./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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_3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:06:56,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:06:56,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:06:56,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:06:56,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:06:56,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:06:56,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:06:56,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:06:56,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:06:56,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:06:56,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:06:56,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:06:56,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:06:56,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:06:56,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:06:56,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:06:56,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:06:56,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:06:56,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:06:56,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:06:56,450 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:06:56,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:06:56,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:06:56,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:06:56,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:06:56,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:06:56,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:06:56,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:06:56,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:06:56,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:06:56,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:06:56,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:06:56,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:06:56,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:06:56,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:06:56,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:06:56,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:06:56,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:06:56,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:06:56,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:06:56,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:06:56,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:06:56,471 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 07:06:56,505 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:06:56,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:06:56,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:06:56,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:06:56,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:06:56,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:06:56,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:06:56,512 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:06:56,512 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:06:56,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:06:56,514 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:06:56,514 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:06:56,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:06:56,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:06:56,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:06:56,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:06:56,515 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:06:56,515 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:06:56,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:06:56,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:06:56,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:06:56,517 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:06:56,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:06:56,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:06:56,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:06:56,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:06:56,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:06:56,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:06:56,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 07:06:56,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 07:06:56,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2022-07-14 07:06:56,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:06:56,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:06:56,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:06:56,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:06:56,796 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:06:56,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-07-14 07:06:56,867 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1ce86/7121cb6b999145a7bea4971f666dd232/FLAGd0b006f46 [2022-07-14 07:06:57,386 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:06:57,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-07-14 07:06:57,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1ce86/7121cb6b999145a7bea4971f666dd232/FLAGd0b006f46 [2022-07-14 07:06:57,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aacf1ce86/7121cb6b999145a7bea4971f666dd232 [2022-07-14 07:06:57,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:06:57,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:06:57,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:06:57,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:06:57,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:06:57,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:06:57" (1/1) ... [2022-07-14 07:06:57,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f87b3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:57, skipping insertion in model container [2022-07-14 07:06:57,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:06:57" (1/1) ... [2022-07-14 07:06:57,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:06:57,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:06:58,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:06:58,134 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 07:06:58,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:06:58,199 INFO L208 MainTranslator]: Completed translation [2022-07-14 07:06:58,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58 WrapperNode [2022-07-14 07:06:58,200 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:06:58,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 07:06:58,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 07:06:58,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 07:06:58,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,272 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-07-14 07:06:58,276 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 07:06:58,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 07:06:58,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 07:06:58,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 07:06:58,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 07:06:58,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 07:06:58,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 07:06:58,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 07:06:58,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (1/1) ... [2022-07-14 07:06:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:06:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:06:58,348 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) [2022-07-14 07:06:58,356 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 [2022-07-14 07:06:58,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-14 07:06:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 07:06:58,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 07:06:58,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 07:06:58,483 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 07:06:58,484 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 07:06:58,681 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 07:06:58,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 07:06:58,687 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-14 07:06:58,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:06:58 BoogieIcfgContainer [2022-07-14 07:06:58,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 07:06:58,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 07:06:58,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 07:06:58,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 07:06:58,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 07:06:57" (1/3) ... [2022-07-14 07:06:58,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46839bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:06:58, skipping insertion in model container [2022-07-14 07:06:58,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:06:58" (2/3) ... [2022-07-14 07:06:58,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46839bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:06:58, skipping insertion in model container [2022-07-14 07:06:58,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:06:58" (3/3) ... [2022-07-14 07:06:58,705 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2022-07-14 07:06:58,719 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 07:06:58,719 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-14 07:06:58,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 07:06:58,779 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65111eac, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@63f69baf [2022-07-14 07:06:58,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-14 07:06:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-07-14 07:06:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:06:58,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:06:58,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:06:58,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:06:58,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:06:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-14 07:06:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:06:58,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462149292] [2022-07-14 07:06:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:06:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:06:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:06:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:06:59,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:06:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462149292] [2022-07-14 07:06:59,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462149292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:06:59,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:06:59,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:06:59,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841119511] [2022-07-14 07:06:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:06:59,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:06:59,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:06:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:06:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:06:59,184 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-07-14 07:06:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:06:59,380 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-07-14 07:06:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:06:59,383 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 [2022-07-14 07:06:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:06:59,392 INFO L225 Difference]: With dead ends: 120 [2022-07-14 07:06:59,393 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 07:06:59,403 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:06:59,407 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:06:59,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 106 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:06:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 07:06:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2022-07-14 07:06:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 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) [2022-07-14 07:06:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2022-07-14 07:06:59,468 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 6 [2022-07-14 07:06:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:06:59,469 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2022-07-14 07:06:59,469 INFO L496 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) [2022-07-14 07:06:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2022-07-14 07:06:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:06:59,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:06:59,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:06:59,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 07:06:59,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:06:59,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:06:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-14 07:06:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:06:59,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563076007] [2022-07-14 07:06:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:06:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:06:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:06:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:06:59,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:06:59,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563076007] [2022-07-14 07:06:59,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563076007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:06:59,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:06:59,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:06:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619748693] [2022-07-14 07:06:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:06:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:06:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:06:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:06:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:06:59,615 INFO L87 Difference]: Start difference. First operand 87 states and 117 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) [2022-07-14 07:06:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:06:59,774 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2022-07-14 07:06:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:06:59,775 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 [2022-07-14 07:06:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:06:59,777 INFO L225 Difference]: With dead ends: 213 [2022-07-14 07:06:59,777 INFO L226 Difference]: Without dead ends: 213 [2022-07-14 07:06:59,778 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:06:59,779 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 228 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:06:59,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:06:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-14 07:06:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 160. [2022-07-14 07:06:59,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 143 states have internal predecessors, (210), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-14 07:06:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 246 transitions. [2022-07-14 07:06:59,802 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 246 transitions. Word has length 6 [2022-07-14 07:06:59,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:06:59,803 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 246 transitions. [2022-07-14 07:06:59,803 INFO L496 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) [2022-07-14 07:06:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 246 transitions. [2022-07-14 07:06:59,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 07:06:59,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:06:59,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:06:59,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 07:06:59,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:06:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:06:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-14 07:06:59,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:06:59,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743750507] [2022-07-14 07:06:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:06:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:06:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:06:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:06:59,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:06:59,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743750507] [2022-07-14 07:06:59,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743750507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:06:59,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:06:59,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:06:59,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076877356] [2022-07-14 07:06:59,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:06:59,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:06:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:06:59,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:06:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:06:59,951 INFO L87 Difference]: Start difference. First operand 160 states and 246 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) [2022-07-14 07:07:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:00,101 INFO L93 Difference]: Finished difference Result 239 states and 342 transitions. [2022-07-14 07:07:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:00,101 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 [2022-07-14 07:07:00,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:00,104 INFO L225 Difference]: With dead ends: 239 [2022-07-14 07:07:00,105 INFO L226 Difference]: Without dead ends: 239 [2022-07-14 07:07:00,105 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:00,106 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:00,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 163 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:00,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-14 07:07:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2022-07-14 07:07:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6511627906976745) internal successors, (213), 146 states have internal predecessors, (213), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-14 07:07:00,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 249 transitions. [2022-07-14 07:07:00,125 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 249 transitions. Word has length 7 [2022-07-14 07:07:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:00,125 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 249 transitions. [2022-07-14 07:07:00,125 INFO L496 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) [2022-07-14 07:07:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 249 transitions. [2022-07-14 07:07:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 07:07:00,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:00,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 07:07:00,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-14 07:07:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741973077] [2022-07-14 07:07:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:00,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:00,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:00,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741973077] [2022-07-14 07:07:00,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741973077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:00,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:00,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:00,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341809701] [2022-07-14 07:07:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:00,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:00,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:00,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:00,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:00,293 INFO L87 Difference]: Start difference. First operand 163 states and 249 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) [2022-07-14 07:07:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:00,426 INFO L93 Difference]: Finished difference Result 215 states and 286 transitions. [2022-07-14 07:07:00,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:00,427 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 [2022-07-14 07:07:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:00,431 INFO L225 Difference]: With dead ends: 215 [2022-07-14 07:07:00,431 INFO L226 Difference]: Without dead ends: 215 [2022-07-14 07:07:00,432 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:00,441 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 139 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 190 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 [2022-07-14 07:07:00,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 190 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:00,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-14 07:07:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 163. [2022-07-14 07:07:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6356589147286822) internal successors, (211), 146 states have internal predecessors, (211), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-14 07:07:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 247 transitions. [2022-07-14 07:07:00,456 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 247 transitions. Word has length 8 [2022-07-14 07:07:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:00,457 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 247 transitions. [2022-07-14 07:07:00,457 INFO L496 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) [2022-07-14 07:07:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 247 transitions. [2022-07-14 07:07:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 07:07:00,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:00,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:00,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 07:07:00,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:00,459 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-14 07:07:00,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:00,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530092762] [2022-07-14 07:07:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:00,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:00,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530092762] [2022-07-14 07:07:00,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530092762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:00,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:00,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:00,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679747011] [2022-07-14 07:07:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:00,519 INFO L87 Difference]: Start difference. First operand 163 states and 247 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) [2022-07-14 07:07:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:00,613 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2022-07-14 07:07:00,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:00,614 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 [2022-07-14 07:07:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:00,616 INFO L225 Difference]: With dead ends: 245 [2022-07-14 07:07:00,616 INFO L226 Difference]: Without dead ends: 245 [2022-07-14 07:07:00,616 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:00,617 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:00,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 187 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-14 07:07:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2022-07-14 07:07:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.60625) internal successors, (257), 178 states have internal predecessors, (257), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-14 07:07:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 293 transitions. [2022-07-14 07:07:00,630 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 293 transitions. Word has length 9 [2022-07-14 07:07:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:00,630 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 293 transitions. [2022-07-14 07:07:00,631 INFO L496 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) [2022-07-14 07:07:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 293 transitions. [2022-07-14 07:07:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 07:07:00,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:00,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 07:07:00,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-14 07:07:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646695869] [2022-07-14 07:07:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:00,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646695869] [2022-07-14 07:07:00,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646695869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:00,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:00,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:00,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780698372] [2022-07-14 07:07:00,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:00,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:00,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:00,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:00,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:00,686 INFO L87 Difference]: Start difference. First operand 196 states and 293 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) [2022-07-14 07:07:00,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:00,773 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2022-07-14 07:07:00,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:00,774 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 [2022-07-14 07:07:00,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:00,776 INFO L225 Difference]: With dead ends: 244 [2022-07-14 07:07:00,776 INFO L226 Difference]: Without dead ends: 244 [2022-07-14 07:07:00,776 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:00,777 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 139 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 211 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 [2022-07-14 07:07:00,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 211 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-14 07:07:00,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2022-07-14 07:07:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 173 states have (on average 1.606936416184971) internal successors, (278), 192 states have internal predecessors, (278), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-14 07:07:00,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 314 transitions. [2022-07-14 07:07:00,793 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 314 transitions. Word has length 10 [2022-07-14 07:07:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:00,793 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 314 transitions. [2022-07-14 07:07:00,793 INFO L496 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) [2022-07-14 07:07:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 314 transitions. [2022-07-14 07:07:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 07:07:00,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:00,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:00,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 07:07:00,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:00,796 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-14 07:07:00,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:00,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737993373] [2022-07-14 07:07:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:00,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:00,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:00,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737993373] [2022-07-14 07:07:00,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737993373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:00,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515629487] [2022-07-14 07:07:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:00,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:00,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:00,958 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) [2022-07-14 07:07:00,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 07:07:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:01,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:07:01,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515629487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:01,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:01,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-07-14 07:07:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937843019] [2022-07-14 07:07:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 07:07:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 07:07:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-14 07:07:01,443 INFO L87 Difference]: Start difference. First operand 210 states and 314 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) [2022-07-14 07:07:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:01,714 INFO L93 Difference]: Finished difference Result 281 states and 376 transitions. [2022-07-14 07:07:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:07:01,714 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 [2022-07-14 07:07:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:01,717 INFO L225 Difference]: With dead ends: 281 [2022-07-14 07:07:01,718 INFO L226 Difference]: Without dead ends: 281 [2022-07-14 07:07:01,718 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:01,720 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 329 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:01,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 534 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-07-14 07:07:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 215. [2022-07-14 07:07:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 197 states have internal predecessors, (273), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-14 07:07:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 310 transitions. [2022-07-14 07:07:01,729 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 310 transitions. Word has length 14 [2022-07-14 07:07:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:01,730 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 310 transitions. [2022-07-14 07:07:01,730 INFO L496 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) [2022-07-14 07:07:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 310 transitions. [2022-07-14 07:07:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 07:07:01,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:01,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:01,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:01,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:01,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-14 07:07:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033239631] [2022-07-14 07:07:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:01,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:02,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033239631] [2022-07-14 07:07:02,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033239631] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:02,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653805730] [2022-07-14 07:07:02,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:02,078 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) [2022-07-14 07:07:02,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 07:07:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 07:07:02,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:02,272 INFO L390 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 [2022-07-14 07:07:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:02,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:02,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653805730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:02,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:02,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-14 07:07:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924391601] [2022-07-14 07:07:02,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:02,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 07:07:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 07:07:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-14 07:07:02,344 INFO L87 Difference]: Start difference. First operand 215 states and 310 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) [2022-07-14 07:07:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:02,619 INFO L93 Difference]: Finished difference Result 312 states and 433 transitions. [2022-07-14 07:07:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 07:07:02,620 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 [2022-07-14 07:07:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:02,624 INFO L225 Difference]: With dead ends: 312 [2022-07-14 07:07:02,624 INFO L226 Difference]: Without dead ends: 312 [2022-07-14 07:07:02,624 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:02,625 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 236 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:02,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-14 07:07:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 227. [2022-07-14 07:07:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 187 states have (on average 1.5294117647058822) internal successors, (286), 209 states have internal predecessors, (286), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2022-07-14 07:07:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 327 transitions. [2022-07-14 07:07:02,640 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 327 transitions. Word has length 15 [2022-07-14 07:07:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:02,640 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 327 transitions. [2022-07-14 07:07:02,640 INFO L496 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) [2022-07-14 07:07:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 327 transitions. [2022-07-14 07:07:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 07:07:02,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:02,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:02,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-14 07:07:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-14 07:07:02,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:02,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-14 07:07:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:02,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843314607] [2022-07-14 07:07:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:02,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:02,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843314607] [2022-07-14 07:07:02,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843314607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:02,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891182325] [2022-07-14 07:07:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:02,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:02,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:02,985 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) [2022-07-14 07:07:03,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 07:07:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 07:07:03,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:03,197 INFO L390 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 [2022-07-14 07:07:03,207 INFO L390 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 [2022-07-14 07:07:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:03,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891182325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:03,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:03,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-07-14 07:07:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579883153] [2022-07-14 07:07:03,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:03,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 07:07:03,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 07:07:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-14 07:07:03,347 INFO L87 Difference]: Start difference. First operand 227 states and 327 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) [2022-07-14 07:07:04,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,010 INFO L93 Difference]: Finished difference Result 491 states and 639 transitions. [2022-07-14 07:07:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 07:07:04,011 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 [2022-07-14 07:07:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,014 INFO L225 Difference]: With dead ends: 491 [2022-07-14 07:07:04,014 INFO L226 Difference]: Without dead ends: 491 [2022-07-14 07:07:04,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-07-14 07:07:04,015 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 593 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:04,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 883 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 07:07:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-07-14 07:07:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 298. [2022-07-14 07:07:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 254 states have (on average 1.5511811023622046) internal