:48:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 521 transitions. [2021-12-22 16:48:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-22 16:48:31,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:31,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:31,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 16:48:31,672 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2021-12-22 16:48:31,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:31,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871404780] [2021-12-22 16:48:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871404780] [2021-12-22 16:48:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871404780] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:31,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220387136] [2021-12-22 16:48:31,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:31,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:31,828 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) [2021-12-22 16:48:31,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 16:48:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-22 16:48:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:32,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:32,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:32,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220387136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:32,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:32,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-22 16:48:32,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867411501] [2021-12-22 16:48:32,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:32,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:48:32,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:32,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:48:32,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:48:32,453 INFO L87 Difference]: Start difference. First operand 351 states and 521 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:33,132 INFO L93 Difference]: Finished difference Result 531 states and 739 transitions. [2021-12-22 16:48:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:48:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-12-22 16:48:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:33,135 INFO L225 Difference]: With dead ends: 531 [2021-12-22 16:48:33,135 INFO L226 Difference]: Without dead ends: 531 [2021-12-22 16:48:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:48:33,136 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:33,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 376 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-12-22 16:48:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-22 16:48:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 452. [2021-12-22 16:48:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 391 states have (on average 1.4757033248081841) internal successors, (577), 420 states have internal predecessors, (577), 17 states have call successors, (17), 14 states have call predecessors, (17), 29 states have return successors, (72), 17 states have call predecessors, (72), 17 states have call successors, (72) [2021-12-22 16:48:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 666 transitions. [2021-12-22 16:48:33,157 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 666 transitions. Word has length 27 [2021-12-22 16:48:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:33,157 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 666 transitions. [2021-12-22 16:48:33,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 666 transitions. [2021-12-22 16:48:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 16:48:33,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:33,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:33,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:33,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:33,384 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2021-12-22 16:48:33,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769705320] [2021-12-22 16:48:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:33,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:33,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:33,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769705320] [2021-12-22 16:48:33,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769705320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:33,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947392977] [2021-12-22 16:48:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:33,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:33,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:33,487 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) [2021-12-22 16:48:33,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 16:48:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 16:48:33,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:33,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947392977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:33,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2021-12-22 16:48:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663183900] [2021-12-22 16:48:33,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:33,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 16:48:33,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 16:48:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 16:48:33,701 INFO L87 Difference]: Start difference. First operand 452 states and 666 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2021-12-22 16:48:33,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:33,803 INFO L93 Difference]: Finished difference Result 566 states and 816 transitions. [2021-12-22 16:48:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 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 28 [2021-12-22 16:48:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:33,806 INFO L225 Difference]: With dead ends: 566 [2021-12-22 16:48:33,806 INFO L226 Difference]: Without dead ends: 566 [2021-12-22 16:48:33,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-22 16:48:33,807 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 115 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:33,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 164 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:33,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-22 16:48:33,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 473. [2021-12-22 16:48:33,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.4615384615384615) internal successors, (608), 441 states have internal predecessors, (608), 17 states have call successors, (17), 14 states have call predecessors, (17), 25 states have return successors, (68), 17 states have call predecessors, (68), 17 states have call successors, (68) [2021-12-22 16:48:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 693 transitions. [2021-12-22 16:48:33,823 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 693 transitions. Word has length 28 [2021-12-22 16:48:33,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:33,824 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 693 transitions. [2021-12-22 16:48:33,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 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) [2021-12-22 16:48:33,824 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 693 transitions. [2021-12-22 16:48:33,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 16:48:33,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:33,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:33,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:34,039 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,SelfDestructingSolverStorable14 [2021-12-22 16:48:34,039 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2021-12-22 16:48:34,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:34,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685183453] [2021-12-22 16:48:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:34,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:34,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685183453] [2021-12-22 16:48:34,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685183453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244703461] [2021-12-22 16:48:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:34,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:34,376 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) [2021-12-22 16:48:34,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 16:48:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:34,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:48:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:34,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:34,910 INFO L387 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 [2021-12-22 16:48:34,913 INFO L387 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 [2021-12-22 16:48:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:34,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:35,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244703461] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:35,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:35,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-12-22 16:48:35,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226228707] [2021-12-22 16:48:35,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:35,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:48:35,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:48:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:35,083 INFO L87 Difference]: Start difference. First operand 473 states and 693 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:36,527 INFO L93 Difference]: Finished difference Result 871 states and 1165 transitions. [2021-12-22 16:48:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-22 16:48:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-12-22 16:48:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:36,531 INFO L225 Difference]: With dead ends: 871 [2021-12-22 16:48:36,531 INFO L226 Difference]: Without dead ends: 871 [2021-12-22 16:48:36,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=2027, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 16:48:36,533 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 891 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:36,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 297 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 553 Invalid, 0 Unknown, 158 Unchecked, 0.5s Time] [2021-12-22 16:48:36,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-22 16:48:36,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 637. [2021-12-22 16:48:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 570 states have (on average 1.4649122807017543) internal successors, (835), 596 states have internal predecessors, (835), 21 states have call successors, (21), 19 states have call predecessors, (21), 31 states have return successors, (80), 21 states have call predecessors, (80), 21 states have call successors, (80) [2021-12-22 16:48:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 936 transitions. [2021-12-22 16:48:36,550 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 936 transitions. Word has length 29 [2021-12-22 16:48:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:36,551 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 936 transitions. [2021-12-22 16:48:36,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 936 transitions. [2021-12-22 16:48:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:48:36,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:36,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:36,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:36,779 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,SelfDestructingSolverStorable15 [2021-12-22 16:48:36,779 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1182683565, now seen corresponding path program 1 times [2021-12-22 16:48:36,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:36,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468144828] [2021-12-22 16:48:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:36,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:36,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:36,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468144828] [2021-12-22 16:48:36,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468144828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:36,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:48:36,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 16:48:36,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547942413] [2021-12-22 16:48:36,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:48:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:48:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:36,858 INFO L87 Difference]: Start difference. First operand 637 states and 936 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 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) [2021-12-22 16:48:37,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:37,014 INFO L93 Difference]: Finished difference Result 585 states and 816 transitions. [2021-12-22 16:48:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 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 30 [2021-12-22 16:48:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:37,017 INFO L225 Difference]: With dead ends: 585 [2021-12-22 16:48:37,017 INFO L226 Difference]: Without dead ends: 585 [2021-12-22 16:48:37,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:37,018 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:37,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 114 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-12-22 16:48:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 560. [2021-12-22 16:48:37,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 503 states have (on average 1.4532803180914513) internal successors, (731), 531 states have internal predecessors, (731), 15 states have call successors, (15), 13 states have call predecessors, (15), 27 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-22 16:48:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 796 transitions. [2021-12-22 16:48:37,032 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 796 transitions. Word has length 30 [2021-12-22 16:48:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:37,032 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 796 transitions. [2021-12-22 16:48:37,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 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) [2021-12-22 16:48:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 796 transitions. [2021-12-22 16:48:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 16:48:37,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:37,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:37,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 16:48:37,033 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:37,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:37,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2021-12-22 16:48:37,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:37,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165033334] [2021-12-22 16:48:37,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:37,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:37,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:37,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165033334] [2021-12-22 16:48:37,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165033334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:37,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248489484] [2021-12-22 16:48:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:37,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:37,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:37,136 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) [2021-12-22 16:48:37,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 16:48:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:37,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:48:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:37,317 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:48:37,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:48:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:37,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248489484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:37,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:37,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-12-22 16:48:37,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557002435] [2021-12-22 