successors, (394), 278 states have internal predecessors, (394), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-14 07:07:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 437 transitions. [2022-07-14 07:07:04,034 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 437 transitions. Word has length 16 [2022-07-14 07:07:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,034 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 437 transitions. [2022-07-14 07:07:04,035 INFO L496 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) [2022-07-14 07:07:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 437 transitions. [2022-07-14 07:07:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:07:04,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:04,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:04,255 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2022-07-14 07:07:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706612561] [2022-07-14 07:07:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706612561] [2022-07-14 07:07:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706612561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:04,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:04,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 07:07:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000124068] [2022-07-14 07:07:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:04,304 INFO L87 Difference]: Start difference. First operand 298 states and 437 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) [2022-07-14 07:07:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,320 INFO L93 Difference]: Finished difference Result 440 states and 649 transitions. [2022-07-14 07:07:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:04,321 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 [2022-07-14 07:07:04,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,323 INFO L225 Difference]: With dead ends: 440 [2022-07-14 07:07:04,323 INFO L226 Difference]: Without dead ends: 440 [2022-07-14 07:07:04,323 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:04,324 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:04,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-14 07:07:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 423. [2022-07-14 07:07:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 367 states have (on average 1.555858310626703) internal successors, (571), 396 states have internal predecessors, (571), 15 states have call successors, (15), 11 states have call predecessors, (15), 23 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2022-07-14 07:07:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 641 transitions. [2022-07-14 07:07:04,338 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 641 transitions. Word has length 18 [2022-07-14 07:07:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,339 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 641 transitions. [2022-07-14 07:07:04,339 INFO L496 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) [2022-07-14 07:07:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 641 transitions. [2022-07-14 07:07:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:07:04,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:04,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 07:07:04,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2022-07-14 07:07:04,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953124676] [2022-07-14 07:07:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953124676] [2022-07-14 07:07:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953124676] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:04,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:04,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253776344] [2022-07-14 07:07:04,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:04,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:04,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:04,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:04,365 INFO L87 Difference]: Start difference. First operand 423 states and 641 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) [2022-07-14 07:07:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,370 INFO L93 Difference]: Finished difference Result 387 states and 577 transitions. [2022-07-14 07:07:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:04,371 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 [2022-07-14 07:07:04,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,373 INFO L225 Difference]: With dead ends: 387 [2022-07-14 07:07:04,373 INFO L226 Difference]: Without dead ends: 387 [2022-07-14 07:07:04,374 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:04,374 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 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 [2022-07-14 07:07:04,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-07-14 07:07:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-07-14 07:07:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 336 states have (on average 1.505952380952381) internal successors, (506), 360 states have internal predecessors, (506), 15 states have call successors, (15), 11 states have call predecessors, (15), 24 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2022-07-14 07:07:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 577 transitions. [2022-07-14 07:07:04,387 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 577 transitions. Word has length 18 [2022-07-14 07:07:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,387 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 577 transitions. [2022-07-14 07:07:04,387 INFO L496 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) [2022-07-14 07:07:04,388 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 577 transitions. [2022-07-14 07:07:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 07:07:04,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:04,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 07:07:04,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2022-07-14 07:07:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442179064] [2022-07-14 07:07:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442179064] [2022-07-14 07:07:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442179064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:04,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:04,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 07:07:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047227041] [2022-07-14 07:07:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:04,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:04,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:04,419 INFO L87 Difference]: Start difference. First operand 387 states and 577 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) [2022-07-14 07:07:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,450 INFO L93 Difference]: Finished difference Result 452 states and 656 transitions. [2022-07-14 07:07:04,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:04,450 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 [2022-07-14 07:07:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,454 INFO L225 Difference]: With dead ends: 452 [2022-07-14 07:07:04,455 INFO L226 Difference]: Without dead ends: 452 [2022-07-14 07:07:04,455 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:04,456 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:04,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-14 07:07:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 431. [2022-07-14 07:07:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 378 states have (on average 1.5052910052910053) internal successors, (569), 402 states have internal predecessors, (569), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (57), 16 states have call predecessors, (57), 16 states have call successors, (57) [2022-07-14 07:07:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 642 transitions. [2022-07-14 07:07:04,471 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 642 transitions. Word has length 19 [2022-07-14 07:07:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,471 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 642 transitions. [2022-07-14 07:07:04,471 INFO L496 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) [2022-07-14 07:07:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 642 transitions. [2022-07-14 07:07:04,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:07:04,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,477 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 07:07:04,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2022-07-14 07:07:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455001436] [2022-07-14 07:07:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455001436] [2022-07-14 07:07:04,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455001436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:04,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:04,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:07:04,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726748825] [2022-07-14 07:07:04,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:04,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:04,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:04,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:04,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:04,537 INFO L87 Difference]: Start difference. First operand 431 states and 642 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) [2022-07-14 07:07:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,593 INFO L93 Difference]: Finished difference Result 300 states and 427 transitions. [2022-07-14 07:07:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:04,594 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 [2022-07-14 07:07:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,595 INFO L225 Difference]: With dead ends: 300 [2022-07-14 07:07:04,596 INFO L226 Difference]: Without dead ends: 300 [2022-07-14 07:07:04,596 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:04,597 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:04,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-14 07:07:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2022-07-14 07:07:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 257 states have (on average 1.4747081712062258) internal successors, (379), 275 states have internal predecessors, (379), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-14 07:07:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 422 transitions. [2022-07-14 07:07:04,605 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 422 transitions. Word has length 25 [2022-07-14 07:07:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,605 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 422 transitions. [2022-07-14 07:07:04,605 INFO L496 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) [2022-07-14 07:07:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 422 transitions. [2022-07-14 07:07:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 07:07:04,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,606 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 07:07:04,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1518533648, now seen corresponding path program 1 times [2022-07-14 07:07:04,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713371988] [2022-07-14 07:07:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713371988] [2022-07-14 07:07:04,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713371988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:04,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:04,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:07:04,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583856497] [2022-07-14 07:07:04,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:04,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:07:04,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:07:04,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:07:04,694 INFO L87 Difference]: Start difference. First operand 295 states and 422 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-07-14 07:07:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:04,827 INFO L93 Difference]: Finished difference Result 314 states and 436 transitions. [2022-07-14 07:07:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 07:07:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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 27 [2022-07-14 07:07:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:04,829 INFO L225 Difference]: With dead ends: 314 [2022-07-14 07:07:04,829 INFO L226 Difference]: Without dead ends: 314 [2022-07-14 07:07:04,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:04,830 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:04,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 111 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-14 07:07:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 295. [2022-07-14 07:07:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 257 states have (on average 1.4630350194552528) internal successors, (376), 275 states have internal predecessors, (376), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2022-07-14 07:07:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 419 transitions. [2022-07-14 07:07:04,838 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 419 transitions. Word has length 27 [2022-07-14 07:07:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:04,839 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 419 transitions. [2022-07-14 07:07:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-07-14 07:07:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 419 transitions. [2022-07-14 07:07:04,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 07:07:04,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:04,840 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:04,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 07:07:04,840 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:04,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2022-07-14 07:07:04,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:04,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670168900] [2022-07-14 07:07:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:04,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670168900] [2022-07-14 07:07:04,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670168900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:04,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319449437] [2022-07-14 07:07:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:04,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:04,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:04,999 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) [2022-07-14 07:07:05,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 07:07:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:05,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 07:07:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:05,328 INFO L390 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 [2022-07-14 07:07:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:05,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:05,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319449437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:05,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:05,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-14 07:07:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340547782] [2022-07-14 07:07:05,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:05,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 07:07:05,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 07:07:05,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:07:05,519 INFO L87 Difference]: Start difference. First operand 295 states and 419 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) [2022-07-14 07:07:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:06,231 INFO L93 Difference]: Finished difference Result 425 states and 560 transitions. [2022-07-14 07:07:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 07:07:06,232 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 [2022-07-14 07:07:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:06,234 INFO L225 Difference]: With dead ends: 425 [2022-07-14 07:07:06,234 INFO L226 Difference]: Without dead ends: 425 [2022-07-14 07:07:06,235 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:06,237 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 514 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:06,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 179 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 294 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-07-14 07:07:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-07-14 07:07:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 346. [2022-07-14 07:07:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 305 states have (on average 1.4491803278688524) internal successors, (442), 324 states have internal predecessors, (442), 12 states have call successors, (12), 9 states have call predecessors, (12), 17 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-14 07:07:06,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 487 transitions. [2022-07-14 07:07:06,250 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 487 transitions. Word has length 27 [2022-07-14 07:07:06,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:06,251 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 487 transitions. [2022-07-14 07:07:06,252 INFO L496 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) [2022-07-14 07:07:06,252 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 487 transitions. [2022-07-14 07:07:06,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 07:07:06,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:06,254 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:06,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-14 07:07:06,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2022-07-14 07:07:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319962854] [2022-07-14 07:07:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:06,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319962854] [2022-07-14 07:07:06,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319962854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732715787] [2022-07-14 07:07:06,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:06,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:06,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:06,569 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) [2022-07-14 07:07:06,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 07:07:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:07:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:06,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:06,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732715787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:06,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:06,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-07-14 07:07:06,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200244231] [2022-07-14 07:07:06,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:06,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:07:06,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:07:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-14 07:07:06,768 INFO L87 Difference]: Start difference. First operand 346 states and 487 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) [2022-07-14 07:07:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:06,860 INFO L93 Difference]: Finished difference Result 424 states and 569 transitions. [2022-07-14 07:07:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:07:06,861 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 [2022-07-14 07:07:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:06,862 INFO L225 Difference]: With dead ends: 424 [2022-07-14 07:07:06,862 INFO L226 Difference]: Without dead ends: 424 [2022-07-14 07:07:06,862 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:06,863 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 100 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:06,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 143 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:06,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-07-14 07:07:06,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 365. [2022-07-14 07:07:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 324 states have (on average 1.4259259259259258) internal successors, (462), 343 states have internal predecessors, (462), 12 states have call successors, (12), 9 states have call predecessors, (12), 17 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-14 07:07:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 507 transitions. [2022-07-14 07:07:06,874 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 507 transitions. Word has length 28 [2022-07-14 07:07:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:06,874 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 507 transitions. [2022-07-14 07:07:06,874 INFO L496 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) [2022-07-14 07:07:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 507 transitions. [2022-07-14 07:07:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 07:07:06,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:06,875 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:06,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:07,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-14 07:07:07,101 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:07,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash -719880979, now seen corresponding path program 1 times [2022-07-14 07:07:07,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656371497] [2022-07-14 07:07:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:07,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:07,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656371497] [2022-07-14 07:07:07,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656371497] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:07,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587331865] [2022-07-14 07:07:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:07,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:07,430 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) [2022-07-14 07:07:07,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 07:07:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 07:07:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:07,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:07,826 INFO L390 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 [2022-07-14 07:07:07,911 INFO L390 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 [2022-07-14 07:07:07,914 INFO L390 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 [2022-07-14 07:07:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:07,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587331865] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:08,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:08,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-14 07:07:08,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669162272] [2022-07-14 07:07:08,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 07:07:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 07:07:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-14 07:07:08,075 INFO L87 Difference]: Start difference. First operand 365 states and 507 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) [2022-07-14 07:07:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:08,886 INFO L93 Difference]: Finished difference Result 457 states and 582 transitions. [2022-07-14 07:07:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 07:07:08,887 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 [2022-07-14 07:07:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:08,888 INFO L225 Difference]: With dead ends: 457 [2022-07-14 07:07:08,889 INFO L226 Difference]: Without dead ends: 457 [2022-07-14 07:07:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=1112, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 07:07:08,890 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 562 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:08,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 192 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 389 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-07-14 07:07:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-14 07:07:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 366. [2022-07-14 07:07:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 325 states have (on average 1.4184615384615384) internal successors, (461), 344 states have internal predecessors, (461), 12 states have call successors, (12), 9 states have call predecessors, (12), 17 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-14 07:07:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 506 transitions. [2022-07-14 07:07:08,899 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 506 transitions. Word has length 29 [2022-07-14 07:07:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:08,900 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 506 transitions. [2022-07-14 07:07:08,900 INFO L496 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) [2022-07-14 07:07:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 506 transitions. [2022-07-14 07:07:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 07:07:08,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:08,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:08,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:09,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-14 07:07:09,116 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:09,116 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-07-14 07:07:09,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:09,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754181066] [2022-07-14 07:07:09,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:09,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:09,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754181066] [2022-07-14 07:07:09,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754181066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:09,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871155123] [2022-07-14 07:07:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:09,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:09,178 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) [2022-07-14 07:07:09,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 07:07:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 07:07:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:09,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:09,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871155123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:09,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:09,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-14 07:07:09,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840582432] [2022-07-14 07:07:09,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:09,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:07:09,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:09,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:07:09,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:09,379 INFO L87 Difference]: Start difference. First operand 366 states and 506 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:09,636 INFO L93 Difference]: Finished difference Result 492 states and 628 transitions. [2022-07-14 07:07:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:07:09,636 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-14 07:07:09,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:09,638 INFO L225 Difference]: With dead ends: 492 [2022-07-14 07:07:09,638 INFO L226 Difference]: Without dead ends: 492 [2022-07-14 07:07:09,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:07:09,639 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:09,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 148 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-14 07:07:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 439. [2022-07-14 07:07:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 396 states have (on average 1.3813131313131313) internal successors, (547), 415 states have internal predecessors, (547), 12 states have call successors, (12), 11 states have call predecessors, (12), 19 states have return successors, (31), 12 states have call predecessors, (31), 12 states have call successors, (31) [2022-07-14 07:07:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 590 transitions. [2022-07-14 07:07:09,650 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 590 transitions. Word has length 30 [2022-07-14 07:07:09,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:09,650 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 590 transitions. [2022-07-14 07:07:09,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 07:07:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 590 transitions. [2022-07-14 07:07:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 07:07:09,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:09,651 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:09,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:09,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:09,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-07-14 07:07:09,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025217256] [2022-07-14 07:07:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:09,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:09,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025217256] [2022-07-14 07:07:09,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025217256] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:09,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683505057] [2022-07-14 07:07:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:09,936 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) [2022-07-14 07:07:09,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 07:07:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:10,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 07:07:10,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:10,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:07:10,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683505057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:10,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:10,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-14 07:07:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558420818] [2022-07-14 07:07:10,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 07:07:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 07:07:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:07:10,234 INFO L87 Difference]: Start difference. First operand 439 states and 590 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 07:07:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:10,680 INFO L93 Difference]: Finished difference Result 523 states and 653 transitions. [2022-07-14 07:07:10,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 07:07:10,681 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-07-14 07:07:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:10,683 INFO L225 Difference]: With dead ends: 523 [2022-07-14 07:07:10,683 INFO L226 Difference]: Without dead ends: 523 [2022-07-14 07:07:10,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2022-07-14 07:07:10,684 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 420 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:10,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 220 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-14 07:07:10,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 490. [2022-07-14 07:07:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 444 states have (on average 1.3445945945945945) internal successors, (597), 465 states have internal predecessors, (597), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-14 07:07:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 638 transitions. [2022-07-14 07:07:10,698 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 638 transitions. Word has length 31 [2022-07-14 07:07:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:10,698 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 638 transitions. [2022-07-14 07:07:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 07:07:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 638 transitions. [2022-07-14 07:07:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 07:07:10,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:10,700 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:10,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:10,919 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2022-07-14 07:07:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:10,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737825546] [2022-07-14 07:07:10,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:10,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:11,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:11,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737825546] [2022-07-14 07:07:11,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737825546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363436913] [2022-07-14 07:07:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:11,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:11,101 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) [2022-07-14 07:07:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 07:07:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 07:07:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:11,363 INFO L390 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 [2022-07-14 07:07:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:11,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363436913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:11,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:11,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-14 07:07:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790803088] [2022-07-14 07:07:11,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:11,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 07:07:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 07:07:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-14 07:07:11,640 INFO L87 Difference]: Start difference. First operand 490 states and 638 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) [2022-07-14 07:07:12,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:12,417 INFO L93 Difference]: Finished difference Result 525 states and 650 transitions. [2022-07-14 07:07:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:07:12,418 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 [2022-07-14 07:07:12,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:12,420 INFO L225 Difference]: With dead ends: 525 [2022-07-14 07:07:12,420 INFO L226 Difference]: Without dead ends: 525 [2022-07-14 07:07:12,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 07:07:12,422 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 605 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:12,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 184 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 421 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-07-14 07:07:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-14 07:07:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 490. [2022-07-14 07:07:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 444 states have (on average 1.3153153153153154) internal successors, (584), 465 states have internal predecessors, (584), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-07-14 07:07:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 625 transitions. [2022-07-14 07:07:12,446 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 625 transitions. Word has length 35 [2022-07-14 07:07:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:12,446 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 625 transitions. [2022-07-14 07:07:12,446 INFO L496 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) [2022-07-14 07:07:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 625 transitions. [2022-07-14 07:07:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 07:07:12,447 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:12,447 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:12,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:12,673 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2022-07-14 07:07:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:12,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234475799] [2022-07-14 07:07:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:12,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:12,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:12,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:12,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234475799] [2022-07-14 07:07:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234475799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334495316] [2022-07-14 07:07:12,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:12,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:12,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:12,793 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) [2022-07-14 07:07:12,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 07:07:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:12,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 07:07:12,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:13,020 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 07:07:13,021 INFO L390 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 [2022-07-14 07:07:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 07:07:13,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:13,105 INFO L390 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 [2022-07-14 07:07:13,251 INFO L390 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 [2022-07-14 07:07:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 07:07:13,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334495316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:13,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:13,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-07-14 07:07:13,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827057403] [2022-07-14 07:07:13,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:13,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 07:07:13,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 07:07:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-07-14 07:07:13,275 INFO L87 Difference]: Start difference. First operand 490 states and 625 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) [2022-07-14 07:07:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:13,651 INFO L93 Difference]: Finished difference Result 530 states and 653 transitions. [2022-07-14 07:07:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 07:07:13,651 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 [2022-07-14 07:07:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:13,653 INFO L225 Difference]: With dead ends: 530 [2022-07-14 07:07:13,654 INFO L226 Difference]: Without dead ends: 530 [2022-07-14 07:07:13,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2022-07-14 07:07:13,655 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 599 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:13,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 102 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 207 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-07-14 07:07:13,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-07-14 07:07:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 490. [2022-07-14 07:07:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 445 states have (on average 1.3146067415730338) internal successors, (585), 465 states have internal predecessors, (585), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2022-07-14 07:07:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 624 transitions. [2022-07-14 07:07:13,666 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 624 transitions. Word has length 36 [2022-07-14 07:07:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:13,666 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 624 transitions. [2022-07-14 07:07:13,666 INFO L496 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) [2022-07-14 07:07:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 624 transitions. [2022-07-14 07:07:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 07:07:13,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:13,667 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:13,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:13,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-14 07:07:13,891 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1341383453, now seen corresponding path program 1 times [2022-07-14 07:07:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:13,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049957987] [2022-07-14 07:07:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:14,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:14,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049957987] [2022-07-14 07:07:14,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049957987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:14,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900027090] [2022-07-14 07:07:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:14,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:14,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:14,154 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) [2022-07-14 07:07:14,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 07:07:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:14,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 07:07:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:14,471 INFO L390 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 [2022-07-14 07:07:14,524 INFO L390 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 [2022-07-14 07:07:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:14,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900027090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:14,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:14,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-07-14 07:07:14,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921547795] [2022-07-14 07:07:14,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:14,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 07:07:14,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 07:07:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-14 07:07:14,637 INFO L87 Difference]: Start difference. First operand 490 states and 624 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) [2022-07-14 07:07:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:15,749 INFO L93 Difference]: Finished difference Result 405 states and 478 transitions. [2022-07-14 07:07:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 07:07:15,756 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 [2022-07-14 07:07:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:15,757 INFO L225 Difference]: With dead ends: 405 [2022-07-14 07:07:15,757 INFO L226 Difference]: Without dead ends: 405 [2022-07-14 07:07:15,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 07:07:15,759 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 606 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:15,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 254 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 558 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-07-14 07:07:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-14 07:07:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 337. [2022-07-14 07:07:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 304 states have (on average 1.305921052631579) internal successors, (397), 320 states have internal predecessors, (397), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-14 07:07:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 419 transitions. [2022-07-14 07:07:15,769 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 419 transitions. Word has length 37 [2022-07-14 07:07:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:15,769 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 419 transitions. [2022-07-14 07:07:15,769 INFO L496 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) [2022-07-14 07:07:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 419 transitions. [2022-07-14 07:07:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 07:07:15,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:15,770 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:15,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-14 07:07:15,995 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:15,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1132276347, now seen corresponding path program 1 times [2022-07-14 07:07:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393333610] [2022-07-14 07:07:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:15,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:16,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393333610] [2022-07-14 07:07:16,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393333610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75098180] [2022-07-14 07:07:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:16,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:16,050 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) [2022-07-14 07:07:16,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 07:07:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 07:07:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:16,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:16,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75098180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:16,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:16,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-14 07:07:16,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340645942] [2022-07-14 07:07:16,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:16,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:16,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:16,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-14 07:07:16,161 INFO L87 Difference]: Start difference. First operand 337 states and 419 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) [2022-07-14 07:07:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:16,187 INFO L93 Difference]: Finished difference Result 368 states and 436 transitions. [2022-07-14 07:07:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:16,187 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 [2022-07-14 07:07:16,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:16,189 INFO L225 Difference]: With dead ends: 368 [2022-07-14 07:07:16,189 INFO L226 Difference]: Without dead ends: 368 [2022-07-14 07:07:16,189 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:16,190 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 54 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:16,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 130 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:16,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-14 07:07:16,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 325. [2022-07-14 07:07:16,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 292 states have (on average 1.2705479452054795) internal successors, (371), 308 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-14 07:07:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 393 transitions. [2022-07-14 07:07:16,198 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 393 transitions. Word has length 45 [2022-07-14 07:07:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:16,198 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 393 transitions. [2022-07-14 07:07:16,198 INFO L496 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) [2022-07-14 07:07:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 393 transitions. [2022-07-14 07:07:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:07:16,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:16,199 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:16,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-14 07:07:16,420 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2022-07-14 07:07:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53140140] [2022-07-14 07:07:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-14 07:07:16,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53140140] [2022-07-14 07:07:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53140140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199244641] [2022-07-14 07:07:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:16,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:16,575 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) [2022-07-14 07:07:16,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 07:07:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:16,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 07:07:16,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:17,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:17,012 INFO L390 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 [2022-07-14 07:07:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:07:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199244641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:17,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:17,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-14 07:07:17,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399911099] [2022-07-14 07:07:17,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 07:07:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 07:07:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:07:17,169 INFO L87 Difference]: Start difference. First operand 325 states and 393 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:17,603 INFO L93 Difference]: Finished difference Result 379 states and 431 transitions. [2022-07-14 07:07:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 07:07:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-14 07:07:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:17,605 INFO L225 Difference]: With dead ends: 379 [2022-07-14 07:07:17,605 INFO L226 Difference]: Without dead ends: 379 [2022-07-14 07:07:17,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2022-07-14 07:07:17,606 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 514 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:17,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 165 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 216 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-07-14 07:07:17,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-14 07:07:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 329. [2022-07-14 07:07:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.2626262626262625) internal successors, (375), 312 states have internal predecessors, (375), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 395 transitions. [2022-07-14 07:07:17,614 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 395 transitions. Word has length 48 [2022-07-14 07:07:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:17,614 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 395 transitions. [2022-07-14 07:07:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 395 transitions. [2022-07-14 07:07:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 07:07:17,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:17,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:17,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-14 07:07:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-14 07:07:17,831 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:17,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2022-07-14 07:07:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:17,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222434830] [2022-07-14 07:07:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:17,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:17,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:17,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222434830] [2022-07-14 07:07:17,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222434830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:17,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223044869] [2022-07-14 07:07:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:17,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:17,890 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) [2022-07-14 07:07:17,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 07:07:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 07:07:17,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:18,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:18,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223044869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:18,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:18,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-14 07:07:18,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25169153] [2022-07-14 07:07:18,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:18,005 INFO L87 Difference]: Start difference. First operand 329 states and 395 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-14 07:07:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:18,019 INFO L93 Difference]: Finished difference Result 342 states and 405 transitions. [2022-07-14 07:07:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2022-07-14 07:07:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:18,021 INFO L225 Difference]: With dead ends: 342 [2022-07-14 07:07:18,021 INFO L226 Difference]: Without dead ends: 342 [2022-07-14 07:07:18,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:07:18,026 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 31 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:18,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-14 07:07:18,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 328. [2022-07-14 07:07:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.2491582491582491) internal successors, (371), 311 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 391 transitions. [2022-07-14 07:07:18,046 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 391 transitions. Word has length 47 [2022-07-14 07:07:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:18,046 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 391 transitions. [2022-07-14 07:07:18,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-14 07:07:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 391 transitions. [2022-07-14 07:07:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:07:18,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:18,047 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:18,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:18,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:18,273 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2022-07-14 07:07:18,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:18,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600493429] [2022-07-14 07:07:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:18,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:18,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:18,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:18,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600493429] [2022-07-14 07:07:18,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600493429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887499024] [2022-07-14 07:07:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:18,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:18,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:18,479 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) [2022-07-14 07:07:18,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 07:07:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 07:07:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:18,705 INFO L390 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 [2022-07-14 07:07:18,713 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:07:18,715 INFO L390 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 [2022-07-14 07:07:18,753 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:18,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:18,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887499024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:18,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:18,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2022-07-14 07:07:18,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732063066] [2022-07-14 07:07:18,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:18,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:07:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:18,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:07:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-14 07:07:18,756 INFO L87 Difference]: Start difference. First operand 328 states and 391 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-14 07:07:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:18,880 INFO L93 Difference]: Finished difference Result 382 states and 444 transitions. [2022-07-14 07:07:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 07:07:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 48 [2022-07-14 07:07:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:18,882 INFO L225 Difference]: With dead ends: 382 [2022-07-14 07:07:18,882 INFO L226 Difference]: Without dead ends: 382 [2022-07-14 07:07:18,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:07:18,883 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 194 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:18,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 60 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-07-14 07:07:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 328. [2022-07-14 07:07:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.239057239057239) internal successors, (368), 311 states have internal predecessors, (368), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 388 transitions. [2022-07-14 07:07:18,893 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 388 transitions. Word has length 48 [2022-07-14 07:07:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:18,894 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 388 transitions. [2022-07-14 07:07:18,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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) [2022-07-14 07:07:18,895 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 388 transitions. [2022-07-14 07:07:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:07:18,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:18,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 07:07:18,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:19,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-14 07:07:19,114 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2022-07-14 07:07:19,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:19,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079030914] [2022-07-14 07:07:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:19,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:19,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:19,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079030914] [2022-07-14 07:07:19,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079030914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:19,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511769486] [2022-07-14 07:07:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:19,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:19,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:19,175 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) [2022-07-14 07:07:19,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 07:07:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:07:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:19,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:19,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511769486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:19,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:19,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-14 07:07:19,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435697087] [2022-07-14 07:07:19,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:19,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:19,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:19,304 INFO L87 Difference]: Start difference. First operand 328 states and 388 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-07-14 07:07:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:19,339 INFO L93 Difference]: Finished difference Result 341 states and 397 transitions. [2022-07-14 07:07:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 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 48 [2022-07-14 07:07:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:19,341 INFO L225 Difference]: With dead ends: 341 [2022-07-14 07:07:19,342 INFO L226 Difference]: Without dead ends: 341 [2022-07-14 07:07:19,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:07:19,342 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:19,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 76 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:19,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-14 07:07:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2022-07-14 07:07:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 310 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 383 transitions. [2022-07-14 07:07:19,351 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 383 transitions. Word has length 48 [2022-07-14 07:07:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:19,351 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 383 transitions. [2022-07-14 07:07:19,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 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) [2022-07-14 07:07:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 383 transitions. [2022-07-14 07:07:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 07:07:19,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:19,352 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:19,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:19,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 07:07:19,567 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1931998324, now seen corresponding path program 1 times [2022-07-14 07:07:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:19,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213585999] [2022-07-14 07:07:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:19,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 07:07:19,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213585999] [2022-07-14 07:07:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213585999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914607716] [2022-07-14 07:07:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:19,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:19,916 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) [2022-07-14 07:07:19,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 07:07:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:19,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 07:07:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:20,400 INFO L390 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 [2022-07-14 07:07:20,468 INFO L390 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 [2022-07-14 07:07:20,471 INFO L390 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 [2022-07-14 07:07:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:07:20,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:20,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914607716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:20,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:20,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-14 07:07:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175030876] [2022-07-14 07:07:20,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:20,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 07:07:20,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 07:07:20,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-14 07:07:20,610 INFO L87 Difference]: Start difference. First operand 327 states and 383 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 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) [2022-07-14 07:07:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:21,429 INFO L93 Difference]: Finished difference Result 360 states and 402 transitions. [2022-07-14 07:07:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 07:07:21,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 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 [2022-07-14 07:07:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:21,430 INFO L225 Difference]: With dead ends: 360 [2022-07-14 07:07:21,430 INFO L226 Difference]: Without dead ends: 360 [2022-07-14 07:07:21,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 07:07:21,432 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 323 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:21,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 208 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 414 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-07-14 07:07:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-14 07:07:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2022-07-14 07:07:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.2188552188552189) internal successors, (362), 310 states have internal predecessors, (362), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:21,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 382 transitions. [2022-07-14 07:07:21,438 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 382 transitions. Word has length 50 [2022-07-14 07:07:21,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:21,438 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 382 transitions. [2022-07-14 07:07:21,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 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) [2022-07-14 07:07:21,439 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 382 transitions. [2022-07-14 07:07:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 07:07:21,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:21,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 07:07:21,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:21,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 07:07:21,659 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2022-07-14 07:07:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543162248] [2022-07-14 07:07:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543162248] [2022-07-14 07:07:21,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543162248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:21,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446187189] [2022-07-14 07:07:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:21,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:21,719 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) [2022-07-14 07:07:21,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 07:07:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:07:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:21,797 INFO L390 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 [2022-07-14 07:07:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:21,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:21,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446187189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:21,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 07:07:21,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-14 07:07:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692318094] [2022-07-14 07:07:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:21,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:21,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:21,837 INFO L87 Difference]: Start difference. First operand 327 states and 382 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-07-14 07:07:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:21,891 INFO L93 Difference]: Finished difference Result 352 states and 400 transitions. [2022-07-14 07:07:21,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:21,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2022-07-14 07:07:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:21,892 INFO L225 Difference]: With dead ends: 352 [2022-07-14 07:07:21,892 INFO L226 Difference]: Without dead ends: 352 [2022-07-14 07:07:21,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:07:21,893 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:21,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 134 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:21,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-14 07:07:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 327. [2022-07-14 07:07:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.2053872053872055) internal successors, (358), 310 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 378 transitions. [2022-07-14 07:07:21,900 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 378 transitions. Word has length 49 [2022-07-14 07:07:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:21,900 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 378 transitions. [2022-07-14 07:07:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-07-14 07:07:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 378 transitions. [2022-07-14 07:07:21,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 07:07:21,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:21,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:21,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 07:07:22,115 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:22,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash 429224355, now seen corresponding path program 1 times [2022-07-14 07:07:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:22,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559300713] [2022-07-14 07:07:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:22,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:22,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 07:07:22,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559300713] [2022-07-14 07:07:22,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559300713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:22,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261620005] [2022-07-14 07:07:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:22,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:22,531 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) [2022-07-14 07:07:22,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 07:07:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:22,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 07:07:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:22,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:22,843 INFO L390 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 16 treesize of output 18 [2022-07-14 07:07:22,850 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 07:07:22,851 INFO L390 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 15 [2022-07-14 07:07:22,939 INFO L390 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 17 treesize of output 9 [2022-07-14 07:07:22,942 INFO L390 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 [2022-07-14 07:07:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:22,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:23,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:07:23,085 INFO L390 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 33 treesize of output 21 [2022-07-14 07:07:23,092 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-14 07:07:23,093 INFO L390 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 17 treesize of output 16 [2022-07-14 07:07:23,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:07:23,296 INFO L390 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 47 treesize of output 51 [2022-07-14 07:07:23,389 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:07:23,390 INFO L390 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 13 treesize of output 12 [2022-07-14 07:07:23,431 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-14 07:07:23,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-07-14 07:07:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:23,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261620005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:23,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:23,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 10] total 32 [2022-07-14 07:07:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055955844] [2022-07-14 07:07:23,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:23,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 07:07:23,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 07:07:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 07:07:23,467 INFO L87 Difference]: Start difference. First operand 327 states and 378 transitions. Second operand has 33 states, 31 states have (on average 4.225806451612903) internal successors, (131), 29 states have internal predecessors, (131), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 07:07:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:24,004 INFO L93 Difference]: Finished difference Result 388 states and 441 transitions. [2022-07-14 07:07:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:07:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 4.225806451612903) internal successors, (131), 29 states have internal predecessors, (131), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2022-07-14 07:07:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:24,008 INFO L225 Difference]: With dead ends: 388 [2022-07-14 07:07:24,008 INFO L226 Difference]: Without dead ends: 388 [2022-07-14 07:07:24,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=352, Invalid=1288, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 07:07:24,010 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 412 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:24,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 183 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 417 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-07-14 07:07:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-14 07:07:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 327. [2022-07-14 07:07:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.202020202020202) internal successors, (357), 310 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 377 transitions. [2022-07-14 07:07:24,024 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 377 transitions. Word has length 50 [2022-07-14 07:07:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:24,025 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 377 transitions. [2022-07-14 07:07:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 4.225806451612903) internal successors, (131), 29 states have internal predecessors, (131), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 07:07:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 377 transitions. [2022-07-14 07:07:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 