16:48:37,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 16:48:37,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 16:48:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:37,444 INFO L87 Difference]: Start difference. First operand 560 states and 796 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:37,765 INFO L93 Difference]: Finished difference Result 679 states and 905 transitions. [2021-12-22 16:48:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:48:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-22 16:48:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:37,768 INFO L225 Difference]: With dead ends: 679 [2021-12-22 16:48:37,768 INFO L226 Difference]: Without dead ends: 679 [2021-12-22 16:48:37,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:37,768 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 324 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:37,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 179 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-12-22 16:48:37,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-22 16:48:37,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 611. [2021-12-22 16:48:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 552 states have (on average 1.4257246376811594) internal successors, (787), 580 states have internal predecessors, (787), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2021-12-22 16:48:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 852 transitions. [2021-12-22 16:48:37,784 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 852 transitions. Word has length 30 [2021-12-22 16:48:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:37,784 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 852 transitions. [2021-12-22 16:48:37,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:37,784 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 852 transitions. [2021-12-22 16:48:37,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 16:48:37,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:37,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:37,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:38,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:38,003 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:38,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2021-12-22 16:48:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943371168] [2021-12-22 16:48:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:38,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:38,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:38,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943371168] [2021-12-22 16:48:38,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943371168] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394334719] [2021-12-22 16:48:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:38,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:38,126 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) [2021-12-22 16:48:38,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 16:48:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 16:48:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:38,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:38,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394334719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:38,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-12-22 16:48:38,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143437360] [2021-12-22 16:48:38,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:48:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:48:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:48:38,546 INFO L87 Difference]: Start difference. First operand 611 states and 852 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:39,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:39,022 INFO L93 Difference]: Finished difference Result 725 states and 940 transitions. [2021-12-22 16:48:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:48:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-12-22 16:48:39,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:39,025 INFO L225 Difference]: With dead ends: 725 [2021-12-22 16:48:39,025 INFO L226 Difference]: Without dead ends: 725 [2021-12-22 16:48:39,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:48:39,026 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 486 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:39,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 237 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 349 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2021-12-22 16:48:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-12-22 16:48:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 654. [2021-12-22 16:48:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.4131534569983137) internal successors, (838), 623 states have internal predecessors, (838), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2021-12-22 16:48:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 902 transitions. [2021-12-22 16:48:39,046 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 902 transitions. Word has length 31 [2021-12-22 16:48:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:39,047 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 902 transitions. [2021-12-22 16:48:39,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 902 transitions. [2021-12-22 16:48:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 16:48:39,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:39,048 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:39,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:39,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:39,263 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2021-12-22 16:48:39,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285600193] [2021-12-22 16:48:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:39,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:39,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:39,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:39,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285600193] [2021-12-22 16:48:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285600193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:39,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263457445] [2021-12-22 16:48:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:39,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:39,488 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) [2021-12-22 16:48:39,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 16:48:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-22 16:48:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:39,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:39,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263457445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:40,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-22 16:48:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151938725] [2021-12-22 16:48:40,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:48:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:48:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:40,236 INFO L87 Difference]: Start difference. First operand 654 states and 902 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:40,978 INFO L93 Difference]: Finished difference Result 699 states and 917 transitions. [2021-12-22 16:48:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 16:48:40,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-22 16:48:40,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:40,981 INFO L225 Difference]: With dead ends: 699 [2021-12-22 16:48:40,981 INFO L226 Difference]: Without dead ends: 699 [2021-12-22 16:48:40,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2021-12-22 16:48:40,982 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 541 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:40,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 268 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 467 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2021-12-22 16:48:40,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-22 16:48:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 654. [2021-12-22 16:48:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.391231028667791) internal successors, (825), 623 states have internal predecessors, (825), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2021-12-22 16:48:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 889 transitions. [2021-12-22 16:48:41,000 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 889 transitions. Word has length 35 [2021-12-22 16:48:41,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:41,000 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 889 transitions. [2021-12-22 16:48:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 889 transitions. [2021-12-22 16:48:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 16:48:41,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:41,002 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:41,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:41,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:41,215 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2021-12-22 16:48:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:41,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029990819] [2021-12-22 16:48:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:41,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:41,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:41,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:48:41,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029990819] [2021-12-22 16:48:41,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029990819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055278938] [2021-12-22 16:48:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:41,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:41,299 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) [2021-12-22 16:48:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 16:48:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 16:48:41,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:41,605 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:48:41,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-22 16:48:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 16:48:41,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:41,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 20 [2021-12-22 16:48:41,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-12-22 16:48:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 16:48:41,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055278938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:41,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:41,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-12-22 16:48:41,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222615875] [2021-12-22 16:48:41,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:41,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:48:41,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:48:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:48:41,947 INFO L87 Difference]: Start difference. First operand 654 states and 889 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:48:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:42,428 INFO L93 Difference]: Finished difference Result 724 states and 942 transitions. [2021-12-22 16:48:42,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:48:42,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-22 16:48:42,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:42,431 INFO L225 Difference]: With dead ends: 724 [2021-12-22 16:48:42,431 INFO L226 Difference]: Without dead ends: 724 [2021-12-22 16:48:42,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2021-12-22 16:48:42,432 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 412 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:42,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 205 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 406 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-12-22 16:48:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-12-22 16:48:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 664. [2021-12-22 16:48:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.3867768595041323) internal successors, (839), 633 states have internal predecessors, (839), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2021-12-22 16:48:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 899 transitions. [2021-12-22 16:48:42,445 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 899 transitions. Word has length 36 [2021-12-22 16:48:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 899 transitions. [2021-12-22 16:48:42,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:48:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 899 transitions. [2021-12-22 16:48:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 16:48:42,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:42,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:42,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:42,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-22 16:48:42,647 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:42,647 INFO L85 PathProgramCache]: Analyzing trace with hash 45027747, now seen corresponding path program 1 times [2021-12-22 16:48:42,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:42,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992643299] [2021-12-22 16:48:42,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:42,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:42,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:42,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992643299] [2021-12-22 16:48:42,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992643299] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445999508] [2021-12-22 16:48:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:42,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:42,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:42,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:42,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 16:48:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:42,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-22 16:48:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:43,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:43,428 INFO L387 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 [2021-12-22 16:48:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 16:48:43,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:43,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445999508] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:43,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:43,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-12-22 16:48:43,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101346586] [2021-12-22 16:48:43,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:48:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:48:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:48:43,545 INFO L87 Difference]: Start difference. First operand 664 states and 899 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:44,654 INFO L93 Difference]: Finished difference Result 561 states and 698 transitions. [2021-12-22 16:48:44,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 16:48:44,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-12-22 16:48:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:44,657 INFO L225 Difference]: With dead ends: 561 [2021-12-22 16:48:44,657 INFO L226 Difference]: Without dead ends: 561 [2021-12-22 16:48:44,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-12-22 16:48:44,658 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 682 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:44,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 341 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 643 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2021-12-22 16:48:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-22 16:48:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 385. [2021-12-22 16:48:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 346 states have (on average 1.3757225433526012) internal successors, (476), 366 states have internal predecessors, (476), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-22 16:48:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 506 transitions. [2021-12-22 16:48:44,667 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 506 transitions. Word has length 37 [2021-12-22 16:48:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:44,668 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 506 