07:07:24,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:24,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:24,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:24,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:24,239 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-14 07:07:24,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:24,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345301004] [2022-07-14 07:07:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:24,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:24,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:24,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:24,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345301004] [2022-07-14 07:07:24,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345301004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970228020] [2022-07-14 07:07:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:24,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:24,316 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) [2022-07-14 07:07:24,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 07:07:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:24,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 07:07:24,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:24,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:24,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970228020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:24,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:24,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-14 07:07:24,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87630355] [2022-07-14 07:07:24,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:24,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:07:24,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:24,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:07:24,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:24,610 INFO L87 Difference]: Start difference. First operand 327 states and 377 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 07:07:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:24,813 INFO L93 Difference]: Finished difference Result 354 states and 397 transitions. [2022-07-14 07:07:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:07:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-14 07:07:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:24,821 INFO L225 Difference]: With dead ends: 354 [2022-07-14 07:07:24,821 INFO L226 Difference]: Without dead ends: 354 [2022-07-14 07:07:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:07:24,822 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 301 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:24,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 113 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-14 07:07:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 327. [2022-07-14 07:07:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.1885521885521886) internal successors, (353), 310 states have internal predecessors, (353), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 373 transitions. [2022-07-14 07:07:24,829 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 373 transitions. Word has length 51 [2022-07-14 07:07:24,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:24,829 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 373 transitions. [2022-07-14 07:07:24,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 07:07:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 373 transitions. [2022-07-14 07:07:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 07:07:24,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:24,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:24,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-14 07:07:25,043 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-14 07:07:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10392686] [2022-07-14 07:07:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:25,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:25,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10392686] [2022-07-14 07:07:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10392686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380126323] [2022-07-14 07:07:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:25,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:25,139 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) [2022-07-14 07:07:25,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 07:07:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:25,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 07:07:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:07:25,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380126323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:25,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:25,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-14 07:07:25,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961810563] [2022-07-14 07:07:25,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:25,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 07:07:25,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 07:07:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:07:25,481 INFO L87 Difference]: Start difference. First operand 327 states and 373 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 07:07:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:25,780 INFO L93 Difference]: Finished difference Result 351 states and 392 transitions. [2022-07-14 07:07:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 07:07:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2022-07-14 07:07:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:25,782 INFO L225 Difference]: With dead ends: 351 [2022-07-14 07:07:25,782 INFO L226 Difference]: Without dead ends: 351 [2022-07-14 07:07:25,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-14 07:07:25,783 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 263 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:25,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 228 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-14 07:07:25,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 326. [2022-07-14 07:07:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.1717171717171717) internal successors, (348), 309 states have internal predecessors, (348), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:07:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 368 transitions. [2022-07-14 07:07:25,789 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 368 transitions. Word has length 52 [2022-07-14 07:07:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:25,789 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 368 transitions. [2022-07-14 07:07:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 07:07:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 368 transitions. [2022-07-14 07:07:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 07:07:25,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:25,790 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:25,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:26,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:26,003 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:26,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1335422540, now seen corresponding path program 2 times [2022-07-14 07:07:26,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:26,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452850433] [2022-07-14 07:07:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:26,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:26,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:26,171 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-14 07:07:26,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452850433] [2022-07-14 07:07:26,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452850433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:26,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701891627] [2022-07-14 07:07:26,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:26,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:26,176 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) [2022-07-14 07:07:26,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 07:07:26,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:07:26,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:26,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 07:07:26,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:26,549 INFO L390 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 [2022-07-14 07:07:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:07:26,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:26,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701891627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:26,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:26,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-14 07:07:26,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101765110] [2022-07-14 07:07:26,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:26,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 07:07:26,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 07:07:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-14 07:07:26,776 INFO L87 Difference]: Start difference. First operand 326 states and 368 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) [2022-07-14 07:07:27,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:27,404 INFO L93 Difference]: Finished difference Result 355 states and 392 transitions. [2022-07-14 07:07:27,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 07:07:27,405 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 [2022-07-14 07:07:27,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:27,406 INFO L225 Difference]: With dead ends: 355 [2022-07-14 07:07:27,406 INFO L226 Difference]: Without dead ends: 355 [2022-07-14 07:07:27,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 07:07:27,407 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 286 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:27,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 248 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 432 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-14 07:07:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-14 07:07:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 285. [2022-07-14 07:07:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 258 states have (on average 1.1627906976744187) internal successors, (300), 270 states have internal predecessors, (300), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-14 07:07:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 318 transitions. [2022-07-14 07:07:27,413 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 318 transitions. Word has length 56 [2022-07-14 07:07:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:27,413 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 318 transitions. [2022-07-14 07:07:27,413 INFO L496 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) [2022-07-14 07:07:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 318 transitions. [2022-07-14 07:07:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 07:07:27,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:27,414 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:27,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:27,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:27,614 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2007976587, now seen corresponding path program 1 times [2022-07-14 07:07:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:27,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248914531] [2022-07-14 07:07:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:27,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:27,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248914531] [2022-07-14 07:07:27,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248914531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:27,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932231167] [2022-07-14 07:07:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:27,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:27,926 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) [2022-07-14 07:07:27,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 07:07:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 07:07:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:28,179 INFO L390 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 [2022-07-14 07:07:28,304 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:07:28,304 INFO L390 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 [2022-07-14 07:07:28,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:28,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-14 07:07:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:28,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:28,580 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:07:28,580 INFO L390 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 13 treesize of output 12 [2022-07-14 07:07:28,788 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:07:28,789 INFO L390 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 13 treesize of output 12 [2022-07-14 07:07:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932231167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:28,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:28,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2022-07-14 07:07:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177431588] [2022-07-14 07:07:28,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:28,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 07:07:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 07:07:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-07-14 07:07:28,898 INFO L87 Difference]: Start difference. First operand 285 states and 318 transitions. Second operand has 26 states, 25 states have (on average 4.08) internal successors, (102), 22 states have internal predecessors, (102), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:29,804 INFO L93 Difference]: Finished difference Result 357 states and 391 transitions. [2022-07-14 07:07:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 07:07:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.08) internal successors, (102), 22 states have internal predecessors, (102), 4 states have call successors, (6), 5 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 [2022-07-14 07:07:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:29,807 INFO L225 Difference]: With dead ends: 357 [2022-07-14 07:07:29,807 INFO L226 Difference]: Without dead ends: 357 [2022-07-14 07:07:29,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=576, Invalid=2076, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 07:07:29,808 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 827 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:29,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [827 Valid, 180 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 416 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-07-14 07:07:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-14 07:07:29,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 282. [2022-07-14 07:07:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 258 states have (on average 1.1511627906976745) internal successors, (297), 267 states have internal predecessors, (297), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-14 07:07:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 315 transitions. [2022-07-14 07:07:29,815 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 315 transitions. Word has length 56 [2022-07-14 07:07:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:29,815 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 315 transitions. [2022-07-14 07:07:29,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.08) internal successors, (102), 22 states have internal predecessors, (102), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 315 transitions. [2022-07-14 07:07:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 07:07:29,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:29,816 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:29,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-14 07:07:30,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:30,031 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -170351524, now seen corresponding path program 1 times [2022-07-14 07:07:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:30,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623310376] [2022-07-14 07:07:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:30,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 07:07:30,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:30,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623310376] [2022-07-14 07:07:30,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623310376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:30,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360441891] [2022-07-14 07:07:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:30,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:30,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:30,152 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) [2022-07-14 07:07:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 07:07:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:30,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 07:07:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:30,341 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:07:30,342 INFO L390 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 [2022-07-14 07:07:30,492 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 07:07:30,493 INFO L390 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 [2022-07-14 07:07:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 07:07:30,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:30,581 INFO L390 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 [2022-07-14 07:07:30,696 INFO L390 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 [2022-07-14 07:07:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-14 07:07:30,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360441891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:30,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:30,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2022-07-14 07:07:30,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172139654] [2022-07-14 07:07:30,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:30,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 07:07:30,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 07:07:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-14 07:07:30,853 INFO L87 Difference]: Start difference. First operand 282 states and 315 transitions. Second operand has 23 states, 21 states have (on average 6.571428571428571) internal successors, (138), 21 states have internal predecessors, (138), 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) [2022-07-14 07:07:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:31,045 INFO L93 Difference]: Finished difference Result 298 states and 331 transitions. [2022-07-14 07:07:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:07:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 6.571428571428571) internal successors, (138), 21 states have internal predecessors, (138), 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 57 [2022-07-14 07:07:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:31,046 INFO L225 Difference]: With dead ends: 298 [2022-07-14 07:07:31,046 INFO L226 Difference]: Without dead ends: 298 [2022-07-14 07:07:31,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-07-14 07:07:31,047 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 220 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:31,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 93 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:07:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-14 07:07:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2022-07-14 07:07:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 258 states have (on average 1.1472868217054264) internal successors, (296), 266 states have internal predecessors, (296), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-14 07:07:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 314 transitions. [2022-07-14 07:07:31,051 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 314 transitions. Word has length 57 [2022-07-14 07:07:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:31,051 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 314 transitions. [2022-07-14 07:07:31,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 6.571428571428571) internal successors, (138), 21 states have internal predecessors, (138), 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) [2022-07-14 07:07:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 314 transitions. [2022-07-14 07:07:31,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 07:07:31,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:31,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:31,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-14 07:07:31,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:31,275 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:31,276 INFO L85 PathProgramCache]: Analyzing trace with hash -985929967, now seen corresponding path program 1 times [2022-07-14 07:07:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514498082] [2022-07-14 07:07:31,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:31,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:31,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:31,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 07:07:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514498082] [2022-07-14 07:07:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514498082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131064425] [2022-07-14 07:07:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:31,564 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) [2022-07-14 07:07:31,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 07:07:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 07:07:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:31,817 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:07:31,817 INFO L390 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 [2022-07-14 07:07:32,069 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-14 07:07:32,069 INFO L390 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 [2022-07-14 07:07:32,176 INFO L390 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 [2022-07-14 07:07:32,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 07:07:32,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:32,261 INFO L390 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 40 treesize of output 28 [2022-07-14 07:07:32,416 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:07:32,417 INFO L390 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 36 treesize of output 40 [2022-07-14 07:07:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 07:07:32,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131064425] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:32,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:32,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 13] total 40 [2022-07-14 07:07:32,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368411184] [2022-07-14 07:07:32,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:32,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 07:07:32,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 07:07:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 07:07:32,652 INFO L87 Difference]: Start difference. First operand 281 states and 314 transitions. Second operand has 42 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 33 states have internal predecessors, (148), 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) [2022-07-14 07:07:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:33,218 INFO L93 Difference]: Finished difference Result 326 states and 362 transitions. [2022-07-14 07:07:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:07:33,219 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 33 states have internal predecessors, (148), 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 58 [2022-07-14 07:07:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:33,219 INFO L225 Difference]: With dead ends: 326 [2022-07-14 07:07:33,219 INFO L226 Difference]: Without dead ends: 326 [2022-07-14 07:07:33,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 07:07:33,220 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 807 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:33,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 136 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 395 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-07-14 07:07:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-14 07:07:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-14 07:07:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 258 states have (on average 1.1434108527131783) internal successors, (295), 266 states have internal predecessors, (295), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-14 07:07:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 313 transitions. [2022-07-14 07:07:33,226 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 313 transitions. Word has length 58 [2022-07-14 07:07:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:33,226 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 313 transitions. [2022-07-14 07:07:33,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 33 states have internal predecessors, (148), 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) [2022-07-14 07:07:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 313 transitions. [2022-07-14 07:07:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 07:07:33,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:33,227 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-07-14 07:07:33,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-14 07:07:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-14 07:07:33,447 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1225182698, now seen corresponding path program 1 times [2022-07-14 07:07:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:33,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103766175] [2022-07-14 07:07:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:33,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:33,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:33,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:33,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:33,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103766175] [2022-07-14 07:07:33,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103766175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:33,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744805093] [2022-07-14 07:07:33,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:33,767 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) [2022-07-14 07:07:33,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 07:07:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:33,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 07:07:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:34,457 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 07:07:34,457 INFO L390 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 [2022-07-14 07:07:34,462 INFO L390 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 [2022-07-14 07:07:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:07:34,825 INFO L390 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 [2022-07-14 07:07:35,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-14 07:07:35,034 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:07:35,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 10 [2022-07-14 07:07:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:07:35,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:35,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744805093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:35,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:35,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 26 [2022-07-14 07:07:35,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319681671] [2022-07-14 07:07:35,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:35,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 07:07:35,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:35,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 07:07:35,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 07:07:35,256 INFO L87 Difference]: Start difference. First operand 281 states and 313 transitions. Second operand has 28 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:36,757 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2022-07-14 07:07:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 07:07:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-07-14 07:07:36,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:36,758 INFO L225 Difference]: With dead ends: 350 [2022-07-14 07:07:36,758 INFO L226 Difference]: Without dead ends: 350 [2022-07-14 07:07:36,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=577, Invalid=2615, Unknown=0, NotChecked=0, Total=3192 [2022-07-14 07:07:36,759 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 399 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:36,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 208 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 498 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-07-14 07:07:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-14 07:07:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 237. [2022-07-14 07:07:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 224 states have internal predecessors, (248), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 07:07:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 263 transitions. [2022-07-14 07:07:36,764 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 263 transitions. Word has length 58 [2022-07-14 07:07:36,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:36,765 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 263 transitions. [2022-07-14 07:07:36,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.076923076923077) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 07:07:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 263 transitions. [2022-07-14 07:07:36,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-14 07:07:36,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:36,766 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-14 07:07:36,987 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1709075571, now seen corresponding path program 1 times [2022-07-14 07:07:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954900343] [2022-07-14 07:07:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:37,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:37,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:07:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954900343] [2022-07-14 07:07:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954900343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100409602] [2022-07-14 07:07:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:37,200 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) [2022-07-14 07:07:37,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 07:07:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 07:07:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:37,372 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-14 07:07:37,373 INFO L390 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 [2022-07-14 07:07:37,474 INFO L390 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 [2022-07-14 07:07:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:07:37,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100409602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:37,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:37,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-07-14 07:07:37,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332741027] [2022-07-14 07:07:37,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:37,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-14 07:07:37,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-14 07:07:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-07-14 07:07:37,779 INFO L87 Difference]: Start difference. First operand 237 states and 263 transitions. Second operand has 18 states, 16 states have (on average 5.3125) internal successors, (85), 13 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) [2022-07-14 07:07:38,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:38,173 INFO L93 Difference]: Finished difference Result 296 states and 326 transitions. [2022-07-14 07:07:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 07:07:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.3125) internal successors, (85), 13 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 60 [2022-07-14 07:07:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:38,175 INFO L225 Difference]: With dead ends: 296 [2022-07-14 07:07:38,175 INFO L226 Difference]: Without dead ends: 296 [2022-07-14 07:07:38,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 07:07:38,176 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 341 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:38,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 231 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 281 Invalid, 0 Unknown, 154 Unchecked, 0.1s Time] [2022-07-14 07:07:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-14 07:07:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 236. [2022-07-14 07:07:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 218 states have (on average 1.1330275229357798) internal successors, (247), 223 states have internal predecessors, (247), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 07:07:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 262 transitions. [2022-07-14 07:07:38,181 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 262 transitions. Word has length 60 [2022-07-14 07:07:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:38,182 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 262 transitions. [2022-07-14 07:07:38,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.3125) internal successors, (85), 13 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) [2022-07-14 07:07:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 262 transitions. [2022-07-14 07:07:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 07:07:38,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:38,183 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:38,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-14 07:07:38,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-14 07:07:38,387 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1170616042, now seen corresponding path program 2 times [2022-07-14 07:07:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30070457] [2022-07-14 07:07:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:38,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 07:07:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:38,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30070457] [2022-07-14 07:07:38,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30070457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:07:38,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216873365] [2022-07-14 07:07:38,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:38,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 07:07:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:38,636 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) [2022-07-14 07:07:38,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 07:07:38,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:07:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:38,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 07:07:38,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:38,837 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:07:38,837 INFO L390 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 [2022-07-14 07:07:39,073 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-07-14 07:07:39,074 INFO L390 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 18 treesize of output 30 [2022-07-14 07:07:39,209 INFO L390 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 [2022-07-14 07:07:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:39,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:39,298 INFO L390 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 48 treesize of output 32 [2022-07-14 07:07:39,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:07:39,442 INFO L390 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 42 treesize of output 46 [2022-07-14 07:07:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:39,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216873365] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:39,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 07:07:39,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 39 [2022-07-14 07:07:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008066799] [2022-07-14 07:07:39,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 07:07:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 07:07:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 07:07:39,742 INFO L87 Difference]: Start difference. First operand 236 states and 262 transitions. Second operand has 41 states, 37 states have (on average 4.702702702702703) internal successors, (174), 33 states have internal predecessors, (174), 6 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 07:07:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:40,460 INFO L93 Difference]: Finished difference Result 270 states and 299 transitions. [2022-07-14 07:07:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 