transitions. [2021-12-22 16:48:44,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 16:48:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 506 transitions. [2021-12-22 16:48:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 16:48:44,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:44,668 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:44,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:44,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-22 16:48:44,887 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:44,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2021-12-22 16:48:44,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:44,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141876098] [2021-12-22 16:48:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:44,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:44,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:44,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141876098] [2021-12-22 16:48:44,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141876098] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:44,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777769696] [2021-12-22 16:48:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:44,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:44,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:44,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:44,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 16:48:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:48:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:45,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:45,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777769696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:45,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:45,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-22 16:48:45,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524626659] [2021-12-22 16:48:45,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:45,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:45,186 INFO L87 Difference]: Start difference. First operand 385 states and 506 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-12-22 16:48:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:45,263 INFO L93 Difference]: Finished difference Result 405 states and 521 transitions. [2021-12-22 16:48:45,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:45,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 40 [2021-12-22 16:48:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:45,265 INFO L225 Difference]: With dead ends: 405 [2021-12-22 16:48:45,265 INFO L226 Difference]: Without dead ends: 405 [2021-12-22 16:48:45,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:45,266 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:45,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-22 16:48:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 382. [2021-12-22 16:48:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 345 states have (on average 1.3565217391304347) internal successors, (468), 363 states have internal predecessors, (468), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-22 16:48:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 498 transitions. [2021-12-22 16:48:45,274 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 498 transitions. Word has length 40 [2021-12-22 16:48:45,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:45,274 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 498 transitions. [2021-12-22 16:48:45,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-12-22 16:48:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 498 transitions. [2021-12-22 16:48:45,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 16:48:45,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:45,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:45,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-22 16:48:45,491 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2021-12-22 16:48:45,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844772233] [2021-12-22 16:48:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:45,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:45,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844772233] [2021-12-22 16:48:45,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844772233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:45,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527977302] [2021-12-22 16:48:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:45,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:45,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:45,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 16:48:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:48:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:45,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:45,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527977302] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:45,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:45,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-12-22 16:48:45,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013053064] [2021-12-22 16:48:45,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:45,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:45,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:48:45,795 INFO L87 Difference]: Start difference. First operand 382 states and 498 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-12-22 16:48:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:45,887 INFO L93 Difference]: Finished difference Result 402 states and 512 transitions. [2021-12-22 16:48:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 41 [2021-12-22 16:48:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:45,889 INFO L225 Difference]: With dead ends: 402 [2021-12-22 16:48:45,890 INFO L226 Difference]: Without dead ends: 402 [2021-12-22 16:48:45,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:45,891 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:45,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-22 16:48:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 380. [2021-12-22 16:48:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 345 states have (on average 1.3333333333333333) internal successors, (460), 361 states have internal predecessors, (460), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-22 16:48:45,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 490 transitions. [2021-12-22 16:48:45,899 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 490 transitions. Word has length 41 [2021-12-22 16:48:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:45,899 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 490 transitions. [2021-12-22 16:48:45,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-12-22 16:48:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 490 transitions. [2021-12-22 16:48:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-22 16:48:45,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:45,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:45,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:46,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-22 16:48:46,115 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2021-12-22 16:48:46,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:46,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165314804] [2021-12-22 16:48:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:46,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:46,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:46,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:46,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165314804] [2021-12-22 16:48:46,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165314804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:46,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282908604] [2021-12-22 16:48:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:46,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:46,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:46,184 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 16:48:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 16:48:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:46,283 INFO L387 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 [2021-12-22 16:48:46,341 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:48:46,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:48:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:46,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282908604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:46,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:46,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2021-12-22 16:48:46,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131359264] [2021-12-22 16:48:46,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:46,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 16:48:46,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 16:48:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:46,566 INFO L87 Difference]: Start difference. First operand 380 states and 490 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:46,693 INFO L93 Difference]: Finished difference Result 417 states and 516 transitions. [2021-12-22 16:48:46,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:46,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-12-22 16:48:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:46,695 INFO L225 Difference]: With dead ends: 417 [2021-12-22 16:48:46,695 INFO L226 Difference]: Without dead ends: 417 [2021-12-22 16:48:46,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 16:48:46,696 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:46,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 135 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 158 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2021-12-22 16:48:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-12-22 16:48:46,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 386. [2021-12-22 16:48:46,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 351 states have (on average 1.3162393162393162) internal successors, (462), 367 states have internal predecessors, (462), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-22 16:48:46,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 492 transitions. [2021-12-22 16:48:46,704 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 492 transitions. Word has length 42 [2021-12-22 16:48:46,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:46,704 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 492 transitions. [2021-12-22 16:48:46,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 492 transitions. [2021-12-22 16:48:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 16:48:46,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:46,705 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:46,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:46,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:46,915 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:46,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1366889029, now seen corresponding path program 1 times [2021-12-22 16:48:46,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:46,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430209120] [2021-12-22 16:48:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:46,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:46,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:46,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430209120] [2021-12-22 16:48:46,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430209120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:46,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980370016] [2021-12-22 16:48:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:46,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:46,971 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:46,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-22 16:48:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 16:48:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:47,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:47,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980370016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:47,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:47,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-22 16:48:47,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338492167] [2021-12-22 16:48:47,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:47,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:48:47,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:47,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:48:47,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:47,122 INFO L87 Difference]: Start difference. First operand 386 states and 492 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:48:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:47,153 INFO L93 Difference]: Finished difference Result 450 states and 547 transitions. [2021-12-22 16:48:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:48:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 16:48:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:47,155 INFO L225 Difference]: With dead ends: 450 [2021-12-22 16:48:47,155 INFO L226 Difference]: Without dead ends: 450 [2021-12-22 16:48:47,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 16:48:47,156 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 59 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:47,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 189 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 16:48:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-22 16:48:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 376. [2021-12-22 16:48:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 341 states have (on average 1.284457478005865) internal successors, (438), 357 states have internal predecessors, (438), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2021-12-22 16:48:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 468 transitions. [2021-12-22 16:48:47,164 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 468 transitions. Word has length 45 [2021-12-22 16:48:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 468 transitions. [2021-12-22 16:48:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 16:48:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 468 transitions. [2021-12-22 16:48:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 16:48:47,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:47,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:47,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:47,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-22 16:48:47,382 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:47,382 INFO L85 PathProgramCache]: Analyzing trace with hash -624108164, now seen corresponding path program 1 times [2021-12-22 16:48:47,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:47,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682698884] [2021-12-22 16:48:47,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:47,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:47,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682698884] [2021-12-22 16:48:47,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682698884] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287806635] [2021-12-22 16:48:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:47,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:47,476 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:47,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-22 16:48:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 16:48:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:47,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:47,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287806635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:47,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:47,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2021-12-22 16:48:47,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322636649] [2021-12-22 16:48:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:47,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:47,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:47,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-22 16:48:47,818 INFO L87 Difference]: Start difference. First operand 376 states and 468 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 16:48:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:48,042 INFO L93 Difference]: Finished difference Result 337 states and 403 transitions. [2021-12-22 16:48:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 16:48:48,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2021-12-22 16:48:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:48,044 INFO L225 Difference]: With dead ends: 337 [2021-12-22 16:48:48,044 INFO L226 Difference]: Without dead ends: 337 [2021-12-22 16:48:48,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:48:48,044 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 160 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:48,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 144 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:48:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-12-22 16:48:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 324. [2021-12-22 16:48:48,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.2602739726027397) internal successors, (368), 307 states have internal predecessors, (368), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-12-22 16:48:48,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 393 transitions. [2021-12-22 16:48:48,049 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 393 transitions. Word has length 48 [2021-12-22 16:48:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:48,050 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 393 transitions. [2021-12-22 16:48:48,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 16:48:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 393 transitions. [2021-12-22 16:48:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 16:48:48,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:48,050 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:48,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:48,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-22 16:48:48,251 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2021-12-22 16:48:48,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203634340] [2021-12-22 16:48:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:48,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:48,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 16:48:48,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203634340] [2021-12-22 16:48:48,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203634340] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:48,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097699239] [2021-12-22 16:48:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:48,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:48,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:48,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:48,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-22 16:48:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 16:48:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:48,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:48,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:49,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097699239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:49,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:49,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-12-22 16:48:49,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795017980] [2021-12-22 16:48:49,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:49,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 16:48:49,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 16:48:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-22 16:48:49,037 INFO L87 Difference]: Start difference. First operand 324 states and 393 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:48:49,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:49,421 INFO L93 Difference]: Finished difference Result 352 states and 407 transitions. [2021-12-22 16:48:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:48:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-12-22 16:48:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:49,429 INFO L225 Difference]: With dead ends: 352 [2021-12-22 16:48:49,429 INFO L226 Difference]: Without dead ends: 352 [2021-12-22 16:48:49,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-12-22 16:48:49,430 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 344 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:49,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 216 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2021-12-22 16:48:49,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-22 16:48:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 323. [2021-12-22 16:48:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.25) internal successors, (365), 306 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 388 transitions. [2021-12-22 16:48:49,436 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 388 transitions. Word has length 48 [2021-12-22 16:48:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:49,437 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 388 transitions. [2021-12-22 16:48:49,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:48:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 388 transitions. [2021-12-22 16:48:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 16:48:49,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:49,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:49,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:49,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-22 16:48:49,651 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2021-12-22 16:48:49,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:49,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121466249] [2021-12-22 16:48:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:49,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:49,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 16:48:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121466249] [2021-12-22 16:48:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121466249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:49,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141980205] [2021-12-22 16:48:49,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:49,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:49,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:49,959 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-22 16:48:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-22 16:48:50,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:50,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:50,801 INFO L387 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 [2021-12-22 16:48:50,804 INFO L387 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 [2021-12-22 16:48:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:50,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:50,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141980205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:50,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:50,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2021-12-22 16:48:50,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081489050] [2021-12-22 16:48:50,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:50,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 16:48:50,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 16:48:50,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:50,947 INFO L87 Difference]: Start difference. First operand 323 states and 388 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:48:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:52,007 INFO L93 Difference]: Finished difference Result 393 states and 443 transitions. [2021-12-22 16:48:52,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-22 16:48:52,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2021-12-22 16:48:52,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:52,010 INFO L225 Difference]: With dead ends: 393 [2021-12-22 16:48:52,010 INFO L226 Difference]: Without dead ends: 393 [2021-12-22 16:48:52,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2021-12-22 16:48:52,011 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 514 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:52,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 284 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 575 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2021-12-22 16:48:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-22 16:48:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2021-12-22 16:48:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2397260273972603) internal successors, (362), 306 states have internal predecessors, (362), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 385 transitions. [2021-12-22 16:48:52,017 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 385 transitions. Word has length 50 [2021-12-22 16:48:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:52,017 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 385 transitions. [2021-12-22 16:48:52,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:48:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 385 transitions. [2021-12-22 16:48:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:48:52,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:52,018 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:52,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 16:48:52,231 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2021-12-22 16:48:52,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:52,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521523198] [2021-12-22 16:48:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:52,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:52,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:52,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:52,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:52,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521523198] [2021-12-22 16:48:52,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521523198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:52,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393062788] [2021-12-22 16:48:52,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:52,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:52,372 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:52,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-22 16:48:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:52,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 16:48:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:52,562 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:48:52,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:48:52,676 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:48:52,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:48:52,714 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:48:52,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-22 16:48:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:52,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:52,830 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:48:52,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2021-12-22 16:48:53,057 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-22 16:48:53,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2021-12-22 16:48:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:53,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393062788] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:53,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:53,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2021-12-22 16:48:53,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164968855] [2021-12-22 16:48:53,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:53,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 16:48:53,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 16:48:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-12-22 16:48:53,271 INFO L87 Difference]: Start difference. First operand 323 states and 385 transitions. Second operand has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 16:48:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:53,500 INFO L93 Difference]: Finished difference Result 336 states and 397 transitions. [2021-12-22 16:48:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 16:48:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-12-22 16:48:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:53,502 INFO L225 Difference]: With dead ends: 336 [2021-12-22 16:48:53,502 INFO L226 Difference]: Without dead ends: 336 [2021-12-22 16:48:53,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2021-12-22 16:48:53,504 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 375 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:53,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 60 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 147 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-22 16:48:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-22 16:48:53,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-12-22 16:48:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 305 states have internal predecessors, (360), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:53,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 383 transitions. [2021-12-22 16:48:53,509 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 383 transitions. Word has length 51 [2021-12-22 16:48:53,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:53,510 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 383 transitions. [2021-12-22 16:48:53,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 16:48:53,510 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 383 transitions. [2021-12-22 16:48:53,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:48:53,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:53,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:53,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:53,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:53,731 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2021-12-22 16:48:53,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:53,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121064863] [2021-12-22 16:48:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:53,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:53,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:53,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:53,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121064863] [2021-12-22 16:48:53,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121064863] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577014293] [2021-12-22 16:48:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:53,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:53,844 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:53,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-22 16:48:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 16:48:53,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:54,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-22 16:48:54,107 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:48:54,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:48:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:54,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:48:54,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577014293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:48:54,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 16:48:54,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-12-22 16:48:54,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156517696] [2021-12-22 16:48:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:48:54,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 16:48:54,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 16:48:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:48:54,182 INFO L87 Difference]: Start difference. First operand 322 states and 383 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:54,303 INFO L93 Difference]: Finished difference Result 371 states and 429 transitions. [2021-12-22 16:48:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 16:48:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2021-12-22 16:48:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:54,305 INFO L225 Difference]: With dead ends: 371 [2021-12-22 16:48:54,305 INFO L226 Difference]: Without dead ends: 371 [2021-12-22 16:48:54,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-22 16:48:54,306 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:54,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:48:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-22 16:48:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-12-22 16:48:54,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2226027397260273) internal successors, (357), 305 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 