07:07:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 4.702702702702703) internal successors, (174), 33 states have internal predecessors, (174), 6 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2022-07-14 07:07:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:40,461 INFO L225 Difference]: With dead ends: 270 [2022-07-14 07:07:40,461 INFO L226 Difference]: Without dead ends: 270 [2022-07-14 07:07:40,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 07:07:40,462 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 493 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:40,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 219 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 726 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-07-14 07:07:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-14 07:07:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2022-07-14 07:07:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 218 states have (on average 1.128440366972477) internal successors, (246), 222 states have internal predecessors, (246), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 07:07:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 261 transitions. [2022-07-14 07:07:40,467 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 261 transitions. Word has length 66 [2022-07-14 07:07:40,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:40,467 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 261 transitions. [2022-07-14 07:07:40,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 4.702702702702703) internal successors, (174), 33 states have internal predecessors, (174), 6 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 07:07:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 261 transitions. [2022-07-14 07:07:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 07:07:40,468 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:40,468 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:40,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-14 07:07:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-14 07:07:40,671 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:40,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2022-07-14 07:07:40,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:40,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935713401] [2022-07-14 07:07:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:40,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 07:07:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:40,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-14 07:07:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:40,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-14 07:07:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-14 07:07:40,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 07:07:40,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935713401] [2022-07-14 07:07:40,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935713401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:40,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:40,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 07:07:40,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677783506] [2022-07-14 07:07:40,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:40,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 07:07:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:40,735 INFO L87 Difference]: Start difference. First operand 235 states and 261 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 07:07:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:40,778 INFO L93 Difference]: Finished difference Result 245 states and 270 transitions. [2022-07-14 07:07:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-07-14 07:07:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:40,779 INFO L225 Difference]: With dead ends: 245 [2022-07-14 07:07:40,779 INFO L226 Difference]: Without dead ends: 229 [2022-07-14 07:07:40,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:40,784 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:40,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 51 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-07-14 07:07:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2022-07-14 07:07:40,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 206 states have (on average 1.1213592233009708) internal successors, (231), 210 states have internal predecessors, (231), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-14 07:07:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 246 transitions. [2022-07-14 07:07:40,790 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 246 transitions. Word has length 67 [2022-07-14 07:07:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:40,790 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 246 transitions. [2022-07-14 07:07:40,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 07:07:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 246 transitions. [2022-07-14 07:07:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-14 07:07:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:40,794 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:40,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-14 07:07:40,795 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1133646903, now seen corresponding path program 1 times [2022-07-14 07:07:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 07:07:40,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607925852] [2022-07-14 07:07:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 07:07:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 07:07:40,814 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-14 07:07:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-14 07:07:40,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-14 07:07:40,858 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-14 07:07:40,860 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-07-14 07:07:40,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-07-14 07:07:40,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-07-14 07:07:40,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-07-14 07:07:40,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-07-14 07:07:40,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-07-14 07:07:40,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-07-14 07:07:40,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-07-14 07:07:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-14 07:07:40,869 INFO L356 BasicCegarLoop]: Path program 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:40,873 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 07:07:40,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 07:07:40 BoogieIcfgContainer [2022-07-14 07:07:40,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 07:07:40,960 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 07:07:40,960 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 07:07:40,960 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 07:07:40,961 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:06:58" (3/4) ... [2022-07-14 07:07:40,963 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-14 07:07:40,963 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 07:07:40,964 INFO L158 Benchmark]: Toolchain (without parser) took 43228.23ms. Allocated memory was 83.9MB in the beginning and 176.2MB in the end (delta: 92.3MB). Free memory was 46.6MB in the beginning and 81.3MB in the end (delta: -34.7MB). Peak memory consumption was 57.1MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,964 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 07:07:40,964 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.62ms. Allocated memory is still 83.9MB. Free memory was 46.4MB in the beginning and 50.4MB in the end (delta: -4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,964 INFO L158 Benchmark]: Boogie Procedure Inliner took 74.14ms. Allocated memory is still 83.9MB. Free memory was 50.4MB in the beginning and 48.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,964 INFO L158 Benchmark]: Boogie Preprocessor took 35.18ms. Allocated memory is still 83.9MB. Free memory was 48.2MB in the beginning and 46.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,965 INFO L158 Benchmark]: RCFGBuilder took 376.72ms. Allocated memory is still 83.9MB. Free memory was 46.6MB in the beginning and 32.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,965 INFO L158 Benchmark]: TraceAbstraction took 42260.42ms. Allocated memory was 100.7MB in the beginning and 176.2MB in the end (delta: 75.5MB). Free memory was 78.2MB in the beginning and 81.3MB in the end (delta: -3.1MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2022-07-14 07:07:40,965 INFO L158 Benchmark]: Witness Printer took 3.77ms. Allocated memory is still 176.2MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 07:07:40,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 463.62ms. Allocated memory is still 83.9MB. Free memory was 46.4MB in the beginning and 50.4MB in the end (delta: -4.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 74.14ms. Allocated memory is still 83.9MB. Free memory was 50.4MB in the beginning and 48.2MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.18ms. Allocated memory is still 83.9MB. Free memory was 48.2MB in the beginning and 46.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 376.72ms. Allocated memory is still 83.9MB. Free memory was 46.6MB in the beginning and 32.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 42260.42ms. Allocated memory was 100.7MB in the beginning and 176.2MB in the end (delta: 75.5MB). Free memory was 78.2MB in the beginning and 81.3MB in the end (delta: -3.1MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. * Witness Printer took 3.77ms. Allocated memory is still 176.2MB. Free memory is still 81.3MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L708] global = x [L709] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 42.1s, OverallIterations: 41, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 14.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11501 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11501 mSDsluCounter, 7431 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 961 IncrementalHoareTripleChecker+Unchecked, 5726 mSDsCounter, 1766 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9117 IncrementalHoareTripleChecker+Invalid, 11844 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1766 mSolverCounterUnsat, 1705 mSDtfsCounter, 9117 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2448 GetRequests, 1638 SyntacticMatches, 27 SemanticMatches, 783 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5862 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=490occurred in iteration=19, InterpolantAutomatonStates: 475, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 40 MinimizatonAttempts, 1922 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 17.5s InterpolantComputationTime, 2681 NumberOfCodeBlocks, 2681 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 3010 ConstructedInterpolants, 172 QuantifiedInterpolants, 39194 SizeOfPredicates, 125 NumberOfNonLiveVariables, 7317 ConjunctsInSsa, 535 ConjunctsInUnsatCore, 80 InterpolantComputations, 18 PerfectInterpolantSequences, 1165/2316 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-14 07:07:41,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- 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_3.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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 07:07:42,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 07:07:42,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 07:07:42,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 07:07:42,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 07:07:42,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 07:07:42,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 07:07:42,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 07:07:42,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 07:07:42,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 07:07:42,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 07:07:42,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 07:07:42,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 07:07:42,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 07:07:42,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 07:07:42,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 07:07:42,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 07:07:42,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 07:07:42,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 07:07:42,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 07:07:42,997 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 07:07:42,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 07:07:42,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 07:07:43,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 07:07:43,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 07:07:43,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 07:07:43,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 07:07:43,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 07:07:43,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 07:07:43,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 07:07:43,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 07:07:43,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 07:07:43,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 07:07:43,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 07:07:43,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 07:07:43,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 07:07:43,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 07:07:43,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 07:07:43,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 07:07:43,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 07:07:43,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 07:07:43,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 07:07:43,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 07:07:43,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 07:07:43,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 07:07:43,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 07:07:43,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 07:07:43,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 07:07:43,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 07:07:43,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 07:07:43,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 07:07:43,066 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 07:07:43,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 07:07:43,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 07:07:43,067 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 07:07:43,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 07:07:43,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 07:07:43,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 07:07:43,068 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 07:07:43,068 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 07:07:43,068 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 07:07:43,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 07:07:43,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 07:07:43,069 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 07:07:43,069 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 07:07:43,069 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 07:07:43,070 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 07:07:43,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 07:07:43,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 07:07:43,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 07:07:43,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:07:43,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 07:07:43,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 07:07:43,071 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 07:07:43,071 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 07:07:43,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 07:07:43,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2022-07-14 07:07:43,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 07:07:43,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 07:07:43,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 07:07:43,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 07:07:43,405 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 07:07:43,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-07-14 07:07:43,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37297e39/a7af890acddd4f8388ac85647c2c9c26/FLAGbce001a65 [2022-07-14 07:07:44,041 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 07:07:44,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-07-14 07:07:44,054 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37297e39/a7af890acddd4f8388ac85647c2c9c26/FLAGbce001a65 [2022-07-14 07:07:44,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f37297e39/a7af890acddd4f8388ac85647c2c9c26 [2022-07-14 07:07:44,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 07:07:44,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 07:07:44,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 07:07:44,376 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 07:07:44,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 07:07:44,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c4b7604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44, skipping insertion in model container [2022-07-14 07:07:44,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 07:07:44,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 07:07:44,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:07:44,807 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 07:07:44,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 07:07:44,877 INFO L208 MainTranslator]: Completed translation [2022-07-14 07:07:44,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44 WrapperNode [2022-07-14 07:07:44,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 07:07:44,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 07:07:44,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 07:07:44,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 07:07:44,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,950 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-07-14 07:07:44,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 07:07:44,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 07:07:44,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 07:07:44,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 07:07:44,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:44,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:45,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:45,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 07:07:45,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 07:07:45,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 07:07:45,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 07:07:45,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (1/1) ... [2022-07-14 07:07:45,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 07:07:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 07:07:45,056 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) [2022-07-14 07:07:45,075 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 [2022-07-14 07:07:45,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-14 07:07:45,099 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-14 07:07:45,099 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-14 07:07:45,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 07:07:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 07:07:45,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 07:07:45,233 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 07:07:45,234 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 07:07:45,585 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 07:07:45,591 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 07:07:45,591 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-14 07:07:45,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:07:45 BoogieIcfgContainer [2022-07-14 07:07:45,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 07:07:45,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 07:07:45,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 07:07:45,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 07:07:45,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 07:07:44" (1/3) ... [2022-07-14 07:07:45,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382abbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:07:45, skipping insertion in model container [2022-07-14 07:07:45,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 07:07:44" (2/3) ... [2022-07-14 07:07:45,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382abbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 07:07:45, skipping insertion in model container [2022-07-14 07:07:45,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 07:07:45" (3/3) ... [2022-07-14 07:07:45,603 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2022-07-14 07:07:45,623 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 07:07:45,624 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-14 07:07:45,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 07:07:45,695 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4b5021cb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7fd1871e [2022-07-14 07:07:45,696 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-14 07:07:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-07-14 07:07:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:07:45,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:45,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:07:45,710 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:45,717 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-14 07:07:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577003064] [2022-07-14 07:07:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:45,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:45,739 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) [2022-07-14 07:07:45,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 07:07:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:45,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:07:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:45,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:45,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577003064] [2022-07-14 07:07:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577003064] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:45,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:45,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 07:07:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868595272] [2022-07-14 07:07:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:45,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:45,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:45,965 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 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) [2022-07-14 07:07:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:46,185 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2022-07-14 07:07:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:46,189 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 [2022-07-14 07:07:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:46,204 INFO L225 Difference]: With dead ends: 109 [2022-07-14 07:07:46,205 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 07:07:46,207 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:46,212 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:46,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 07:07:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2022-07-14 07:07:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.709090909090909) internal successors, (94), 74 states have internal predecessors, (94), 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) [2022-07-14 07:07:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2022-07-14 07:07:46,273 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 6 [2022-07-14 07:07:46,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:46,274 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2022-07-14 07:07:46,274 INFO L496 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) [2022-07-14 07:07:46,274 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2022-07-14 07:07:46,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 07:07:46,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:46,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 07:07:46,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-14 07:07:46,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:46,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:46,491 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-14 07:07:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:46,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147521861] [2022-07-14 07:07:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:46,493 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:46,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:46,494 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) [2022-07-14 07:07:46,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 07:07:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 07:07:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:46,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:46,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:46,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147521861] [2022-07-14 07:07:46,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147521861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:46,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:46,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:07:46,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996473496] [2022-07-14 07:07:46,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:46,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:07:46,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:07:46,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:07:46,682 INFO L87 Difference]: Start difference. First operand 82 states and 107 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) [2022-07-14 07:07:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:46,880 INFO L93 Difference]: Finished difference Result 207 states and 270 transitions. [2022-07-14 07:07:46,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:07:46,881 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 [2022-07-14 07:07:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:46,883 INFO L225 Difference]: With dead ends: 207 [2022-07-14 07:07:46,883 INFO L226 Difference]: Without dead ends: 207 [2022-07-14 07:07:46,883 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:46,884 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 143 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 147 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 [2022-07-14 07:07:46,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 147 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-14 07:07:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2022-07-14 07:07:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.7606837606837606) internal successors, (206), 136 states have internal predecessors, (206), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-14 07:07:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 232 transitions. [2022-07-14 07:07:46,903 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 232 transitions. Word has length 6 [2022-07-14 07:07:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:46,904 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 232 transitions. [2022-07-14 07:07:46,904 INFO L496 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) [2022-07-14 07:07:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 232 transitions. [2022-07-14 07:07:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 07:07:46,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:46,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:46,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:47,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-14 07:07:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:47,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137985296] [2022-07-14 07:07:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:47,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:47,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:47,117 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) [2022-07-14 07:07:47,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 07:07:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:07:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:47,322 INFO L390 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 [2022-07-14 07:07:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:47,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:47,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:47,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137985296] [2022-07-14 07:07:47,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137985296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:47,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:47,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:47,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624127506] [2022-07-14 07:07:47,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:47,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:47,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:47,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:47,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:47,343 INFO L87 Difference]: Start difference. First operand 149 states and 232 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) [2022-07-14 07:07:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:47,627 INFO L93 Difference]: Finished difference Result 228 states and 328 transitions. [2022-07-14 07:07:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:47,628 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 [2022-07-14 07:07:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:47,630 INFO L225 Difference]: With dead ends: 228 [2022-07-14 07:07:47,630 INFO L226 Difference]: Without dead ends: 228 [2022-07-14 07:07:47,630 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:47,631 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 133 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:47,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 165 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:47,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-14 07:07:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2022-07-14 07:07:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.7416666666666667) internal successors, (209), 139 states have internal predecessors, (209), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-14 07:07:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 235 transitions. [2022-07-14 07:07:47,651 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 235 transitions. Word has length 7 [2022-07-14 07:07:47,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:47,652 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 235 transitions. [2022-07-14 07:07:47,652 INFO L496 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) [2022-07-14 07:07:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 235 transitions. [2022-07-14 07:07:47,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 07:07:47,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:47,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:47,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:47,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:47,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-14 07:07:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:47,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376790046] [2022-07-14 07:07:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:47,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:47,859 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) [2022-07-14 07:07:47,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 07:07:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 07:07:47,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:48,044 INFO L390 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 [2022-07-14 07:07:48,052 INFO L390 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 [2022-07-14 07:07:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:48,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:48,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:48,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376790046] [2022-07-14 07:07:48,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376790046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:48,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:48,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244360701] [2022-07-14 07:07:48,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:48,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:48,083 INFO L87 Difference]: Start difference. First operand 152 states and 235 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) [2022-07-14 07:07:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:48,336 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2022-07-14 07:07:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:48,337 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 [2022-07-14 07:07:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:48,339 INFO L225 Difference]: With dead ends: 209 [2022-07-14 07:07:48,339 INFO L226 Difference]: Without dead ends: 209 [2022-07-14 07:07:48,339 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:48,340 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 146 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 194 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 [2022-07-14 07:07:48,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 194 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:48,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-14 07:07:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 152. [2022-07-14 07:07:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.725) internal successors, (207), 139 states have internal predecessors, (207), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-14 07:07:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 233 transitions. [2022-07-14 07:07:48,378 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 233 transitions. Word has length 8 [2022-07-14 07:07:48,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:48,378 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 233 transitions. [2022-07-14 07:07:48,379 INFO L496 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) [2022-07-14 07:07:48,379 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 233 transitions. [2022-07-14 07:07:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 07:07:48,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:48,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:48,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:48,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:48,587 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-14 07:07:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:48,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275149781] [2022-07-14 07:07:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:48,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:48,591 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) [2022-07-14 07:07:48,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 07:07:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 07:07:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:48,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:48,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275149781] [2022-07-14 07:07:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275149781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:48,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:48,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152381290] [2022-07-14 07:07:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:48,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:48,719 INFO L87 Difference]: Start difference. First operand 152 states and 233 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) [2022-07-14 07:07:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:48,896 INFO L93 Difference]: Finished difference Result 234 states and 323 transitions. [2022-07-14 07:07:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:48,896 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 [2022-07-14 07:07:48,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:48,898 INFO L225 Difference]: With dead ends: 234 [2022-07-14 07:07:48,898 INFO L226 Difference]: Without dead ends: 234 [2022-07-14 07:07:48,898 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:48,899 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 132 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:48,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 179 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-14 07:07:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2022-07-14 07:07:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 151 states have (on average 1.6754966887417218) internal successors, (253), 171 states have internal predecessors, (253), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-14 07:07:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 279 transitions. [2022-07-14 07:07:48,918 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 279 transitions. Word has length 9 [2022-07-14 07:07:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:48,918 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 279 transitions. [2022-07-14 07:07:48,919 INFO L496 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) [2022-07-14 