380 transitions. [2021-12-22 16:48:54,325 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 380 transitions. Word has length 51 [2021-12-22 16:48:54,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:54,325 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 380 transitions. [2021-12-22 16:48:54,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 16:48:54,326 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 380 transitions. [2021-12-22 16:48:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:48:54,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:54,327 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:54,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-22 16:48:54,528 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2021-12-22 16:48:54,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:54,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281143769] [2021-12-22 16:48:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:54,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:54,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:54,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281143769] [2021-12-22 16:48:54,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281143769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:54,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176408418] [2021-12-22 16:48:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:54,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:54,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:54,651 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:54,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-22 16:48:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:54,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:48:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:54,832 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:48:54,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:48:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:54,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:55,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176408418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:55,038 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:55,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-22 16:48:55,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371931308] [2021-12-22 16:48:55,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:55,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:55,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:55,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:55,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-12-22 16:48:55,039 INFO L87 Difference]: Start difference. First operand 322 states and 380 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 16:48:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:55,276 INFO L93 Difference]: Finished difference Result 343 states and 396 transitions. [2021-12-22 16:48:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:48:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-22 16:48:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:55,277 INFO L225 Difference]: With dead ends: 343 [2021-12-22 16:48:55,277 INFO L226 Difference]: Without dead ends: 343 [2021-12-22 16:48:55,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-22 16:48:55,278 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:55,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 150 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 212 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2021-12-22 16:48:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-22 16:48:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2021-12-22 16:48:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 305 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2021-12-22 16:48:55,285 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 51 [2021-12-22 16:48:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:55,285 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2021-12-22 16:48:55,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 16:48:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2021-12-22 16:48:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 16:48:55,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:55,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:55,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:55,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:55,514 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:55,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2001887703, now seen corresponding path program 2 times [2021-12-22 16:48:55,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:55,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406878540] [2021-12-22 16:48:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:55,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:55,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:55,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406878540] [2021-12-22 16:48:55,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406878540] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444878043] [2021-12-22 16:48:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:48:55,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:55,612 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:55,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-22 16:48:55,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:48:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:48:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-22 16:48:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:55,858 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:48:55,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:48:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:48:55,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444878043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:55,944 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:55,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-12-22 16:48:55,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628585234] [2021-12-22 16:48:55,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:55,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 16:48:55,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 16:48:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 16:48:55,945 INFO L87 Difference]: Start difference. First operand 322 states and 378 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 16:48:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:56,178 INFO L93 Difference]: Finished difference Result 342 states and 391 transitions. [2021-12-22 16:48:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 16:48:56,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2021-12-22 16:48:56,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:56,180 INFO L225 Difference]: With dead ends: 342 [2021-12-22 16:48:56,180 INFO L226 Difference]: Without dead ends: 342 [2021-12-22 16:48:56,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:56,181 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:56,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 169 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-12-22 16:48:56,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-22 16:48:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 322. [2021-12-22 16:48:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2123287671232876) internal successors, (354), 305 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2021-12-22 16:48:56,186 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 51 [2021-12-22 16:48:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:56,186 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2021-12-22 16:48:56,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 16:48:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2021-12-22 16:48:56,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:48:56,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:56,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:56,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:56,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:56,411 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:56,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2021-12-22 16:48:56,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:56,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645083555] [2021-12-22 16:48:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:56,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:56,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:56,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:48:56,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:56,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645083555] [2021-12-22 16:48:56,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645083555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:56,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758434198] [2021-12-22 16:48:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:56,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:56,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:56,908 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:56,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-22 16:48:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:56,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 16:48:56,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:57,182 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:48:57,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:48:57,403 INFO L353 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-12-22 16:48:57,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-12-22 16:48:57,471 INFO L353 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-22 16:48:57,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-12-22 16:48:57,617 INFO L387 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 [2021-12-22 16:48:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:57,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:57,726 INFO L353 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-22 16:48:57,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 81 [2021-12-22 16:48:58,005 INFO L353 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-12-22 16:48:58,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2021-12-22 16:48:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:48:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758434198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 16:48:58,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 16:48:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2021-12-22 16:48:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891814260] [2021-12-22 16:48:58,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:58,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-22 16:48:58,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-22 16:48:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-12-22 16:48:58,296 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 16:48:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:48:58,968 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2021-12-22 16:48:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 16:48:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-12-22 16:48:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:48:58,969 INFO L225 Difference]: With dead ends: 373 [2021-12-22 16:48:58,970 INFO L226 Difference]: Without dead ends: 373 [2021-12-22 16:48:58,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=2551, Unknown=0, NotChecked=0, Total=3080 [2021-12-22 16:48:58,971 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 618 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 16:48:58,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 246 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 838 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2021-12-22 16:48:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-22 16:48:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 322. [2021-12-22 16:48:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2054794520547945) internal successors, (352), 305 states have internal predecessors, (352), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:48:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 375 transitions. [2021-12-22 16:48:58,976 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 375 transitions. Word has length 52 [2021-12-22 16:48:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:48:58,977 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 375 transitions. [2021-12-22 16:48:58,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 16:48:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 375 transitions. [2021-12-22 16:48:58,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:48:58,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:48:58,978 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:48:59,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-22 16:48:59,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:59,178 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:48:59,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:48:59,178 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2021-12-22 16:48:59,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:48:59,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603276912] [2021-12-22 16:48:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:59,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:48:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:48:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:48:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 16:48:59,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:48:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603276912] [2021-12-22 16:48:59,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603276912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:59,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818594293] [2021-12-22 16:48:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:48:59,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:48:59,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:48:59,323 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:48:59,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-22 16:48:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:48:59,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-22 16:48:59,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:48:59,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:48:59,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:48:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 16:48:59,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:48:59,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818594293] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:48:59,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:48:59,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-12-22 16:48:59,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015232105] [2021-12-22 16:48:59,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:48:59,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-22 16:48:59,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:48:59,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-22 16:48:59,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:48:59,846 INFO L87 Difference]: Start difference. First operand 322 states and 375 transitions. Second operand has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:49:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:00,241 INFO L93 Difference]: Finished difference Result 353 states and 395 transitions. [2021-12-22 16:49:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 16:49:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2021-12-22 16:49:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:00,243 INFO L225 Difference]: With dead ends: 353 [2021-12-22 16:49:00,243 INFO L226 Difference]: Without dead ends: 353 [2021-12-22 16:49:00,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-12-22 16:49:00,244 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 404 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:00,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 244 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 315 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2021-12-22 16:49:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-22 16:49:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 322. [2021-12-22 16:49:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 305 states have internal predecessors, (346), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:49:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 369 transitions. [2021-12-22 16:49:00,249 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 369 transitions. Word has length 52 [2021-12-22 16:49:00,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:00,249 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 369 transitions. [2021-12-22 16:49:00,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:49:00,249 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 369 transitions. [2021-12-22 16:49:00,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 16:49:00,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:00,250 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:00,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-22 16:49:00,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:49:00,463 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2021-12-22 16:49:00,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:49:00,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499571382] [2021-12-22 16:49:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:00,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:49:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:49:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:49:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 16:49:00,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:49:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499571382] [2021-12-22 16:49:00,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499571382] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:00,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820953150] [2021-12-22 16:49:00,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:49:00,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:49:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:49:00,596 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:49:00,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-22 16:49:00,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:49:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:49:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:49:00,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:00,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:49:00,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:49:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:49:01,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:49:01,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820953150] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:01,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:49:01,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-12-22 16:49:01,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839056156] [2021-12-22 16:49:01,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:49:01,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 16:49:01,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:49:01,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 16:49:01,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-22 16:49:01,154 INFO L87 Difference]: Start difference. First operand 322 states and 369 transitions. Second operand has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:49:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:01,485 INFO L93 Difference]: Finished difference Result 349 states and 389 transitions. [2021-12-22 16:49:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 16:49:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-12-22 16:49:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:01,486 INFO L225 Difference]: With dead ends: 349 [2021-12-22 16:49:01,486 INFO L226 Difference]: Without dead ends: 349 [2021-12-22 16:49:01,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2021-12-22 16:49:01,487 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 250 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:01,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 235 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 294 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2021-12-22 16:49:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-22 16:49:01,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 322. [2021-12-22 16:49:01,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.178082191780822) internal successors, (344), 305 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:49:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2021-12-22 16:49:01,492 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 52 [2021-12-22 16:49:01,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:01,492 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2021-12-22 16:49:01,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:49:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2021-12-22 16:49:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 16:49:01,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:01,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:01,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-22 16:49:01,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-22 16:49:01,700 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2021-12-22 16:49:01,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:49:01,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627466924] [2021-12-22 16:49:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:01,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:49:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:01,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:49:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:01,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:49:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:49:01,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:49:01,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627466924] [2021-12-22 16:49:01,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627466924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:01,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135012065] [2021-12-22 16:49:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:01,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:49:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:49:01,912 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:49:01,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-22 16:49:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-22 16:49:02,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:02,103 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-22 16:49:02,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-12-22 16:49:02,262 INFO L353 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-22 16:49:02,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2021-12-22 16:49:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:02,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:49:02,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135012065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:02,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:49:02,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-12-22 16:49:02,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105883559] [2021-12-22 16:49:02,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:49:02,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 16:49:02,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:49:02,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 16:49:02,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-12-22 16:49:02,648 INFO L87 Difference]: Start difference. First operand 322 states and 367 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:49:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:03,206 INFO L93 Difference]: Finished difference Result 350 states and 391 transitions. [2021-12-22 16:49:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:49:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-12-22 16:49:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:03,208 INFO L225 Difference]: With dead ends: 350 [2021-12-22 16:49:03,208 INFO L226 Difference]: Without dead ends: 350 [2021-12-22 16:49:03,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 16:49:03,209 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:03,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 354 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 322 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2021-12-22 16:49:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-22 16:49:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 321. [2021-12-22 16:49:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 304 states have internal predecessors, (342), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:49:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 365 transitions. [2021-12-22 16:49:03,213 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 365 transitions. Word has length 54 [2021-12-22 16:49:03,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:03,213 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 365 transitions. [2021-12-22 16:49:03,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 16:49:03,214 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 365 transitions. [2021-12-22 16:49:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 16:49:03,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:03,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:03,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:03,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-22 16:49:03,415 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2021-12-22 16:49:03,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:49:03,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934245239] [2021-12-22 16:49:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:03,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:49:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:03,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:49:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:03,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:49:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 16:49:03,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:49:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934245239] [2021-12-22 16:49:03,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934245239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241113034] [2021-12-22 16:49:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:03,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:49:03,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:49:03,604 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:49:03,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-22 16:49:03,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-22 16:49:03,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:04,149 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:49:04,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-22 16:49:04,166 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:49:04,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-22 16:49:04,178 INFO L387 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 7 treesize of output 3 [2021-12-22 16:49:04,180 INFO L387 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 7 treesize of output 3 [2021-12-22 16:49:04,384 INFO L387 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 [2021-12-22 16:49:04,459 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-22 16:49:04,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-22 16:49:04,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-22 16:49:04,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-22 16:49:04,661 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-22 16:49:04,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-22 16:49:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:04,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:49:04,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-22 16:49:04,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241113034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:04,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:49:04,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-12-22 16:49:04,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314301868] [2021-12-22 16:49:04,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:49:04,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-22 16:49:04,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:49:04,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-22 16:49:04,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-12-22 16:49:04,886 INFO L87 Difference]: Start difference. First operand 321 states and 365 transitions. Second operand has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:49:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:06,175 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2021-12-22 16:49:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 16:49:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-12-22 16:49:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:06,177 INFO L225 Difference]: With dead ends: 348 [2021-12-22 16:49:06,177 INFO L226 Difference]: Without dead ends: 348 [2021-12-22 16:49:06,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=514, Invalid=2908, Unknown=0, NotChecked=0, Total=3422 [2021-12-22 16:49:06,178 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 354 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 633 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:06,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 580 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 610 Invalid, 0 Unknown, 633 Unchecked, 0.3s Time] [2021-12-22 16:49:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-12-22 16:49:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 321. [2021-12-22 16:49:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.167808219178082) internal successors, (341), 304 states have internal predecessors, (341), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:49:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 364 transitions. [2021-12-22 16:49:06,185 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 364 transitions. Word has length 55 [2021-12-22 16:49:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:06,185 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 364 transitions. [2021-12-22 16:49:06,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-22 16:49:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 364 transitions. [2021-12-22 16:49:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 16:49:06,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:06,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:06,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:06,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-22 16:49:06,398 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2021-12-22 16:49:06,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:49:06,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429271776] [2021-12-22 16:49:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:06,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:49:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:06,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:49:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:49:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-22 16:49:06,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 16:49:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429271776] [2021-12-22 16:49:06,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429271776] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591413542] [2021-12-22 16:49:06,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 16:49:06,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 16:49:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:49:06,574 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 16:49:06,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-22 16:49:06,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 16:49:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 16:49:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-22 16:49:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-22 16:49:07,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-22 16:49:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 16:49:07,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 16:49:07,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591413542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 16:49:07,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-22 16:49:07,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-12-22 16:49:07,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640509924] [2021-12-22 16:49:07,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-22 16:49:07,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 16:49:07,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 