07:07:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 279 transitions. [2022-07-14 07:07:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 07:07:48,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:48,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:48,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:49,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:49,132 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-14 07:07:49,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:49,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882337471] [2022-07-14 07:07:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:49,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:49,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:49,134 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) [2022-07-14 07:07:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 07:07:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:07:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:49,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:49,273 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:49,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882337471] [2022-07-14 07:07:49,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882337471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:49,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:49,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:49,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607357800] [2022-07-14 07:07:49,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:07:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:07:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:07:49,276 INFO L87 Difference]: Start difference. First operand 185 states and 279 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) [2022-07-14 07:07:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:49,478 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2022-07-14 07:07:49,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:07:49,479 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 [2022-07-14 07:07:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:49,481 INFO L225 Difference]: With dead ends: 235 [2022-07-14 07:07:49,481 INFO L226 Difference]: Without dead ends: 235 [2022-07-14 07:07:49,481 INFO L412 NwaCegarLoop]: 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 [2022-07-14 07:07:49,482 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:49,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 207 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:07:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-14 07:07:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 199. [2022-07-14 07:07:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 164 states have (on average 1.670731707317073) internal successors, (274), 185 states have internal predecessors, (274), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-14 07:07:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 300 transitions. [2022-07-14 07:07:49,492 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 300 transitions. Word has length 10 [2022-07-14 07:07:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:49,492 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 300 transitions. [2022-07-14 07:07:49,492 INFO L496 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) [2022-07-14 07:07:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 300 transitions. [2022-07-14 07:07:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 07:07:49,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:49,493 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:49,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:49,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:49,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-14 07:07:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:49,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [447201993] [2022-07-14 07:07:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:49,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:49,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:49,705 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) [2022-07-14 07:07:49,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 07:07:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:07:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:49,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:50,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:50,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [447201993] [2022-07-14 07:07:50,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [447201993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:50,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:50,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-14 07:07:50,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673466668] [2022-07-14 07:07:50,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:50,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:07:50,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:07:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:07:50,437 INFO L87 Difference]: Start difference. First operand 199 states and 300 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-14 07:07:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:50,960 INFO L93 Difference]: Finished difference Result 361 states and 483 transitions. [2022-07-14 07:07:50,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:07:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 14 [2022-07-14 07:07:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:50,963 INFO L225 Difference]: With dead ends: 361 [2022-07-14 07:07:50,963 INFO L226 Difference]: Without dead ends: 361 [2022-07-14 07:07:50,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:07:50,964 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 366 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:50,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 294 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 07:07:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-07-14 07:07:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 234. [2022-07-14 07:07:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 197 states have (on average 1.649746192893401) internal successors, (325), 220 states have internal predecessors, (325), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-07-14 07:07:50,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 354 transitions. [2022-07-14 07:07:50,975 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 354 transitions. Word has length 14 [2022-07-14 07:07:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:50,975 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 354 transitions. [2022-07-14 07:07:50,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-07-14 07:07:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 354 transitions. [2022-07-14 07:07:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 07:07:50,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:50,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:50,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 07:07:51,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:51,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:51,186 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-14 07:07:51,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:51,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106112730] [2022-07-14 07:07:51,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:51,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:51,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:51,188 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:51,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-14 07:07:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:51,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 07:07:51,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:51,446 INFO L390 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 [2022-07-14 07:07:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:51,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:51,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:51,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106112730] [2022-07-14 07:07:51,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106112730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:51,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:51,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-14 07:07:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469855833] [2022-07-14 07:07:51,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:07:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:07:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:51,615 INFO L87 Difference]: Start difference. First operand 234 states and 354 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-07-14 07:07:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:52,086 INFO L93 Difference]: Finished difference Result 393 states and 564 transitions. [2022-07-14 07:07:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 07:07:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 [2022-07-14 07:07:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:52,089 INFO L225 Difference]: With dead ends: 393 [2022-07-14 07:07:52,089 INFO L226 Difference]: Without dead ends: 393 [2022-07-14 07:07:52,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-14 07:07:52,090 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 220 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:52,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 324 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 07:07:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-14 07:07:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 244. [2022-07-14 07:07:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 207 states have (on average 1.642512077294686) internal successors, (340), 230 states have internal predecessors, (340), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-07-14 07:07:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 369 transitions. [2022-07-14 07:07:52,102 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 369 transitions. Word has length 15 [2022-07-14 07:07:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:52,102 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 369 transitions. [2022-07-14 07:07:52,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-07-14 07:07:52,103 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 369 transitions. [2022-07-14 07:07:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 07:07:52,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:52,103 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:52,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-14 07:07:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:52,313 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:52,314 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-14 07:07:52,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:52,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424679589] [2022-07-14 07:07:52,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:52,315 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:52,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:52,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:52,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 07:07:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 07:07:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:52,628 INFO L390 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 [2022-07-14 07:07:52,638 INFO L390 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 [2022-07-14 07:07:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:52,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:52,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424679589] [2022-07-14 07:07:52,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424679589] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:52,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:52,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-14 07:07:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123998273] [2022-07-14 07:07:52,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:52,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:07:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:07:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:52,867 INFO L87 Difference]: Start difference. First operand 244 states and 369 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-07-14 07:07:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:54,124 INFO L93 Difference]: Finished difference Result 591 states and 775 transitions. [2022-07-14 07:07:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 07:07:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 16 [2022-07-14 07:07:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:54,127 INFO L225 Difference]: With dead ends: 591 [2022-07-14 07:07:54,128 INFO L226 Difference]: Without dead ends: 591 [2022-07-14 07:07:54,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-14 07:07:54,128 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 520 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:54,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 532 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-14 07:07:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-07-14 07:07:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 324. [2022-07-14 07:07:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 282 states have (on average 1.6418439716312057) internal successors, (463), 308 states have internal predecessors, (463), 9 states have call successors, (9), 6 states have call predecessors, (9), 13 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-14 07:07:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 500 transitions. [2022-07-14 07:07:54,141 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 500 transitions. Word has length 16 [2022-07-14 07:07:54,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:54,141 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 500 transitions. [2022-07-14 07:07:54,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-07-14 07:07:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 500 transitions. [2022-07-14 07:07:54,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:07:54,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:54,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:54,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:54,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:54,352 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:54,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2022-07-14 07:07:54,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:54,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053427146] [2022-07-14 07:07:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:54,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:54,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:54,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-14 07:07:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 07:07:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:54,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:54,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:54,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053427146] [2022-07-14 07:07:54,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053427146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:54,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:54,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 07:07:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257039035] [2022-07-14 07:07:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:54,440 INFO L87 Difference]: Start difference. First operand 324 states and 500 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) [2022-07-14 07:07:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:54,461 INFO L93 Difference]: Finished difference Result 469 states and 722 transitions. [2022-07-14 07:07:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:54,462 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 [2022-07-14 07:07:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:54,465 INFO L225 Difference]: With dead ends: 469 [2022-07-14 07:07:54,465 INFO L226 Difference]: Without dead ends: 469 [2022-07-14 07:07:54,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:54,466 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:54,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-14 07:07:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 449. [2022-07-14 07:07:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 397 states have (on average 1.6397984886649875) internal successors, (651), 426 states have internal predecessors, (651), 13 states have call successors, (13), 9 states have call predecessors, (13), 19 states have return successors, (50), 13 states have call predecessors, (50), 13 states have call successors, (50) [2022-07-14 07:07:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 714 transitions. [2022-07-14 07:07:54,481 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 714 transitions. Word has length 18 [2022-07-14 07:07:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:54,482 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 714 transitions. [2022-07-14 07:07:54,482 INFO L496 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) [2022-07-14 07:07:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 714 transitions. [2022-07-14 07:07:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 07:07:54,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:54,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:54,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:54,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2022-07-14 07:07:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:54,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009271411] [2022-07-14 07:07:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:54,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:54,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:54,695 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 07:07:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 07:07:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:54,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:54,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:54,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009271411] [2022-07-14 07:07:54,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009271411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:54,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:54,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 07:07:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916172875] [2022-07-14 07:07:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:54,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:54,822 INFO L87 Difference]: Start difference. First operand 449 states and 714 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) 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) [2022-07-14 07:07:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:54,852 INFO L93 Difference]: Finished difference Result 501 states and 764 transitions. [2022-07-14 07:07:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) 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 [2022-07-14 07:07:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:54,855 INFO L225 Difference]: With dead ends: 501 [2022-07-14 07:07:54,855 INFO L226 Difference]: Without dead ends: 501 [2022-07-14 07:07:54,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:54,856 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:54,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 114 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-14 07:07:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 483. [2022-07-14 07:07:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 427 states have (on average 1.6182669789227166) internal successors, (691), 458 states have internal predecessors, (691), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (53), 14 states have call predecessors, (53), 14 states have call successors, (53) [2022-07-14 07:07:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 758 transitions. [2022-07-14 07:07:54,875 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 758 transitions. Word has length 18 [2022-07-14 07:07:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:54,876 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 758 transitions. [2022-07-14 07:07:54,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) 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) [2022-07-14 07:07:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 758 transitions. [2022-07-14 07:07:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 07:07:54,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:54,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:07:54,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:55,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:55,088 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:55,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2022-07-14 07:07:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530084406] [2022-07-14 07:07:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:55,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:55,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:55,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-14 07:07:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:55,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:07:55,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:55,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:55,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530084406] [2022-07-14 07:07:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530084406] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:55,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:55,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-14 07:07:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56256792] [2022-07-14 07:07:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:55,234 INFO L87 Difference]: Start difference. First operand 483 states and 758 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) [2022-07-14 07:07:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:55,270 INFO L93 Difference]: Finished difference Result 498 states and 758 transitions. [2022-07-14 07:07:55,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:55,273 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 [2022-07-14 07:07:55,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:55,275 INFO L225 Difference]: With dead ends: 498 [2022-07-14 07:07:55,275 INFO L226 Difference]: Without dead ends: 498 [2022-07-14 07:07:55,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:55,276 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:55,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-14 07:07:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 483. [2022-07-14 07:07:55,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 427 states have (on average 1.6088992974238876) internal successors, (687), 458 states have internal predecessors, (687), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (53), 14 states have call predecessors, (53), 14 states have call successors, (53) [2022-07-14 07:07:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 754 transitions. [2022-07-14 07:07:55,290 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 754 transitions. Word has length 19 [2022-07-14 07:07:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:55,290 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 754 transitions. [2022-07-14 07:07:55,291 INFO L496 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) [2022-07-14 07:07:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 754 transitions. [2022-07-14 07:07:55,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 07:07:55,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:55,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-14 07:07:55,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:55,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:55,506 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:55,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:55,506 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-07-14 07:07:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:55,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935716404] [2022-07-14 07:07:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:07:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:55,508 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:55,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 07:07:55,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:07:55,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:07:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 07:07:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:55,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:07:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:56,743 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:56,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935716404] [2022-07-14 07:07:56,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935716404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:07:56,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:07:56,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-07-14 07:07:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896246399] [2022-07-14 07:07:56,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:07:56,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:07:56,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:56,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:07:56,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:07:56,744 INFO L87 Difference]: Start difference. First operand 483 states and 754 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-14 07:07:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:59,634 INFO L93 Difference]: Finished difference Result 781 states and 1117 transitions. [2022-07-14 07:07:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 07:07:59,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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 22 [2022-07-14 07:07:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:59,638 INFO L225 Difference]: With dead ends: 781 [2022-07-14 07:07:59,638 INFO L226 Difference]: Without dead ends: 781 [2022-07-14 07:07:59,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-14 07:07:59,638 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 512 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:59,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 451 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-14 07:07:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-07-14 07:07:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 507. [2022-07-14 07:07:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 450 states have (on average 1.6155555555555556) internal successors, (727), 482 states have internal predecessors, (727), 14 states have call successors, (14), 10 states have call predecessors, (14), 23 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2022-07-14 07:07:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 789 transitions. [2022-07-14 07:07:59,659 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 789 transitions. Word has length 22 [2022-07-14 07:07:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:59,660 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 789 transitions. [2022-07-14 07:07:59,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 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) [2022-07-14 07:07:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 789 transitions. [2022-07-14 07:07:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 07:07:59,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:59,661 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:59,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 07:07:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:07:59,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:07:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:07:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2022-07-14 07:07:59,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:07:59,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84388210] [2022-07-14 07:07:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:07:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:07:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:07:59,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:07:59,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 07:07:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:07:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 07:07:59,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:07:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:07:59,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:07:59,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:07:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84388210] [2022-07-14 07:07:59,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84388210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:07:59,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:07:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:07:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453488742] [2022-07-14 07:07:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:07:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:07:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:07:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:07:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:59,952 INFO L87 Difference]: Start difference. First operand 507 states and 789 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) 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) [2022-07-14 07:07:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:07:59,959 INFO L93 Difference]: Finished difference Result 351 states and 526 transitions. [2022-07-14 07:07:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:07:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) 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 [2022-07-14 07:07:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:07:59,961 INFO L225 Difference]: With dead ends: 351 [2022-07-14 07:07:59,961 INFO L226 Difference]: Without dead ends: 351 [2022-07-14 07:07:59,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:07:59,963 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:07:59,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:07:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-14 07:07:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 350. [2022-07-14 07:07:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 305 states have (on average 1.5934426229508196) internal successors, (486), 332 states have internal predecessors, (486), 10 states have call successors, (10), 7 states have call predecessors, (10), 15 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2022-07-14 07:07:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 525 transitions. [2022-07-14 07:07:59,974 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 525 transitions. Word has length 25 [2022-07-14 07:07:59,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:07:59,975 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 525 transitions. [2022-07-14 07:07:59,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) 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) [2022-07-14 07:07:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 525 transitions. [2022-07-14 07:07:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 07:07:59,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:07:59,976 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:07:59,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:00,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:00,186 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2022-07-14 07:08:00,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:00,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549675632] [2022-07-14 07:08:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:00,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:00,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:00,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:00,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 07:08:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 07:08:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:02,637 INFO L390 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 [2022-07-14 07:08:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:05,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549675632] [2022-07-14 07:08:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549675632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:05,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1910152732] [2022-07-14 07:08:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:08:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:08:05,225 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:08:05,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-14 07:08:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-14 07:08:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:07,790 INFO L390 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 [2022-07-14 07:08:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:10,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1910152732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:10,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:10,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-14 07:08:10,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987485905] [2022-07-14 07:08:10,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:10,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 07:08:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:10,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 07:08:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2022-07-14 07:08:10,326 INFO L87 Difference]: Start difference. First operand 350 states and 525 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-14 07:08:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:14,870 INFO L93 Difference]: Finished difference Result 563 states and 778 transitions. [2022-07-14 07:08:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 07:08:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 27 [2022-07-14 07:08:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:14,874 INFO L225 Difference]: With dead ends: 563 [2022-07-14 07:08:14,874 INFO L226 Difference]: Without dead ends: 563 [2022-07-14 07:08:14,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=74, Invalid=162, Unknown=4, NotChecked=0, Total=240 [2022-07-14 07:08:14,875 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 287 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:14,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 209 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 115 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-07-14 07:08:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-14 07:08:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 467. [2022-07-14 07:08:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 413 states have (on average 1.5520581113801453) internal successors, (641), 443 states have internal predecessors, (641), 13 states have call successors, (13), 10 states have call predecessors, (13), 21 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2022-07-14 07:08:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 691 transitions. [2022-07-14 07:08:14,889 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 691 transitions. Word has length 27 [2022-07-14 07:08:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:14,889 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 691 transitions. [2022-07-14 07:08:14,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-14 07:08:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 691 transitions. [2022-07-14 07:08:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 07:08:14,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:14,890 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:08:14,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:15,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-14 07:08:15,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:15,294 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:15,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2022-07-14 07:08:15,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:15,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771152239] [2022-07-14 07:08:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:15,296 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:15,297 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:15,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 07:08:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 07:08:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:15,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:08:15,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:15,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771152239] [2022-07-14 07:08:15,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771152239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:08:15,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:08:15,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 07:08:15,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375526753] [2022-07-14 07:08:15,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:08:15,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 07:08:15,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:15,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 07:08:15,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:08:15,641 INFO L87 Difference]: Start difference. First operand 467 states and 691 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) [2022-07-14 07:08:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:15,956 INFO L93 Difference]: Finished difference Result 540 states and 764 transitions. [2022-07-14 07:08:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 07:08:15,957 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 [2022-07-14 07:08:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:15,959 INFO L225 Difference]: With dead ends: 540 [2022-07-14 07:08:15,959 INFO L226 Difference]: Without dead ends: 540 [2022-07-14 07:08:15,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:08:15,960 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 119 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:15,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 195 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:08:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-14 07:08:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 472. [2022-07-14 07:08:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 421 states have (on average 1.5439429928741093) internal successors, (650), 449 states have internal predecessors, (650), 12 states have call successors, (12), 10 states have call predecessors, (12), 19 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-07-14 07:08:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 695 transitions. [2022-07-14 07:08:15,974 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 695 transitions. Word has length 28 [2022-07-14 07:08:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:15,974 INFO L495 AbstractCegarLoop]: Abstraction has 472 states and 695 transitions. [2022-07-14 07:08:15,974 INFO L496 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) [2022-07-14 07:08:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 695 transitions. [2022-07-14 07:08:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 07:08:15,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:15,976 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:08:15,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-14 07:08:16,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:16,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash -719880979, now seen corresponding path program 1 times [2022-07-14 07:08:16,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:16,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510659022] [2022-07-14 07:08:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:16,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:16,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:16,188 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:16,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 07:08:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 07:08:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:18,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:18,935 INFO L390 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 [2022-07-14 07:08:19,110 INFO L390 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 [2022-07-14 07:08:19,117 INFO L390 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 [2022-07-14 07:08:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:21,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510659022] [2022-07-14 07:08:21,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510659022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:21,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396824043] [2022-07-14 07:08:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:21,524 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:08:21,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:08:21,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:08:21,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-14 07:08:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:21,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 07:08:21,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:26,169 INFO L390 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 [2022-07-14 07:08:26,238 INFO L390 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 [2022-07-14 07:08:26,244 INFO L390 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 [2022-07-14 07:08:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:26,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:28,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396824043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:28,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:28,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-14 07:08:28,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489441446] [2022-07-14 07:08:28,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:28,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 07:08:28,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 07:08:28,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-14 07:08:28,483 INFO L87 Difference]: Start difference. First operand 472 states and 695 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-14 07:08:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:35,466 INFO L93 Difference]: Finished difference Result 576 states and 777 transitions. [2022-07-14 07:08:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:08:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 29 [2022-07-14 07:08:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:35,469 INFO L225 Difference]: With dead ends: 576 [2022-07-14 07:08:35,469 INFO L226 Difference]: Without dead ends: 576 [2022-07-14 07:08:35,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-14 07:08:35,470 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 263 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:35,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 271 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 221 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-07-14 07:08:35,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-14 07:08:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 484. [2022-07-14 07:08:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 434 states have (on average 1.5391705069124424) internal successors, (668), 461 states have internal predecessors, (668), 12 states have call successors, (12), 10 states have call predecessors, (12), 18 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-07-14 07:08:35,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 710 transitions. [2022-07-14 07:08:35,482 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 710 transitions. Word has length 29 [2022-07-14 07:08:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:35,482 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 710 transitions. [2022-07-14 07:08:35,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-07-14 07:08:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 710 transitions. [2022-07-14 07:08:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 07:08:35,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:35,483 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:08:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:35,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:35,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:35,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-07-14 07:08:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:35,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048703723] [2022-07-14 07:08:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:35,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:35,890 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 07:08:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:35,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:08:35,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:08:36,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:08:36,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048703723] [2022-07-14 07:08:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048703723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:08:36,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:36,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-14 07:08:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554809303] [2022-07-14 07:08:36,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 07:08:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 07:08:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:08:36,274 INFO L87 Difference]: Start difference. First operand 484 states and 710 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 07:08:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:36,768 INFO L93 Difference]: Finished difference Result 639 states and 857 transitions. [2022-07-14 07:08:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:08:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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 [2022-07-14 07:08:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:36,771 INFO L225 Difference]: With dead ends: 639 [2022-07-14 07:08:36,771 INFO L226 Difference]: Without dead ends: 639 [2022-07-14 07:08:36,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-14 07:08:36,772 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 294 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:36,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 271 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 07:08:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-14 07:08:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 565. [2022-07-14 07:08:36,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 513 states have (on average 1.4834307992202729) internal successors, (761), 540 states have internal predecessors, (761), 12 states have call successors, (12), 12 states have call predecessors, (12), 20 states have return successors, (28), 12 states have call predecessors, (28), 12 states have call successors, (28) [2022-07-14 07:08:36,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 801 transitions. [2022-07-14 07:08:36,786 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 801 transitions. Word has length 30 [2022-07-14 07:08:36,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:36,786 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 801 transitions. [2022-07-14 07:08:36,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-07-14 07:08:36,787 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 801 transitions. [2022-07-14 07:08:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 07:08:36,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:36,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:08:36,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-14 07:08:36,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:36,997 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:36,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:36,997 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-07-14 07:08:36,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:36,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294963851] [2022-07-14 07:08:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:36,998 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:36,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:37,000 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:37,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-14 07:08:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:37,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 07:08:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:37,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:08:37,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 07:08:37,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:37,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294963851] [2022-07-14 07:08:37,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294963851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:08:37,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:37,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-14 07:08:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324584110] [2022-07-14 07:08:37,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:08:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:08:37,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:08:37,529 INFO L87 Difference]: Start difference. First operand 565 states and 801 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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) [2022-07-14 07:08:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:38,170 INFO L93 Difference]: Finished difference Result 664 states and 865 transitions. [2022-07-14 07:08:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 07:08:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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 [2022-07-14 07:08:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:38,174 INFO L225 Difference]: With dead ends: 664 [2022-07-14 07:08:38,174 INFO L226 Difference]: Without dead ends: 664 [2022-07-14 07:08:38,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:08:38,175 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 503 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:38,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 234 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 07:08:38,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-07-14 07:08:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 615. [2022-07-14 07:08:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 561 states have (on average 1.4402852049910873) internal successors, (808), 590 states have internal predecessors, (808), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-14 07:08:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 846 transitions. [2022-07-14 07:08:38,189 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 846 transitions. Word has length 31 [2022-07-14 07:08:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:38,190 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 846 transitions. [2022-07-14 07:08:38,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 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) [2022-07-14 07:08:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 846 transitions. [2022-07-14 07:08:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-14 07:08:38,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:38,191 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:08:38,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:38,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:38,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2022-07-14 07:08:38,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:38,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621873051] [2022-07-14 07:08:38,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:38,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:38,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:38,402 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:38,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 07:08:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 07:08:38,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:40,915 INFO L390 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 [2022-07-14 07:08:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:41,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:46,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:46,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621873051] [2022-07-14 07:08:46,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621873051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:46,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029373666] [2022-07-14 07:08:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:46,254 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:08:46,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:08:46,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:08:46,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-07-14 07:08:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-14 07:08:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:08:48,730 INFO L390 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 [2022-07-14 07:08:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:48,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:51,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1029373666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:08:51,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:51,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-14 07:08:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606051731] [2022-07-14 07:08:51,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:08:51,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:51,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:08:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=98, Unknown=2, NotChecked=0, Total=132 [2022-07-14 07:08:51,560 INFO L87 Difference]: Start difference. First operand 615 states and 846 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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) [2022-07-14 07:08:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:56,398 INFO L93 Difference]: Finished difference Result 849 states and 1109 transitions. [2022-07-14 07:08:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 07:08:56,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 35 [2022-07-14 07:08:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:56,402 INFO L225 Difference]: With dead ends: 849 [2022-07-14 07:08:56,402 INFO L226 Difference]: Without dead ends: 849 [2022-07-14 07:08:56,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-07-14 07:08:56,403 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 225 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:56,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 302 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-07-14 07:08:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-07-14 07:08:56,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 702. [2022-07-14 07:08:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 645 states have (on average 1.4372093023255814) internal successors, (927), 675 states have internal predecessors, (927), 13 states have call successors, (13), 13 states have call predecessors, (13), 24 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2022-07-14 07:08:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 966 transitions. [2022-07-14 07:08:56,419 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 966 transitions. Word has length 35 [2022-07-14 07:08:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:56,419 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 966 transitions. [2022-07-14 07:08:56,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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) [2022-07-14 07:08:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 966 transitions. [2022-07-14 07:08:56,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 07:08:56,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:56,420 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:08:56,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:56,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 07:08:56,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:08:56,824 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:08:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:08:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2022-07-14 07:08:56,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:08:56,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278811836] [2022-07-14 07:08:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:08:56,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:08:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:08:56,827 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:08:56,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 07:08:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:08:56,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-14 07:08:56,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:08:57,572 INFO L390 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 11 [2022-07-14 07:08:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:57,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:08:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:08:58,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:08:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278811836] [2022-07-14 07:08:58,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278811836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:08:58,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:08:58,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-14 07:08:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729735042] [2022-07-14 07:08:58,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:08:58,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 07:08:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:08:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 07:08:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-07-14 07:08:58,360 INFO L87 Difference]: Start difference. First operand 702 states and 966 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 07:08:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:08:59,784 INFO L93 Difference]: Finished difference Result 679 states and 907 transitions. [2022-07-14 07:08:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:08:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-14 07:08:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:08:59,788 INFO L225 Difference]: With dead ends: 679 [2022-07-14 07:08:59,788 INFO L226 Difference]: Without dead ends: 679 [2022-07-14 07:08:59,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-07-14 07:08:59,789 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 315 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:08:59,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 564 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-14 07:08:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-07-14 07:08:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 495. [2022-07-14 07:08:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 451 states have (on average 1.4634146341463414) internal successors, (660), 476 states have internal predecessors, (660), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-07-14 07:08:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 685 transitions. [2022-07-14 07:08:59,799 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 685 transitions. Word has length 36 [2022-07-14 07:08:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:08:59,799 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 685 transitions. [2022-07-14 07:08:59,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 07:08:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 685 transitions. [2022-07-14 07:08:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 07:08:59,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:08:59,801 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-14 07:08:59,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:00,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:00,008 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 36525042, now seen corresponding path program 1 times [2022-07-14 07:09:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:00,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018495127] [2022-07-14 07:09:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:00,009 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:00,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:00,010 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:00,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-14 07:09:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 07:09:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:09:00,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:09:00,223 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:00,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018495127] [2022-07-14 07:09:00,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018495127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:09:00,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:09:00,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-14 07:09:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104830623] [2022-07-14 07:09:00,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:09:00,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:09:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:09:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:09:00,225 INFO L87 Difference]: Start difference. First operand 495 states and 685 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2022-07-14 07:09:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:00,338 INFO L93 Difference]: Finished difference Result 409 states and 511 transitions. [2022-07-14 07:09:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:09:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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 44 [2022-07-14 07:09:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:00,340 INFO L225 Difference]: With dead ends: 409 [2022-07-14 07:09:00,340 INFO L226 Difference]: Without dead ends: 409 [2022-07-14 07:09:00,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-14 07:09:00,341 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 142 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:00,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 336 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:09:00,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-07-14 07:09:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 363. [2022-07-14 07:09:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 322 states have (on average 1.3850931677018634) internal successors, (446), 346 states have internal predecessors, (446), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-14 07:09:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 468 transitions. [2022-07-14 07:09:00,348 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 468 transitions. Word has length 44 [2022-07-14 07:09:00,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:00,349 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 468 transitions. [2022-07-14 07:09:00,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2022-07-14 07:09:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 468 transitions. [2022-07-14 07:09:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:09:00,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:00,350 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:09:00,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:00,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:00,560 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:00,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2022-07-14 07:09:00,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:00,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [419696471] [2022-07-14 07:09:00,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:00,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:00,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:00,562 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:00,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 07:09:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:00,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 07:09:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:03,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:03,210 INFO L390 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 [2022-07-14 07:09:03,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:09:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:05,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:05,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [419696471] [2022-07-14 07:09:05,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [419696471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:09:05,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106873536] [2022-07-14 07:09:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:05,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:09:05,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:09:05,776 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:09:05,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 07:09:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:05,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 07:09:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:08,553 INFO L390 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 [2022-07-14 07:09:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:09:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:10,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106873536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:09:10,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:09:10,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-14 07:09:10,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66279793] [2022-07-14 07:09:10,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:09:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 07:09:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 07:09:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2022-07-14 07:09:10,964 INFO L87 Difference]: Start difference. First operand 363 states and 468 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:09:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:15,539 INFO L93 Difference]: Finished difference Result 407 states and 492 transitions. [2022-07-14 07:09:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 07:09:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-07-14 07:09:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:15,542 INFO L225 Difference]: With dead ends: 407 [2022-07-14 07:09:15,542 INFO L226 Difference]: Without dead ends: 407 [2022-07-14 07:09:15,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=117, Invalid=259, Unknown=4, NotChecked=0, Total=380 [2022-07-14 07:09:15,543 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 224 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:15,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 365 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 170 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-07-14 07:09:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-07-14 07:09:15,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 367. [2022-07-14 07:09:15,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 327 states have (on average 1.3761467889908257) internal successors, (450), 350 states have internal predecessors, (450), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 470 transitions. [2022-07-14 07:09:15,550 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 470 transitions. Word has length 48 [2022-07-14 07:09:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:15,551 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 470 transitions. [2022-07-14 07:09:15,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:09:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 470 transitions. [2022-07-14 07:09:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 07:09:15,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:15,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:09:15,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:15,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:15,956 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2022-07-14 07:09:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:15,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837455216] [2022-07-14 07:09:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:15,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:15,958 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:15,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 07:09:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 07:09:16,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:09:16,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:09:16,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837455216] [2022-07-14 07:09:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837455216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:09:16,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:09:16,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:09:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785328010] [2022-07-14 07:09:16,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:09:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:09:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:16,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:09:16,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:09:16,123 INFO L87 Difference]: Start difference. First operand 367 states and 470 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-14 07:09:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:16,150 INFO L93 Difference]: Finished difference Result 379 states and 476 transitions. [2022-07-14 07:09:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 07:09:16,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2022-07-14 07:09:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:16,152 INFO L225 Difference]: With dead ends: 379 [2022-07-14 07:09:16,152 INFO L226 Difference]: Without dead ends: 379 [2022-07-14 07:09:16,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:09:16,153 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:16,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 117 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:09:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-14 07:09:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 365. [2022-07-14 07:09:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 327 states have (on average 1.3516819571865444) internal successors, (442), 348 states have internal predecessors, (442), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 462 transitions. [2022-07-14 07:09:16,160 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 462 transitions. Word has length 47 [2022-07-14 07:09:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:16,161 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 462 transitions. [2022-07-14 07:09:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-14 07:09:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 462 transitions. [2022-07-14 07:09:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 07:09:16,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:16,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:09:16,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:16,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:16,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037283, now seen corresponding path program 1 times [2022-07-14 07:09:16,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:16,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627402298] [2022-07-14 07:09:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:16,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:16,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:16,376 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:16,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-14 07:09:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:16,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 07:09:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-14 07:09:16,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:09:16,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:16,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627402298] [2022-07-14 07:09:16,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627402298] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:09:16,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:09:16,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:09:16,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524317428] [2022-07-14 07:09:16,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:09:16,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 07:09:16,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:16,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 07:09:16,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:09:16,475 INFO L87 Difference]: Start difference. First operand 365 states and 462 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-14 07:09:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:16,480 INFO L93 Difference]: Finished difference Result 342 states and 414 transitions. [2022-07-14 07:09:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 07:09:16,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 47 [2022-07-14 07:09:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:16,482 INFO L225 Difference]: With dead ends: 342 [2022-07-14 07:09:16,482 INFO L226 Difference]: Without dead ends: 342 [2022-07-14 07:09:16,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 07:09:16,484 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 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 [2022-07-14 07:09:16,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 07:09:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-14 07:09:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 330. [2022-07-14 07:09:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 297 states have (on average 1.2861952861952861) internal successors, (382), 313 states have internal predecessors, (382), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 402 transitions. [2022-07-14 07:09:16,500 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 402 transitions. Word has length 47 [2022-07-14 07:09:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:16,500 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 402 transitions. [2022-07-14 07:09:16,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-07-14 07:09:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 402 transitions. [2022-07-14 07:09:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:09:16,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:16,501 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:09:16,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:16,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:16,702 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2022-07-14 07:09:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:16,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169524974] [2022-07-14 