16:49:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 16:49:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-22 16:49:07,364 INFO L87 Difference]: Start difference. First operand 321 states and 364 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:49:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:07,845 INFO L93 Difference]: Finished difference Result 342 states and 380 transitions. [2021-12-22 16:49:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 16:49:07,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-12-22 16:49:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:07,846 INFO L225 Difference]: With dead ends: 342 [2021-12-22 16:49:07,846 INFO L226 Difference]: Without dead ends: 342 [2021-12-22 16:49:07,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-12-22 16:49:07,848 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:07,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 314 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2021-12-22 16:49:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-22 16:49:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 321. [2021-12-22 16:49:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1575342465753424) internal successors, (338), 304 states have internal predecessors, (338), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-12-22 16:49:07,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 361 transitions. [2021-12-22 16:49:07,852 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 361 transitions. Word has length 56 [2021-12-22 16:49:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:07,853 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 361 transitions. [2021-12-22 16:49:07,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 16:49:07,853 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 361 transitions. [2021-12-22 16:49:07,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 16:49:07,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:07,854 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:07,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-22 16:49:08,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-22 16:49:08,067 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:08,068 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2021-12-22 16:49:08,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 16:49:08,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432209802] [2021-12-22 16:49:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:08,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 16:49:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 16:49:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 16:49:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:08,278 ERROR L253 erpolLogProxyWrapper]: Interpolant 12 not inductive [2021-12-22 16:49:08,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 16:49:08,293 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-22 16:49:08,299 INFO L158 Benchmark]: Toolchain (without parser) took 43477.49ms. Allocated memory was 92.3MB in the beginning and 134.2MB in the end (delta: 41.9MB). Free memory was 57.1MB in the beginning and 83.1MB in the end (delta: -26.0MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-12-22 16:49:08,300 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:49:08,301 INFO L158 Benchmark]: CACSL2BoogieTranslator took 500.81ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 56.9MB in the beginning and 76.3MB in the end (delta: -19.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-22 16:49:08,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.38ms. Allocated memory is still 111.1MB. Free memory was 76.3MB in the beginning and 74.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:49:08,301 INFO L158 Benchmark]: Boogie Preprocessor took 36.95ms. Allocated memory is still 111.1MB. Free memory was 73.6MB in the beginning and 72.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 16:49:08,301 INFO L158 Benchmark]: RCFGBuilder took 396.28ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 58.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-22 16:49:08,301 INFO L158 Benchmark]: TraceAbstraction took 42469.35ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 83.1MB in the end (delta: -25.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 16:49:08,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory was 48.3MB in the beginning and 48.2MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 500.81ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 56.9MB in the beginning and 76.3MB in the end (delta: -19.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.38ms. Allocated memory is still 111.1MB. Free memory was 76.3MB in the beginning and 74.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.95ms. Allocated memory is still 111.1MB. Free memory was 73.6MB in the beginning and 72.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 396.28ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 58.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 42469.35ms. Allocated memory was 111.1MB in the beginning and 134.2MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 83.1MB in the end (delta: -25.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-22 16:49:08,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/memsafety-bftpd/bftpd_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 16:49:10,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 16:49:10,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 16:49:10,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 16:49:10,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 16:49:10,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 16:49:10,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 16:49:10,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 16:49:10,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 16:49:10,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 16:49:10,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 16:49:10,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 16:49:10,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 16:49:10,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 16:49:10,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 16:49:10,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 16:49:10,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 16:49:10,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 16:49:10,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 16:49:10,366 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 16:49:10,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 16:49:10,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 16:49:10,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 16:49:10,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 16:49:10,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 16:49:10,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 16:49:10,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 16:49:10,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 16:49:10,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 16:49:10,379 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 16:49:10,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 16:49:10,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 16:49:10,381 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 16:49:10,382 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 16:49:10,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 16:49:10,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 16:49:10,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 16:49:10,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 16:49:10,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 16:49:10,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 16:49:10,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 16:49:10,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-22 16:49:10,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 16:49:10,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 16:49:10,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 16:49:10,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 16:49:10,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 16:49:10,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 16:49:10,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 16:49:10,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 16:49:10,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-22 16:49:10,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 16:49:10,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 16:49:10,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 16:49:10,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 16:49:10,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 16:49:10,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:49:10,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 16:49:10,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 16:49:10,424 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-22 16:49:10,424 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-22 16:49:10,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 16:49:10,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-22 16:49:10,425 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2021-12-22 16:49:10,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 16:49:10,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 16:49:10,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 16:49:10,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 16:49:10,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 16:49:10,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-22 16:49:10,855 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59902efc5/0a8ad4923f5f4294ba9a7c66d274c5c6/FLAG5f50218e5 [2021-12-22 16:49:11,314 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 16:49:11,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2021-12-22 16:49:11,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59902efc5/0a8ad4923f5f4294ba9a7c66d274c5c6/FLAG5f50218e5 [2021-12-22 16:49:11,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59902efc5/0a8ad4923f5f4294ba9a7c66d274c5c6 [2021-12-22 16:49:11,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 16:49:11,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 16:49:11,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 16:49:11,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 16:49:11,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 16:49:11,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:11" (1/1) ... [2021-12-22 16:49:11,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff1d704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:11, skipping insertion in model container [2021-12-22 16:49:11,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:11" (1/1) ... [2021-12-22 16:49:11,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 16:49:11,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 16:49:12,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:49:12,025 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 16:49:12,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 16:49:12,092 INFO L208 MainTranslator]: Completed translation [2021-12-22 16:49:12,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12 WrapperNode [2021-12-22 16:49:12,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 16:49:12,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 16:49:12,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 16:49:12,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 16:49:12,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,136 INFO L137 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2021-12-22 16:49:12,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 16:49:12,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 16:49:12,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 16:49:12,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 16:49:12,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,164 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 16:49:12,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 16:49:12,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 16:49:12,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 16:49:12,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (1/1) ... [2021-12-22 16:49:12,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 16:49:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 16:49:12,201 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) [2021-12-22 16:49:12,224 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 [2021-12-22 16:49:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-22 16:49:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-12-22 16:49:12,242 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-12-22 16:49:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 16:49:12,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 16:49:12,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 16:49:12,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 16:49:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 16:49:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-22 16:49:12,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 16:49:12,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 16:49:12,397 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 16:49:12,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 16:49:12,695 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 16:49:12,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 16:49:12,701 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 16:49:12,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:12 BoogieIcfgContainer [2021-12-22 16:49:12,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 16:49:12,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 16:49:12,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 16:49:12,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 16:49:12,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:11" (1/3) ... [2021-12-22 16:49:12,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675120d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:12, skipping insertion in model container [2021-12-22 16:49:12,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:12" (2/3) ... [2021-12-22 16:49:12,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675120d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:12, skipping insertion in model container [2021-12-22 16:49:12,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:12" (3/3) ... [2021-12-22 16:49:12,722 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2021-12-22 16:49:12,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 16:49:12,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-12-22 16:49:12,772 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 16:49:12,789 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, mAutomataTypeConcurrency=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 [2021-12-22 16:49:12,789 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-12-22 16:49:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 16:49:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:49:12,829 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:12,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:49:12,830 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2021-12-22 16:49:12,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32721619] [2021-12-22 16:49:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:12,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:12,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:12,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-22 16:49:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:12,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 16:49:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:13,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:13,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:13,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32721619] [2021-12-22 16:49:13,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32721619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:13,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:13,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-12-22 16:49:13,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051600171] [2021-12-22 16:49:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:13,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 16:49:13,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 16:49:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:49:13,122 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:13,288 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-12-22 16:49:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 16:49:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:49:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:13,304 INFO L225 Difference]: With dead ends: 121 [2021-12-22 16:49:13,308 INFO L226 Difference]: Without dead ends: 117 [2021-12-22 16:49:13,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 16:49:13,313 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:13,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:49:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-22 16:49:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2021-12-22 16:49:13,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 16:49:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2021-12-22 16:49:13,375 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2021-12-22 16:49:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:13,376 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2021-12-22 16:49:13,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2021-12-22 16:49:13,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-22 16:49:13,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:13,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-22 16:49:13,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:13,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:13,588 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:13,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2021-12-22 16:49:13,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:13,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816681911] [2021-12-22 16:49:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:13,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:13,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-22 16:49:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:13,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 16:49:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:13,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:13,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816681911] [2021-12-22 16:49:13,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816681911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:13,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:13,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 16:49:13,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086020941] [2021-12-22 16:49:13,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:13,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 16:49:13,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 16:49:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:49:13,741 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:13,949 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2021-12-22 16:49:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 16:49:13,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-22 16:49:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:13,952 INFO L225 Difference]: With dead ends: 214 [2021-12-22 16:49:13,953 INFO L226 Difference]: Without dead ends: 214 [2021-12-22 16:49:13,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 16:49:13,954 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:13,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 158 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:49:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-22 16:49:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-12-22 16:49:13,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-22 16:49:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2021-12-22 16:49:13,984 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2021-12-22 16:49:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:13,985 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2021-12-22 16:49:13,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2021-12-22 16:49:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 16:49:13,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:13,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:14,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:14,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:14,195 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:14,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:14,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2021-12-22 16:49:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101307535] [2021-12-22 16:49:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:14,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:14,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:14,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-22 16:49:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:14,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:49:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:14,407 INFO L387 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 [2021-12-22 16:49:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:14,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:14,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:14,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101307535] [2021-12-22 16:49:14,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101307535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:14,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:14,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:49:14,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766173519] [2021-12-22 16:49:14,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:14,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:49:14,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:14,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:49:14,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:49:14,421 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:14,695 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2021-12-22 16:49:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:49:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-22 16:49:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:14,698 INFO L225 Difference]: With dead ends: 247 [2021-12-22 16:49:14,698 INFO L226 Difference]: Without dead ends: 247 [2021-12-22 16:49:14,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:49:14,700 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:14,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:49:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-22 16:49:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2021-12-22 16:49:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-22 16:49:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2021-12-22 16:49:14,723 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2021-12-22 16:49:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:14,723 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2021-12-22 16:49:14,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2021-12-22 16:49:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 16:49:14,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:14,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:14,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:14,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:14,944 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2021-12-22 16:49:14,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418743231] [2021-12-22 16:49:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:14,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:14,947 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:14,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-22 16:49:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 16:49:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:15,176 INFO L387 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 [2021-12-22 16:49:15,184 INFO L387 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 [2021-12-22 16:49:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:15,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:15,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:15,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418743231] [2021-12-22 16:49:15,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418743231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:15,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:15,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:49:15,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875909231] [2021-12-22 16:49:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:15,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:49:15,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:49:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:49:15,219 INFO L87 Difference]: Start difference. First operand 159 states and 246 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:15,448 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2021-12-22 16:49:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:49:15,449 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-22 16:49:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:15,450 INFO L225 Difference]: With dead ends: 216 [2021-12-22 16:49:15,451 INFO L226 Difference]: Without dead ends: 216 [2021-12-22 16:49:15,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:49:15,452 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:15,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:49:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-22 16:49:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2021-12-22 16:49:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-22 16:49:15,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2021-12-22 16:49:15,465 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2021-12-22 16:49:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2021-12-22 16:49:15,465 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, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2021-12-22 16:49:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 16:49:15,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:15,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:15,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:15,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:15,675 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:15,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2021-12-22 16:49:15,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:15,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71016077] [2021-12-22 16:49:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:15,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:15,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:15,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:15,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-22 16:49:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 16:49:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:15,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:15,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:15,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71016077] [2021-12-22 16:49:15,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71016077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:15,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:15,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:49:15,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308538429] [2021-12-22 16:49:15,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:15,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:49:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:49:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:49:15,788 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:15,946 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2021-12-22 16:49:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:49:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 16:49:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:15,948 INFO L225 Difference]: With dead ends: 253 [2021-12-22 16:49:15,948 INFO L226 Difference]: Without dead ends: 253 [2021-12-22 16:49:15,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:49:15,949 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:15,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 16:49:15,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-22 16:49:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2021-12-22 16:49:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-22 16:49:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2021-12-22 16:49:15,961 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2021-12-22 16:49:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2021-12-22 16:49:15,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2021-12-22 16:49:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 16:49:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:15,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:15,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:16,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:16,170 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2021-12-22 16:49:16,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:16,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511677345] [2021-12-22 16:49:16,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:16,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:16,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:16,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-22 16:49:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:49:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:16,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 16:49:16,311 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-22 16:49:16,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511677345] [2021-12-22 16:49:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511677345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 16:49:16,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 16:49:16,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 16:49:16,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870883781] [2021-12-22 16:49:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 16:49:16,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 16:49:16,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-22 16:49:16,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 16:49:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 16:49:16,314 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 16:49:16,515 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2021-12-22 16:49:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 16:49:16,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 16:49:16,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 16:49:16,517 INFO L225 Difference]: With dead ends: 242 [2021-12-22 16:49:16,517 INFO L226 Difference]: Without dead ends: 242 [2021-12-22 16:49:16,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 16:49:16,518 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 16:49:16,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 16:49:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-22 16:49:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-12-22 16:49:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-12-22 16:49:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2021-12-22 16:49:16,528 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2021-12-22 16:49:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 16:49:16,528 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2021-12-22 16:49:16,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 16:49:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2021-12-22 16:49:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-22 16:49:16,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 16:49:16,529 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 16:49:16,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-22 16:49:16,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-22 16:49:16,741 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2021-12-22 16:49:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 16:49:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2021-12-22 16:49:16,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-22 16:49:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089575955] [2021-12-22 16:49:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 16:49:16,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-22 16:49:16,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-22 16:49:16,743 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-22 16:49:16,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-22 16:49:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 16:49:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 16:49:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 16:49:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 16:49:16,969 INFO L328 TraceCheckSpWp]: Computing backward predicates...