07:09:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:16,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:16,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:16,704 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 07:09:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:09:16,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:17,118 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:09:17,118 INFO L390 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 12 treesize of output 12 [2022-07-14 07:09:17,525 INFO L390 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 14 treesize of output 16 [2022-07-14 07:09:17,614 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:09:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:18,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:09:18,006 INFO L390 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 22 treesize of output 18 [2022-07-14 07:09:20,446 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:09:20,446 INFO L390 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 14 treesize of output 13 [2022-07-14 07:09:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 07:09:20,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:20,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169524974] [2022-07-14 07:09:20,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169524974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:09:20,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:09:20,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-07-14 07:09:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013443045] [2022-07-14 07:09:20,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:09:20,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-14 07:09:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-14 07:09:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2022-07-14 07:09:20,908 INFO L87 Difference]: Start difference. First operand 330 states and 402 transitions. Second operand has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 13 states have internal predecessors, (86), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:09:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:22,912 INFO L93 Difference]: Finished difference Result 440 states and 513 transitions. [2022-07-14 07:09:22,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 07:09:22,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 13 states have internal predecessors, (86), 4 states have call successors, (6), 5 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 48 [2022-07-14 07:09:22,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:22,915 INFO L225 Difference]: With dead ends: 440 [2022-07-14 07:09:22,915 INFO L226 Difference]: Without dead ends: 440 [2022-07-14 07:09:22,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=215, Invalid=434, Unknown=1, NotChecked=0, Total=650 [2022-07-14 07:09:22,916 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 276 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:22,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 200 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 181 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-07-14 07:09:22,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-14 07:09:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 330. [2022-07-14 07:09:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 297 states have (on average 1.2592592592592593) internal successors, (374), 313 states have internal predecessors, (374), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 394 transitions. [2022-07-14 07:09:22,922 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 394 transitions. Word has length 48 [2022-07-14 07:09:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:22,923 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 394 transitions. [2022-07-14 07:09:22,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 13 states have internal predecessors, (86), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:09:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 394 transitions. [2022-07-14 07:09:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 07:09:22,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:22,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 07:09:22,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-07-14 07:09:23,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:23,135 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:23,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2022-07-14 07:09:23,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563904014] [2022-07-14 07:09:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:23,136 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:23,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 07:09:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 07:09:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:09:23,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:09:23,420 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:23,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563904014] [2022-07-14 07:09:23,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563904014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:09:23,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:09:23,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:09:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464811011] [2022-07-14 07:09:23,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:09:23,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 07:09:23,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 07:09:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:09:23,422 INFO L87 Difference]: Start difference. First operand 330 states and 394 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, (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) [2022-07-14 07:09:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:23,525 INFO L93 Difference]: Finished difference Result 348 states and 400 transitions. [2022-07-14 07:09:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 07:09:23,526 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, (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 48 [2022-07-14 07:09:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:23,527 INFO L225 Difference]: With dead ends: 348 [2022-07-14 07:09:23,527 INFO L226 Difference]: Without dead ends: 348 [2022-07-14 07:09:23,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 07:09:23,528 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 50 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:23,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 150 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 07:09:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-14 07:09:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 329. [2022-07-14 07:09:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.2255892255892256) internal successors, (364), 312 states have internal predecessors, (364), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 384 transitions. [2022-07-14 07:09:23,534 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 384 transitions. Word has length 48 [2022-07-14 07:09:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:23,535 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 384 transitions. [2022-07-14 07:09:23,535 INFO L496 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, (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) [2022-07-14 07:09:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 384 transitions. [2022-07-14 07:09:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 07:09:23,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:23,536 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:09:23,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:23,746 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1931998324, now seen corresponding path program 1 times [2022-07-14 07:09:23,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:23,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196809512] [2022-07-14 07:09:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:23,746 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:23,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:23,748 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:23,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-14 07:09:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 07:09:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:26,746 INFO L390 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 [2022-07-14 07:09:26,908 INFO L390 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 [2022-07-14 07:09:26,914 INFO L390 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 [2022-07-14 07:09:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:09:26,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:29,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:29,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196809512] [2022-07-14 07:09:29,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196809512] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:09:29,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [188878861] [2022-07-14 07:09:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:29,332 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:09:29,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:09:29,333 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:09:29,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-07-14 07:09:29,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 07:09:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:34,432 INFO L390 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 [2022-07-14 07:09:34,508 INFO L390 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 [2022-07-14 07:09:34,514 INFO L390 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 [2022-07-14 07:09:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 07:09:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [188878861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:09:36,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:09:36,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-14 07:09:36,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044245917] [2022-07-14 07:09:36,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:09:36,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 07:09:36,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 07:09:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-14 07:09:36,805 INFO L87 Difference]: Start difference. First operand 329 states and 384 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-07-14 07:09:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:43,474 INFO L93 Difference]: Finished difference Result 352 states and 399 transitions. [2022-07-14 07:09:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:09:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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 50 [2022-07-14 07:09:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:43,476 INFO L225 Difference]: With dead ends: 352 [2022-07-14 07:09:43,476 INFO L226 Difference]: Without dead ends: 352 [2022-07-14 07:09:43,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-14 07:09:43,476 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 176 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:43,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 212 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 164 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-07-14 07:09:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-14 07:09:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 329. [2022-07-14 07:09:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 312 states have internal predecessors, (363), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 383 transitions. [2022-07-14 07:09:43,482 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 383 transitions. Word has length 50 [2022-07-14 07:09:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:43,482 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 383 transitions. [2022-07-14 07:09:43,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-07-14 07:09:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 383 transitions. [2022-07-14 07:09:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 07:09:43,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:43,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-14 07:09:43,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:43,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:43,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:43,898 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2022-07-14 07:09:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254384472] [2022-07-14 07:09:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:43,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:43,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:43,900 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:43,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-14 07:09:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-14 07:09:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:43,983 INFO L390 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 [2022-07-14 07:09:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:09:44,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 07:09:44,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:09:44,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254384472] [2022-07-14 07:09:44,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254384472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 07:09:44,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 07:09:44,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 07:09:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887393912] [2022-07-14 07:09:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 07:09:44,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 07:09:44,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:09:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 07:09:44,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 07:09:44,053 INFO L87 Difference]: Start difference. First operand 329 states and 383 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-07-14 07:09:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:09:44,230 INFO L93 Difference]: Finished difference Result 357 states and 401 transitions. [2022-07-14 07:09:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 07:09:44,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2022-07-14 07:09:44,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:09:44,232 INFO L225 Difference]: With dead ends: 357 [2022-07-14 07:09:44,232 INFO L226 Difference]: Without dead ends: 357 [2022-07-14 07:09:44,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 07:09:44,232 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 21 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 07:09:44,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 139 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 07:09:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-07-14 07:09:44,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 329. [2022-07-14 07:09:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.2087542087542087) internal successors, (359), 312 states have internal predecessors, (359), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:09:44,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 379 transitions. [2022-07-14 07:09:44,239 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 379 transitions. Word has length 49 [2022-07-14 07:09:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:09:44,239 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 379 transitions. [2022-07-14 07:09:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-07-14 07:09:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 379 transitions. [2022-07-14 07:09:44,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-14 07:09:44,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:09:44,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:09:44,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-14 07:09:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:09:44,450 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:09:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:09:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash 429224355, now seen corresponding path program 1 times [2022-07-14 07:09:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:09:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400072120] [2022-07-14 07:09:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:09:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:09:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:09:44,452 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:09:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 07:09:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:09:44,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 07:09:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:09:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:47,050 INFO L390 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 [2022-07-14 07:09:53,462 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 07:09:53,462 INFO L390 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 16 treesize of output 16 [2022-07-14 07:09:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:09:53,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-07-14 07:09:54,076 INFO L390 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 [2022-07-14 07:09:54,080 INFO L390 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 [2022-07-14 07:09:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:09:54,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:09:54,415 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-14 07:09:54,415 INFO L390 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 21 treesize of output 20 [2022-07-14 07:09:56,958 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:09:56,959 INFO L390 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 14 treesize of output 13 [2022-07-14 07:10:02,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:10:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400072120] [2022-07-14 07:10:02,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400072120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:10:02,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135677223] [2022-07-14 07:10:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:10:02,730 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:10:02,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:10:02,732 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:10:02,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-14 07:10:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:10:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 07:10:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:07,433 INFO L390 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 [2022-07-14 07:10:07,669 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 07:10:07,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-07-14 07:10:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:07,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-14 07:10:08,031 INFO L390 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 [2022-07-14 07:10:08,035 INFO L390 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 [2022-07-14 07:10:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:10:08,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:08,161 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-14 07:10:08,161 INFO L390 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 21 treesize of output 20 [2022-07-14 07:10:15,306 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:10:15,306 INFO L390 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 14 treesize of output 13 [2022-07-14 07:10:22,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135677223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:10:22,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:10:22,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 13 [2022-07-14 07:10:22,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050913037] [2022-07-14 07:10:22,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:10:22,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-14 07:10:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:10:22,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-14 07:10:22,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=529, Unknown=11, NotChecked=0, Total=650 [2022-07-14 07:10:22,945 INFO L87 Difference]: Start difference. First operand 329 states and 379 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 07:10:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:10:29,755 INFO L93 Difference]: Finished difference Result 394 states and 439 transitions. [2022-07-14 07:10:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:10:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-07-14 07:10:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:10:29,756 INFO L225 Difference]: With dead ends: 394 [2022-07-14 07:10:29,756 INFO L226 Difference]: Without dead ends: 394 [2022-07-14 07:10:29,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 124 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=254, Invalid=854, Unknown=14, NotChecked=0, Total=1122 [2022-07-14 07:10:29,757 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 242 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:10:29,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 157 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 198 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-07-14 07:10:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-14 07:10:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 329. [2022-07-14 07:10:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.2053872053872055) internal successors, (358), 312 states have internal predecessors, (358), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:10:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 378 transitions. [2022-07-14 07:10:29,763 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 378 transitions. Word has length 50 [2022-07-14 07:10:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:10:29,763 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 378 transitions. [2022-07-14 07:10:29,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 12 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 07:10:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 378 transitions. [2022-07-14 07:10:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 07:10:29,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:10:29,764 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:10:29,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-07-14 07:10:29,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-14 07:10:30,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:10:30,171 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:10:30,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:10:30,171 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-14 07:10:30,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:10:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908568557] [2022-07-14 07:10:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:10:30,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:10:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:10:30,173 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:10:30,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 07:10:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:10:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 07:10:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:10:30,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:10:30,665 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:10:30,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908568557] [2022-07-14 07:10:30,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908568557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:10:30,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:10:30,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-14 07:10:30,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148531746] [2022-07-14 07:10:30,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:10:30,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 07:10:30,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:10:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 07:10:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-14 07:10:30,666 INFO L87 Difference]: Start difference. First operand 329 states and 378 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 07:10:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:10:31,084 INFO L93 Difference]: Finished difference Result 360 states and 398 transitions. [2022-07-14 07:10:31,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 07:10:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-14 07:10:31,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:10:31,085 INFO L225 Difference]: With dead ends: 360 [2022-07-14 07:10:31,085 INFO L226 Difference]: Without dead ends: 360 [2022-07-14 07:10:31,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-14 07:10:31,086 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 220 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:10:31,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 168 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 07:10:31,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-14 07:10:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 329. [2022-07-14 07:10:31,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 297 states have (on average 1.1919191919191918) internal successors, (354), 312 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:10:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 374 transitions. [2022-07-14 07:10:31,097 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 374 transitions. Word has length 51 [2022-07-14 07:10:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:10:31,097 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 374 transitions. [2022-07-14 07:10:31,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-14 07:10:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 374 transitions. [2022-07-14 07:10:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 07:10:31,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:10:31,099 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:10:31,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-14 07:10:31,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:10:31,309 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:10:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:10:31,310 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-14 07:10:31,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:10:31,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135238046] [2022-07-14 07:10:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:10:31,310 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:10:31,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:10:31,311 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:10:31,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-14 07:10:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:10:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 07:10:31,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:10:31,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 07:10:32,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:10:32,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135238046] [2022-07-14 07:10:32,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135238046] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 07:10:32,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:10:32,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-14 07:10:32,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147159026] [2022-07-14 07:10:32,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:10:32,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 07:10:32,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:10:32,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 07:10:32,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-14 07:10:32,027 INFO L87 Difference]: Start difference. First operand 329 states and 374 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:10:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:10:32,504 INFO L93 Difference]: Finished difference Result 345 states and 385 transitions. [2022-07-14 07:10:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 07:10:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-07-14 07:10:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:10:32,506 INFO L225 Difference]: With dead ends: 345 [2022-07-14 07:10:32,506 INFO L226 Difference]: Without dead ends: 345 [2022-07-14 07:10:32,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-14 07:10:32,508 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 230 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 07:10:32,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 191 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 07:10:32,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-14 07:10:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 328. [2022-07-14 07:10:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.1750841750841752) internal successors, (349), 311 states have internal predecessors, (349), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-14 07:10:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 369 transitions. [2022-07-14 07:10:32,512 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 369 transitions. Word has length 52 [2022-07-14 07:10:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:10:32,513 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 369 transitions. [2022-07-14 07:10:32,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:10:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 369 transitions. [2022-07-14 07:10:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 07:10:32,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:10:32,513 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:10:32,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-14 07:10:32,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:10:32,723 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:10:32,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:10:32,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1335422540, now seen corresponding path program 2 times [2022-07-14 07:10:32,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:10:32,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072141595] [2022-07-14 07:10:32,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:10:32,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:10:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:10:32,726 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:10:32,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 07:10:32,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:10:32,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:10:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 07:10:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:35,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:35,433 INFO L390 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 [2022-07-14 07:10:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:10:35,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:38,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:10:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072141595] [2022-07-14 07:10:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072141595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:10:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345860454] [2022-07-14 07:10:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 07:10:38,689 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:10:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:10:38,690 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:10:38,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-14 07:10:38,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 07:10:38,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 07:10:38,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 07:10:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:41,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:41,587 INFO L390 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 [2022-07-14 07:10:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-14 07:10:41,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:44,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [345860454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:10:44,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:10:44,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-07-14 07:10:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825265066] [2022-07-14 07:10:44,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:10:44,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 07:10:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:10:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 07:10:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2022-07-14 07:10:44,406 INFO L87 Difference]: Start difference. First operand 328 states and 369 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:10:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:10:49,146 INFO L93 Difference]: Finished difference Result 348 states and 384 transitions. [2022-07-14 07:10:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 07:10:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-07-14 07:10:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:10:49,148 INFO L225 Difference]: With dead ends: 348 [2022-07-14 07:10:49,148 INFO L226 Difference]: Without dead ends: 348 [2022-07-14 07:10:49,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=155, Invalid=393, Unknown=4, NotChecked=0, Total=552 [2022-07-14 07:10:49,149 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 189 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 07:10:49,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 245 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 159 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-07-14 07:10:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-14 07:10:49,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 287. [2022-07-14 07:10:49,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 258 states have (on average 1.1705426356589148) internal successors, (302), 272 states have internal predecessors, (302), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-14 07:10:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 320 transitions. [2022-07-14 07:10:49,154 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 320 transitions. Word has length 56 [2022-07-14 07:10:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:10:49,154 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 320 transitions. [2022-07-14 07:10:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 07:10:49,155 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 320 transitions. [2022-07-14 07:10:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 07:10:49,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:10:49,156 INFO L195 NwaCegarLoop]: 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] [2022-07-14 07:10:49,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-07-14 07:10:49,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-07-14 07:10:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 07:10:49,560 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-14 07:10:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:10:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2007976587, now seen corresponding path program 1 times [2022-07-14 07:10:49,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:10:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222990880] [2022-07-14 07:10:49,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:10:49,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:10:49,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:10:49,562 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:10:49,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-14 07:10:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:10:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 07:10:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:10:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:52,067 INFO L390 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 [2022-07-14 07:10:54,315 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:10:54,316 INFO L390 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 12 treesize of output 12 [2022-07-14 07:10:54,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:10:54,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-07-14 07:10:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:10:55,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:10:55,695 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:10:55,695 INFO L390 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 14 treesize of output 13 [2022-07-14 07:10:58,150 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-14 07:10:58,151 INFO L390 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 14 treesize of output 13 [2022-07-14 07:11:02,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:11:02,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222990880] [2022-07-14 07:11:02,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222990880] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:11:02,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [812465066] [2022-07-14 07:11:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:11:02,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:11:02,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:11:02,805 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:11:02,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-07-14 07:11:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:11:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 07:11:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates...