./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 791161d1 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_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:27:47,312 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:27:47,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:27:47,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:27:47,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:27:47,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:27:47,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:27:47,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:27:47,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:27:47,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:27:47,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:27:47,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:27:47,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:27:47,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:27:47,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:27:47,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:27:47,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:27:47,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:27:47,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:27:47,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:27:47,394 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:27:47,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:27:47,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:27:47,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:27:47,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:27:47,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:27:47,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:27:47,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:27:47,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:27:47,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:27:47,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:27:47,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:27:47,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:27:47,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:27:47,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:27:47,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:27:47,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:27:47,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:27:47,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:27:47,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:27:47,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:27:47,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:27:47,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-23 05:27:47,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:27:47,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:27:47,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:27:47,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:27:47,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:27:47,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:27:47,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:27:47,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:27:47,450 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:27:47,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:27:47,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:27:47,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:27:47,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:27:47,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:27:47,452 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:27:47,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:27:47,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:27:47,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:27:47,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:27:47,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:27:47,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:27:47,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:27:47,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:27:47,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:27:47,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-23 05:27:47,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:27:47,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:27:47,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:27:47,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:27:47,731 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:27:47,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-23 05:27:47,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92723ec8f/004e0e73f29740a58254581261c6f6c2/FLAGc07ce9673 [2022-07-23 05:27:48,258 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:27:48,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-23 05:27:48,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92723ec8f/004e0e73f29740a58254581261c6f6c2/FLAGc07ce9673 [2022-07-23 05:27:48,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92723ec8f/004e0e73f29740a58254581261c6f6c2 [2022-07-23 05:27:48,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:27:48,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:27:48,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:27:48,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:27:48,290 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:27:48,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dffad9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48, skipping insertion in model container [2022-07-23 05:27:48,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:27:48,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:27:48,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:27:48,641 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:27:48,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:27:48,720 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:27:48,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48 WrapperNode [2022-07-23 05:27:48,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:27:48,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:27:48,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:27:48,722 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:27:48,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,778 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-07-23 05:27:48,781 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:27:48,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:27:48,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:27:48,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:27:48,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:27:48,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:27:48,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:27:48,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:27:48,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (1/1) ... [2022-07-23 05:27:48,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:27:48,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:48,849 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) [2022-07-23 05:27:48,859 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 [2022-07-23 05:27:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:27:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-23 05:27:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-23 05:27:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:27:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:27:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:27:49,021 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:27:49,023 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:27:49,280 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:27:49,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:27:49,286 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-23 05:27:49,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:27:49 BoogieIcfgContainer [2022-07-23 05:27:49,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:27:49,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:27:49,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:27:49,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:27:49,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:27:48" (1/3) ... [2022-07-23 05:27:49,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc70336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:27:49, skipping insertion in model container [2022-07-23 05:27:49,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:27:48" (2/3) ... [2022-07-23 05:27:49,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bc70336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:27:49, skipping insertion in model container [2022-07-23 05:27:49,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:27:49" (3/3) ... [2022-07-23 05:27:49,301 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-23 05:27:49,314 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:27:49,314 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-23 05:27:49,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:27:49,374 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@28788c1b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4a9964a0 [2022-07-23 05:27:49,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-23 05:27:49,378 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) [2022-07-23 05:27:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:27:49,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:49,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:27:49,396 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)] === [2022-07-23 05:27:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-23 05:27:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:49,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617090943] [2022-07-23 05:27:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:49,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:49,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:49,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617090943] [2022-07-23 05:27:49,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617090943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:49,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:49,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:27:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226429690] [2022-07-23 05:27:49,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:49,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:27:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:49,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:27:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:27:49,695 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) [2022-07-23 05:27:49,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:49,858 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-07-23 05:27:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:27:49,862 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 [2022-07-23 05:27:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:49,879 INFO L225 Difference]: With dead ends: 124 [2022-07-23 05:27:49,879 INFO L226 Difference]: Without dead ends: 118 [2022-07-23 05:27:49,881 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 [2022-07-23 05:27:49,884 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 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 [2022-07-23 05:27:49,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-23 05:27:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2022-07-23 05:27:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 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) [2022-07-23 05:27:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2022-07-23 05:27:49,942 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2022-07-23 05:27:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:49,942 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2022-07-23 05:27:49,942 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) [2022-07-23 05:27:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2022-07-23 05:27:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:27:49,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:49,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:27:49,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:27:49,945 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)] === [2022-07-23 05:27:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-23 05:27:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:49,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805033215] [2022-07-23 05:27:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:50,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:50,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805033215] [2022-07-23 05:27:50,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805033215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:50,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:50,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:27:50,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275535707] [2022-07-23 05:27:50,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:50,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:27:50,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:50,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:27:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:27:50,107 INFO L87 Difference]: Start difference. First operand 92 states and 123 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) [2022-07-23 05:27:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:50,244 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2022-07-23 05:27:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:27:50,244 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 [2022-07-23 05:27:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:50,251 INFO L225 Difference]: With dead ends: 221 [2022-07-23 05:27:50,251 INFO L226 Difference]: Without dead ends: 221 [2022-07-23 05:27:50,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:27:50,256 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:50,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 207 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:50,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-23 05:27:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2022-07-23 05:27:50,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 150 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-23 05:27:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2022-07-23 05:27:50,292 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2022-07-23 05:27:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:50,294 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2022-07-23 05:27:50,294 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) [2022-07-23 05:27:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2022-07-23 05:27:50,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:27:50,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:50,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:50,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:27:50,298 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)] === [2022-07-23 05:27:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-23 05:27:50,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:50,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886674482] [2022-07-23 05:27:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:50,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:50,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886674482] [2022-07-23 05:27:50,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886674482] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:50,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:50,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:27:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774177001] [2022-07-23 05:27:50,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:50,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:27:50,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:27:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:27:50,447 INFO L87 Difference]: Start difference. First operand 168 states and 261 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) [2022-07-23 05:27:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:50,600 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2022-07-23 05:27:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:27:50,601 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 [2022-07-23 05:27:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:50,604 INFO L225 Difference]: With dead ends: 244 [2022-07-23 05:27:50,604 INFO L226 Difference]: Without dead ends: 244 [2022-07-23 05:27:50,605 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 [2022-07-23 05:27:50,611 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 162 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 [2022-07-23 05:27:50,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-23 05:27:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-07-23 05:27:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 153 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-23 05:27:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2022-07-23 05:27:50,634 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2022-07-23 05:27:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:50,634 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2022-07-23 05:27:50,634 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) [2022-07-23 05:27:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2022-07-23 05:27:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:27:50,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:50,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:50,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:27:50,636 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)] === [2022-07-23 05:27:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:50,637 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-23 05:27:50,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:50,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151203510] [2022-07-23 05:27:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:50,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:50,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151203510] [2022-07-23 05:27:50,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151203510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:50,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:50,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:27:50,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737039030] [2022-07-23 05:27:50,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:50,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:27:50,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:50,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:27:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:27:50,804 INFO L87 Difference]: Start difference. First operand 171 states and 264 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) [2022-07-23 05:27:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:50,919 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2022-07-23 05:27:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:27:50,919 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 [2022-07-23 05:27:50,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:50,925 INFO L225 Difference]: With dead ends: 223 [2022-07-23 05:27:50,925 INFO L226 Difference]: Without dead ends: 223 [2022-07-23 05:27:50,925 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 [2022-07-23 05:27:50,932 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:50,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-23 05:27:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2022-07-23 05:27:50,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 153 states have internal predecessors, (217), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-23 05:27:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2022-07-23 05:27:50,948 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2022-07-23 05:27:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:50,948 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2022-07-23 05:27:50,949 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) [2022-07-23 05:27:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2022-07-23 05:27:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:27:50,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:50,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:50,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:27:50,950 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)] === [2022-07-23 05:27:50,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-23 05:27:50,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:50,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780722888] [2022-07-23 05:27:50,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:50,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:50,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:50,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780722888] [2022-07-23 05:27:50,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780722888] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:50,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:50,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:27:50,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29319026] [2022-07-23 05:27:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:50,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:27:50,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:27:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:27:50,993 INFO L87 Difference]: Start difference. First operand 171 states and 262 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) [2022-07-23 05:27:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:51,091 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2022-07-23 05:27:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:27:51,091 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 [2022-07-23 05:27:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:51,093 INFO L225 Difference]: With dead ends: 250 [2022-07-23 05:27:51,093 INFO L226 Difference]: Without dead ends: 250 [2022-07-23 05:27:51,093 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 [2022-07-23 05:27:51,094 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 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 [2022-07-23 05:27:51,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-23 05:27:51,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2022-07-23 05:27:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 188 states have internal predecessors, (267), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-23 05:27:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2022-07-23 05:27:51,117 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2022-07-23 05:27:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:51,121 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2022-07-23 05:27:51,121 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) [2022-07-23 05:27:51,121 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2022-07-23 05:27:51,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:27:51,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:51,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:27:51,122 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)] === [2022-07-23 05:27:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-23 05:27:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:51,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419556654] [2022-07-23 05:27:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:51,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419556654] [2022-07-23 05:27:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419556654] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:51,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:51,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:27:51,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922444314] [2022-07-23 05:27:51,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:51,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:27:51,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:51,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:27:51,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:27:51,201 INFO L87 Difference]: Start difference. First operand 207 states and 312 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) [2022-07-23 05:27:51,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:51,271 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2022-07-23 05:27:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:27:51,271 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 [2022-07-23 05:27:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:51,273 INFO L225 Difference]: With dead ends: 245 [2022-07-23 05:27:51,273 INFO L226 Difference]: Without dead ends: 245 [2022-07-23 05:27:51,273 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 [2022-07-23 05:27:51,274 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:51,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-23 05:27:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2022-07-23 05:27:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 198 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-23 05:27:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2022-07-23 05:27:51,283 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2022-07-23 05:27:51,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:51,283 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2022-07-23 05:27:51,284 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) [2022-07-23 05:27:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2022-07-23 05:27:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:27:51,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:51,284 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:51,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:27:51,285 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)] === [2022-07-23 05:27:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-23 05:27:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:51,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824088822] [2022-07-23 05:27:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:51,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:51,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:51,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824088822] [2022-07-23 05:27:51,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824088822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:51,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819463131] [2022-07-23 05:27:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:51,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:51,379 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) [2022-07-23 05:27:51,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:27:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:27:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:51,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:27:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:51,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819463131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:27:51,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:27:51,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-07-23 05:27:51,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642334876] [2022-07-23 05:27:51,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:27:51,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:27:51,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:27:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:27:51,799 INFO L87 Difference]: Start difference. First operand 217 states and 325 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) [2022-07-23 05:27:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:52,028 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2022-07-23 05:27:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:27:52,029 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 [2022-07-23 05:27:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:52,033 INFO L225 Difference]: With dead ends: 302 [2022-07-23 05:27:52,033 INFO L226 Difference]: Without dead ends: 302 [2022-07-23 05:27:52,034 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 [2022-07-23 05:27:52,035 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 415 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:52,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-23 05:27:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-07-23 05:27:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.4893617021276595) internal successors, (280), 210 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-07-23 05:27:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2022-07-23 05:27:52,046 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2022-07-23 05:27:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:52,047 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2022-07-23 05:27:52,047 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) [2022-07-23 05:27:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2022-07-23 05:27:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:27:52,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:52,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:52,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-23 05:27:52,263 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 [2022-07-23 05:27:52,264 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)] === [2022-07-23 05:27:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:52,264 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-23 05:27:52,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563893099] [2022-07-23 05:27:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:52,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563893099] [2022-07-23 05:27:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563893099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766856593] [2022-07-23 05:27:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:52,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:52,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:52,381 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) [2022-07-23 05:27:52,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:27:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:52,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:27:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:52,556 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 [2022-07-23 05:27:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:52,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:27:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:52,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766856593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:27:52,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:27:52,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-23 05:27:52,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178159169] [2022-07-23 05:27:52,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:27:52,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:27:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:52,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:27:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:27:52,619 INFO L87 Difference]: Start difference. First operand 229 states and 335 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) [2022-07-23 05:27:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:52,908 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2022-07-23 05:27:52,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:27:52,909 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 [2022-07-23 05:27:52,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:52,911 INFO L225 Difference]: With dead ends: 335 [2022-07-23 05:27:52,933 INFO L226 Difference]: Without dead ends: 335 [2022-07-23 05:27:52,934 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 [2022-07-23 05:27:52,934 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:52,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 411 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:27:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-23 05:27:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2022-07-23 05:27:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.482233502538071) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2022-07-23 05:27:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2022-07-23 05:27:52,946 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2022-07-23 05:27:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:52,946 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2022-07-23 05:27:52,947 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) [2022-07-23 05:27:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2022-07-23 05:27:52,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:27:52,947 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:52,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:52,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:27:53,163 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 [2022-07-23 05:27:53,164 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)] === [2022-07-23 05:27:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-23 05:27:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529749580] [2022-07-23 05:27:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529749580] [2022-07-23 05:27:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529749580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030991634] [2022-07-23 05:27:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:53,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:53,300 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) [2022-07-23 05:27:53,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:27:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:53,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:27:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:53,488 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 [2022-07-23 05:27:53,496 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 [2022-07-23 05:27:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:53,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:27:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:53,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030991634] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:27:53,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:27:53,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-07-23 05:27:53,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088018430] [2022-07-23 05:27:53,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:27:53,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:27:53,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:53,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:27:53,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:27:53,618 INFO L87 Difference]: Start difference. First operand 239 states and 349 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) [2022-07-23 05:27:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:54,198 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2022-07-23 05:27:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:27:54,199 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 [2022-07-23 05:27:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:54,201 INFO L225 Difference]: With dead ends: 570 [2022-07-23 05:27:54,201 INFO L226 Difference]: Without dead ends: 570 [2022-07-23 05:27:54,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:27:54,202 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 502 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:54,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 748 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:27:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-07-23 05:27:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2022-07-23 05:27:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.5136054421768708) internal successors, (445), 322 states have internal predecessors, (445), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2022-07-23 05:27:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-23 05:27:54,218 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2022-07-23 05:27:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:54,218 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-23 05:27:54,218 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) [2022-07-23 05:27:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-23 05:27:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:27:54,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:54,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:54,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:27:54,423 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 [2022-07-23 05:27:54,424 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)] === [2022-07-23 05:27:54,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-23 05:27:54,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:54,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950685148] [2022-07-23 05:27:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:54,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:54,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:54,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950685148] [2022-07-23 05:27:54,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950685148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:54,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:54,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:27:54,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052968632] [2022-07-23 05:27:54,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:27:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:27:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:27:54,460 INFO L87 Difference]: Start difference. First operand 347 states and 519 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) [2022-07-23 05:27:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:54,477 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2022-07-23 05:27:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:27:54,478 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 [2022-07-23 05:27:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:54,480 INFO L225 Difference]: With dead ends: 356 [2022-07-23 05:27:54,480 INFO L226 Difference]: Without dead ends: 356 [2022-07-23 05:27:54,480 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 [2022-07-23 05:27:54,480 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:54,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:27:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-23 05:27:54,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2022-07-23 05:27:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.5067567567567568) internal successors, (446), 323 states have internal predecessors, (446), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-07-23 05:27:54,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-07-23 05:27:54,491 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2022-07-23 05:27:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:54,492 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-07-23 05:27:54,492 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) [2022-07-23 05:27:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-07-23 05:27:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:27:54,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:54,493 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] [2022-07-23 05:27:54,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:27:54,493 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:27:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-23 05:27:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:54,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736274110] [2022-07-23 05:27:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:27:54,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:54,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736274110] [2022-07-23 05:27:54,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736274110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:54,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:27:54,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:27:54,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439039544] [2022-07-23 05:27:54,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:54,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:27:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:27:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:27:54,543 INFO L87 Difference]: Start difference. First operand 343 states and 495 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) [2022-07-23 05:27:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:54,599 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2022-07-23 05:27:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:27:54,600 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 [2022-07-23 05:27:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:54,602 INFO L225 Difference]: With dead ends: 263 [2022-07-23 05:27:54,602 INFO L226 Difference]: Without dead ends: 263 [2022-07-23 05:27:54,602 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 [2022-07-23 05:27:54,602 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:54,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:27:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-23 05:27:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-23 05:27:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 224 states have (on average 1.4910714285714286) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-23 05:27:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2022-07-23 05:27:54,610 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2022-07-23 05:27:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:54,610 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2022-07-23 05:27:54,610 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) [2022-07-23 05:27:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2022-07-23 05:27:54,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:27:54,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:54,611 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] [2022-07-23 05:27:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:27:54,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:27:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-23 05:27:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:54,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493325118] [2022-07-23 05:27:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:27:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:54,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:54,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493325118] [2022-07-23 05:27:54,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493325118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:54,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001427111] [2022-07-23 05:27:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:54,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:54,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:54,753 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) [2022-07-23 05:27:54,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:27:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:54,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:27:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:27:55,070 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 [2022-07-23 05:27:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:55,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:27:57,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001427111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:57,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:27:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-23 05:27:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575568291] [2022-07-23 05:27:57,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:27:57,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:27:57,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:27:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:27:57,267 INFO L87 Difference]: Start difference. First operand 263 states and 368 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) [2022-07-23 05:27:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:57,965 INFO L93 Difference]: Finished difference Result 414 states and 529 transitions. [2022-07-23 05:27:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:27:57,966 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 [2022-07-23 05:27:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:57,967 INFO L225 Difference]: With dead ends: 414 [2022-07-23 05:27:57,968 INFO L226 Difference]: Without dead ends: 414 [2022-07-23 05:27:57,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:27:57,968 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 606 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:27:57,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 322 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-23 05:27:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-23 05:27:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2022-07-23 05:27:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 279 states have (on average 1.4838709677419355) internal successors, (414), 304 states have internal predecessors, (414), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-23 05:27:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2022-07-23 05:27:57,976 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2022-07-23 05:27:57,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:57,977 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2022-07-23 05:27:57,977 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) [2022-07-23 05:27:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2022-07-23 05:27:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:27:57,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:57,978 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:27:58,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:27:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:58,202 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:27:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-23 05:27:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:58,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221626011] [2022-07-23 05:27:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:27:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:58,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:58,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221626011] [2022-07-23 05:27:58,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221626011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:58,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100731159] [2022-07-23 05:27:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:58,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:58,282 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) [2022-07-23 05:27:58,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:27:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:58,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:27:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:58,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:27:58,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100731159] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:27:58,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:27:58,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-07-23 05:27:58,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066701261] [2022-07-23 05:27:58,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:27:58,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:27:58,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:58,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:27:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:27:58,451 INFO L87 Difference]: Start difference. First operand 321 states and 450 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) [2022-07-23 05:27:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:27:58,562 INFO L93 Difference]: Finished difference Result 416 states and 561 transitions. [2022-07-23 05:27:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:27:58,562 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 [2022-07-23 05:27:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:27:58,564 INFO L225 Difference]: With dead ends: 416 [2022-07-23 05:27:58,564 INFO L226 Difference]: Without dead ends: 416 [2022-07-23 05:27:58,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:27:58,565 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 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 [2022-07-23 05:27:58,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:27:58,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-23 05:27:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 344. [2022-07-23 05:27:58,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 302 states have (on average 1.4735099337748345) internal successors, (445), 327 states have internal predecessors, (445), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-23 05:27:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-07-23 05:27:58,575 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 28 [2022-07-23 05:27:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:27:58,575 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-07-23 05:27:58,576 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) [2022-07-23 05:27:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-07-23 05:27:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:27:58,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:27:58,577 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] [2022-07-23 05:27:58,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:27:58,799 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,SelfDestructingSolverStorable12 [2022-07-23 05:27:58,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:27:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:27:58,800 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-23 05:27:58,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:27:58,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349793434] [2022-07-23 05:27:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:58,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:27:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:27:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:59,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:27:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349793434] [2022-07-23 05:27:59,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349793434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450564438] [2022-07-23 05:27:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:27:59,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:27:59,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:27:59,168 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) [2022-07-23 05:27:59,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:27:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:27:59,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 05:27:59,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:27:59,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:27:59,525 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 12 treesize of output 14 [2022-07-23 05:27:59,598 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 [2022-07-23 05:27:59,601 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 [2022-07-23 05:27:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:27:59,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:27:59,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450564438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:27:59,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:27:59,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-23 05:27:59,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141242457] [2022-07-23 05:27:59,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:27:59,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:27:59,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:27:59,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:27:59,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:27:59,751 INFO L87 Difference]: Start difference. First operand 344 states and 481 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) [2022-07-23 05:28:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:01,176 INFO L93 Difference]: Finished difference Result 554 states and 693 transitions. [2022-07-23 05:28:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:28:01,177 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 [2022-07-23 05:28:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:01,180 INFO L225 Difference]: With dead ends: 554 [2022-07-23 05:28:01,180 INFO L226 Difference]: Without dead ends: 554 [2022-07-23 05:28:01,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:28:01,181 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 691 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:01,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 505 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-07-23 05:28:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-07-23 05:28:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2022-07-23 05:28:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 356 states have (on average 1.4915730337078652) internal successors, (531), 382 states have internal predecessors, (531), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-23 05:28:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 571 transitions. [2022-07-23 05:28:01,192 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 571 transitions. Word has length 29 [2022-07-23 05:28:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:01,192 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 571 transitions. [2022-07-23 05:28:01,192 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) [2022-07-23 05:28:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 571 transitions. [2022-07-23 05:28:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:28:01,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:01,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:01,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:01,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:01,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:01,412 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-07-23 05:28:01,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:01,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049205964] [2022-07-23 05:28:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:01,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:01,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:01,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:01,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049205964] [2022-07-23 05:28:01,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049205964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:01,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177835838] [2022-07-23 05:28:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:01,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:01,487 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) [2022-07-23 05:28:01,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:28:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:28:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:01,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:01,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177835838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:01,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:01,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-23 05:28:01,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011021508] [2022-07-23 05:28:01,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:01,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:28:01,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:28:01,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:28:01,739 INFO L87 Difference]: Start difference. First operand 401 states and 571 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) [2022-07-23 05:28:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:02,003 INFO L93 Difference]: Finished difference Result 558 states and 726 transitions. [2022-07-23 05:28:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:28:02,003 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 [2022-07-23 05:28:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:02,005 INFO L225 Difference]: With dead ends: 558 [2022-07-23 05:28:02,005 INFO L226 Difference]: Without dead ends: 558 [2022-07-23 05:28:02,006 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 [2022-07-23 05:28:02,006 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 389 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:02,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 213 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-23 05:28:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2022-07-23 05:28:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 431 states have (on average 1.443155452436195) internal successors, (622), 457 states have internal predecessors, (622), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-23 05:28:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2022-07-23 05:28:02,018 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 30 [2022-07-23 05:28:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:02,018 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2022-07-23 05:28:02,019 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) [2022-07-23 05:28:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2022-07-23 05:28:02,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:28:02,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:02,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:02,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:02,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:02,245 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:02,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-07-23 05:28:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:02,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231032714] [2022-07-23 05:28:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:02,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231032714] [2022-07-23 05:28:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231032714] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843212384] [2022-07-23 05:28:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:02,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:02,324 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) [2022-07-23 05:28:02,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:28:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:02,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:28:02,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:02,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-23 05:28:02,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843212384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:02,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:02,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-23 05:28:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120767892] [2022-07-23 05:28:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:28:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:28:02,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:28:02,597 INFO L87 Difference]: Start difference. First operand 478 states and 659 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) [2022-07-23 05:28:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:02,967 INFO L93 Difference]: Finished difference Result 533 states and 692 transitions. [2022-07-23 05:28:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:28:02,967 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 [2022-07-23 05:28:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:02,970 INFO L225 Difference]: With dead ends: 533 [2022-07-23 05:28:02,970 INFO L226 Difference]: Without dead ends: 533 [2022-07-23 05:28:02,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:28:02,972 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 498 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:02,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 332 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:02,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-23 05:28:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2022-07-23 05:28:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.425629290617849) internal successors, (623), 463 states have internal predecessors, (623), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 659 transitions. [2022-07-23 05:28:02,987 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 659 transitions. Word has length 31 [2022-07-23 05:28:02,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:02,988 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 659 transitions. [2022-07-23 05:28:02,988 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) [2022-07-23 05:28:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 659 transitions. [2022-07-23 05:28:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:28:02,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:02,991 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] [2022-07-23 05:28:03,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:03,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-23 05:28:03,215 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-23 05:28:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:03,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848670507] [2022-07-23 05:28:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:03,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:03,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:03,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848670507] [2022-07-23 05:28:03,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848670507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:03,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573835662] [2022-07-23 05:28:03,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:03,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:03,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:03,393 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) [2022-07-23 05:28:03,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:28:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:03,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 05:28:03,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:03,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:03,673 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 [2022-07-23 05:28:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:03,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:03,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573835662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:03,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:03,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-23 05:28:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831194358] [2022-07-23 05:28:03,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:28:03,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:28:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:28:03,970 INFO L87 Difference]: Start difference. First operand 484 states and 659 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) [2022-07-23 05:28:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:04,743 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2022-07-23 05:28:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 05:28:04,744 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 [2022-07-23 05:28:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:04,746 INFO L225 Difference]: With dead ends: 555 [2022-07-23 05:28:04,746 INFO L226 Difference]: Without dead ends: 555 [2022-07-23 05:28:04,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:28:04,747 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:04,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 427 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 542 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-07-23 05:28:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-23 05:28:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2022-07-23 05:28:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.3958810068649885) internal successors, (610), 463 states have internal predecessors, (610), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 646 transitions. [2022-07-23 05:28:04,757 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 646 transitions. Word has length 35 [2022-07-23 05:28:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:04,757 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 646 transitions. [2022-07-23 05:28:04,758 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) [2022-07-23 05:28:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 646 transitions. [2022-07-23 05:28:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:28:04,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:04,758 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:04,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-23 05:28:04,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-23 05:28:04,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-23 05:28:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:04,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999126539] [2022-07-23 05:28:04,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:04,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999126539] [2022-07-23 05:28:05,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999126539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509637544] [2022-07-23 05:28:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:05,042 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) [2022-07-23 05:28:05,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:28:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:28:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509637544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:05,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-23 05:28:05,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333906479] [2022-07-23 05:28:05,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:05,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:05,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:05,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:05,220 INFO L87 Difference]: Start difference. First operand 484 states and 646 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:28:05,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:05,297 INFO L93 Difference]: Finished difference Result 513 states and 669 transitions. [2022-07-23 05:28:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-07-23 05:28:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:05,299 INFO L225 Difference]: With dead ends: 513 [2022-07-23 05:28:05,299 INFO L226 Difference]: Without dead ends: 513 [2022-07-23 05:28:05,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:28:05,300 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:05,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-07-23 05:28:05,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2022-07-23 05:28:05,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 437 states have (on average 1.3775743707093822) internal successors, (602), 461 states have internal predecessors, (602), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2022-07-23 05:28:05,321 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 40 [2022-07-23 05:28:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:05,321 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2022-07-23 05:28:05,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:28:05,322 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2022-07-23 05:28:05,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 05:28:05,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:05,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:05,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:05,535 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,SelfDestructingSolverStorable17 [2022-07-23 05:28:05,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-23 05:28:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:05,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340010774] [2022-07-23 05:28:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:05,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340010774] [2022-07-23 05:28:05,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340010774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139062990] [2022-07-23 05:28:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:05,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:05,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:05,595 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) [2022-07-23 05:28:05,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:28:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:28:05,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:05,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139062990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:05,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:05,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-23 05:28:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120833495] [2022-07-23 05:28:05,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:05,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:05,760 INFO L87 Difference]: Start difference. First operand 482 states and 638 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:28:05,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:05,853 INFO L93 Difference]: Finished difference Result 511 states and 661 transitions. [2022-07-23 05:28:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-07-23 05:28:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:05,856 INFO L225 Difference]: With dead ends: 511 [2022-07-23 05:28:05,856 INFO L226 Difference]: Without dead ends: 511 [2022-07-23 05:28:05,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:28:05,857 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:05,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-07-23 05:28:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 480. [2022-07-23 05:28:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 437 states have (on average 1.3592677345537758) internal successors, (594), 459 states have internal predecessors, (594), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2022-07-23 05:28:05,868 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 41 [2022-07-23 05:28:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:05,869 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2022-07-23 05:28:05,869 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:28:05,869 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2022-07-23 05:28:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 05:28:05,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:05,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:05,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-23 05:28:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:06,084 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-23 05:28:06,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:06,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270902917] [2022-07-23 05:28:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:06,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:06,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270902917] [2022-07-23 05:28:06,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270902917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677065662] [2022-07-23 05:28:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:06,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:06,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:06,176 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) [2022-07-23 05:28:06,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:28:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:28:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:06,249 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 [2022-07-23 05:28:06,283 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:28:06,283 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 [2022-07-23 05:28:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:06,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:06,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677065662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:06,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:06,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-23 05:28:06,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283224531] [2022-07-23 05:28:06,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:06,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:28:06,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:06,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:28:06,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:28:06,430 INFO L87 Difference]: Start difference. First operand 480 states and 630 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 05:28:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:06,561 INFO L93 Difference]: Finished difference Result 532 states and 675 transitions. [2022-07-23 05:28:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:28:06,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-07-23 05:28:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:06,564 INFO L225 Difference]: With dead ends: 532 [2022-07-23 05:28:06,565 INFO L226 Difference]: Without dead ends: 532 [2022-07-23 05:28:06,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:28:06,567 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:06,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-07-23 05:28:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-23 05:28:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 486. [2022-07-23 05:28:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 443 states have (on average 1.3544018058690745) internal successors, (600), 465 states have internal predecessors, (600), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2022-07-23 05:28:06,593 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 42 [2022-07-23 05:28:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:06,594 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2022-07-23 05:28:06,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 05:28:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2022-07-23 05:28:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-23 05:28:06,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:06,595 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] [2022-07-23 05:28:06,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:06,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:06,811 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1200736699, now seen corresponding path program 1 times [2022-07-23 05:28:06,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:06,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098229228] [2022-07-23 05:28:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:06,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:06,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098229228] [2022-07-23 05:28:06,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098229228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:06,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782571053] [2022-07-23 05:28:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:06,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:06,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:06,880 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) [2022-07-23 05:28:06,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:28:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:06,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:28:06,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:06,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:06,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782571053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:06,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:06,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-23 05:28:06,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128110954] [2022-07-23 05:28:06,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:06,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:06,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:28:06,979 INFO L87 Difference]: Start difference. First operand 486 states and 636 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) [2022-07-23 05:28:07,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:07,008 INFO L93 Difference]: Finished difference Result 580 states and 722 transitions. [2022-07-23 05:28:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:07,009 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 [2022-07-23 05:28:07,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:07,011 INFO L225 Difference]: With dead ends: 580 [2022-07-23 05:28:07,011 INFO L226 Difference]: Without dead ends: 580 [2022-07-23 05:28:07,011 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 [2022-07-23 05:28:07,012 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 68 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:07,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-07-23 05:28:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 476. [2022-07-23 05:28:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 433 states have (on average 1.327944572748268) internal successors, (575), 455 states have internal predecessors, (575), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:28:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2022-07-23 05:28:07,027 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 45 [2022-07-23 05:28:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:07,027 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2022-07-23 05:28:07,028 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) [2022-07-23 05:28:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2022-07-23 05:28:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:28:07,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:07,029 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] [2022-07-23 05:28:07,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:07,251 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,SelfDestructingSolverStorable20 [2022-07-23 05:28:07,252 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-23 05:28:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:07,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209393878] [2022-07-23 05:28:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:07,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:07,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:07,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 05:28:07,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209393878] [2022-07-23 05:28:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209393878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828950793] [2022-07-23 05:28:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:07,406 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) [2022-07-23 05:28:07,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:28:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:28:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:07,824 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 [2022-07-23 05:28:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:07,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:12,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828950793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:12,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:12,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-23 05:28:12,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750509696] [2022-07-23 05:28:12,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:28:12,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:12,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:28:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:28:12,045 INFO L87 Difference]: Start difference. First operand 476 states and 611 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) [2022-07-23 05:28:12,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:12,570 INFO L93 Difference]: Finished difference Result 573 states and 691 transitions. [2022-07-23 05:28:12,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:28:12,570 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 [2022-07-23 05:28:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:12,573 INFO L225 Difference]: With dead ends: 573 [2022-07-23 05:28:12,573 INFO L226 Difference]: Without dead ends: 573 [2022-07-23 05:28:12,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:28:12,574 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 454 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 422 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 352 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-07-23 05:28:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-23 05:28:12,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 480. [2022-07-23 05:28:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 438 states have (on average 1.321917808219178) internal successors, (579), 459 states have internal predecessors, (579), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-23 05:28:12,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 613 transitions. [2022-07-23 05:28:12,585 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 613 transitions. Word has length 48 [2022-07-23 05:28:12,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:12,585 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 613 transitions. [2022-07-23 05:28:12,585 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) [2022-07-23 05:28:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 613 transitions. [2022-07-23 05:28:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:28:12,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:12,586 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] [2022-07-23 05:28:12,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:12,810 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-23 05:28:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:12,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129668942] [2022-07-23 05:28:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:12,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:12,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:12,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129668942] [2022-07-23 05:28:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129668942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224026801] [2022-07-23 05:28:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:12,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:12,860 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) [2022-07-23 05:28:12,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:28:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:28:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 05:28:12,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:12,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224026801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:12,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:12,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-23 05:28:12,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323861451] [2022-07-23 05:28:12,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:12,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:12,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:12,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:12,961 INFO L87 Difference]: Start difference. First operand 480 states and 613 transitions. Second operand has 3 states, 2 states have (on average 13.0) 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) [2022-07-23 05:28:12,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:12,965 INFO L93 Difference]: Finished difference Result 506 states and 634 transitions. [2022-07-23 05:28:12,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:12,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) 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 [2022-07-23 05:28:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:12,968 INFO L225 Difference]: With dead ends: 506 [2022-07-23 05:28:12,968 INFO L226 Difference]: Without dead ends: 506 [2022-07-23 05:28:12,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:12,969 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:12,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-23 05:28:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 479. [2022-07-23 05:28:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 438 states have (on average 1.3082191780821917) internal successors, (573), 458 states have internal predecessors, (573), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-23 05:28:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 607 transitions. [2022-07-23 05:28:12,978 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 607 transitions. Word has length 47 [2022-07-23 05:28:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:12,979 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 607 transitions. [2022-07-23 05:28:12,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) 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) [2022-07-23 05:28:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 607 transitions. [2022-07-23 05:28:12,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:28:12,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:12,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:13,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:13,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:13,197 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)] === [2022-07-23 05:28:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2022-07-23 05:28:13,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:13,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725562268] [2022-07-23 05:28:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:13,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:13,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725562268] [2022-07-23 05:28:13,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725562268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:13,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265897091] [2022-07-23 05:28:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:13,331 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) [2022-07-23 05:28:13,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:28:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:28:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:13,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:13,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265897091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:13,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:13,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-07-23 05:28:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570738141] [2022-07-23 05:28:13,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:13,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:28:13,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:13,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:28:13,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:28:13,547 INFO L87 Difference]: Start difference. First operand 479 states and 607 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 05:28:13,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:13,770 INFO L93 Difference]: Finished difference Result 399 states and 478 transitions. [2022-07-23 05:28:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:28:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-07-23 05:28:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:13,772 INFO L225 Difference]: With dead ends: 399 [2022-07-23 05:28:13,772 INFO L226 Difference]: Without dead ends: 399 [2022-07-23 05:28:13,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:28:13,773 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 239 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:13,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-23 05:28:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 368. [2022-07-23 05:28:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 334 states have (on average 1.2754491017964071) internal successors, (426), 351 states have internal predecessors, (426), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:28:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 450 transitions. [2022-07-23 05:28:13,780 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 450 transitions. Word has length 48 [2022-07-23 05:28:13,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:13,780 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 450 transitions. [2022-07-23 05:28:13,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 05:28:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 450 transitions. [2022-07-23 05:28:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:28:13,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:13,781 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] [2022-07-23 05:28:13,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:13,981 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,SelfDestructingSolverStorable23 [2022-07-23 05:28:13,982 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2022-07-23 05:28:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62827745] [2022-07-23 05:28:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:13,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:14,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62827745] [2022-07-23 05:28:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62827745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201625975] [2022-07-23 05:28:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:14,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:14,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:14,028 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) [2022-07-23 05:28:14,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:28:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:28:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 05:28:14,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:14,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201625975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:14,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:14,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2022-07-23 05:28:14,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273342232] [2022-07-23 05:28:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:28:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:28:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:28:14,159 INFO L87 Difference]: Start difference. First operand 368 states and 450 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-23 05:28:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:14,183 INFO L93 Difference]: Finished difference Result 384 states and 462 transitions. [2022-07-23 05:28:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:28:14,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 48 [2022-07-23 05:28:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:14,185 INFO L225 Difference]: With dead ends: 384 [2022-07-23 05:28:14,185 INFO L226 Difference]: Without dead ends: 384 [2022-07-23 05:28:14,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:28:14,185 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:14,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 92 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-23 05:28:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 367. [2022-07-23 05:28:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 334 states have (on average 1.2604790419161678) internal successors, (421), 350 states have internal predecessors, (421), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:28:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 445 transitions. [2022-07-23 05:28:14,192 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 445 transitions. Word has length 48 [2022-07-23 05:28:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:14,193 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 445 transitions. [2022-07-23 05:28:14,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-07-23 05:28:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 445 transitions. [2022-07-23 05:28:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:28:14,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:14,200 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] [2022-07-23 05:28:14,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:14,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:14,411 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:14,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-23 05:28:14,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:14,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104202075] [2022-07-23 05:28:14,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:14,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-23 05:28:14,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104202075] [2022-07-23 05:28:14,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104202075] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:14,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103482289] [2022-07-23 05:28:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:14,776 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) [2022-07-23 05:28:14,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:28:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:28:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:15,303 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 [2022-07-23 05:28:15,381 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 [2022-07-23 05:28:15,384 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 [2022-07-23 05:28:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:15,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:15,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103482289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:15,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:15,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-23 05:28:15,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932881705] [2022-07-23 05:28:15,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:15,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:28:15,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:28:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:28:15,550 INFO L87 Difference]: Start difference. First operand 367 states and 445 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) [2022-07-23 05:28:16,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:16,479 INFO L93 Difference]: Finished difference Result 418 states and 477 transitions. [2022-07-23 05:28:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 05:28:16,480 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 [2022-07-23 05:28:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:16,482 INFO L225 Difference]: With dead ends: 418 [2022-07-23 05:28:16,482 INFO L226 Difference]: Without dead ends: 418 [2022-07-23 05:28:16,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:28:16,483 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 401 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:16,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 395 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 483 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-23 05:28:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-23 05:28:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 366. [2022-07-23 05:28:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 349 states have internal predecessors, (420), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 442 transitions. [2022-07-23 05:28:16,490 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 442 transitions. Word has length 50 [2022-07-23 05:28:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:16,491 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 442 transitions. [2022-07-23 05:28:16,491 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) [2022-07-23 05:28:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 442 transitions. [2022-07-23 05:28:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-23 05:28:16,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:16,492 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] [2022-07-23 05:28:16,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:16,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2022-07-23 05:28:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796803927] [2022-07-23 05:28:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:16,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796803927] [2022-07-23 05:28:16,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796803927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149376581] [2022-07-23 05:28:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:16,761 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) [2022-07-23 05:28:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:28:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:28:16,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 05:28:16,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:16,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149376581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:16,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:16,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-23 05:28:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97987071] [2022-07-23 05:28:16,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:16,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:16,842 INFO L87 Difference]: Start difference. First operand 366 states and 442 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-07-23 05:28:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:16,850 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2022-07-23 05:28:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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 49 [2022-07-23 05:28:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:16,852 INFO L225 Difference]: With dead ends: 384 [2022-07-23 05:28:16,852 INFO L226 Difference]: Without dead ends: 384 [2022-07-23 05:28:16,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:16,853 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:16,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-23 05:28:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2022-07-23 05:28:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2425149700598803) internal successors, (415), 348 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2022-07-23 05:28:16,871 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 49 [2022-07-23 05:28:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:16,871 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2022-07-23 05:28:16,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-07-23 05:28:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2022-07-23 05:28:16,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:28:16,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:16,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:16,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:17,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:17,096 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-23 05:28:17,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:17,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133989145] [2022-07-23 05:28:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:17,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:17,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:17,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133989145] [2022-07-23 05:28:17,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133989145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:17,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314064483] [2022-07-23 05:28:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:17,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:17,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:17,175 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) [2022-07-23 05:28:17,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:28:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:28:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:17,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:17,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314064483] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:17,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:17,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-23 05:28:17,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496505133] [2022-07-23 05:28:17,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:17,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:28:17,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:17,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:28:17,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:28:17,453 INFO L87 Difference]: Start difference. First operand 365 states and 437 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) [2022-07-23 05:28:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:17,713 INFO L93 Difference]: Finished difference Result 402 states and 463 transitions. [2022-07-23 05:28:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:28:17,714 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 [2022-07-23 05:28:17,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:17,715 INFO L225 Difference]: With dead ends: 402 [2022-07-23 05:28:17,715 INFO L226 Difference]: Without dead ends: 402 [2022-07-23 05:28:17,715 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 [2022-07-23 05:28:17,716 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 265 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:17,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 193 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:17,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-23 05:28:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 365. [2022-07-23 05:28:17,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2335329341317365) internal successors, (412), 348 states have internal predecessors, (412), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 434 transitions. [2022-07-23 05:28:17,722 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 434 transitions. Word has length 51 [2022-07-23 05:28:17,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:17,723 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 434 transitions. [2022-07-23 05:28:17,723 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) [2022-07-23 05:28:17,723 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 434 transitions. [2022-07-23 05:28:17,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:28:17,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:17,724 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, 1, 1, 1] [2022-07-23 05:28:17,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:17,937 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,SelfDestructingSolverStorable27 [2022-07-23 05:28:17,937 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:17,937 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-23 05:28:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437424597] [2022-07-23 05:28:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:17,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:18,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:18,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:18,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437424597] [2022-07-23 05:28:18,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437424597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:18,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143866619] [2022-07-23 05:28:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:18,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:18,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:18,104 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) [2022-07-23 05:28:18,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:28:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-23 05:28:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:18,272 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:28:18,273 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 [2022-07-23 05:28:18,391 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:28:18,392 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 [2022-07-23 05:28:18,438 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:28:18,440 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 [2022-07-23 05:28:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:18,554 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:28:18,555 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 56 treesize of output 53 [2022-07-23 05:28:18,706 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:28:18,706 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 110 treesize of output 105 [2022-07-23 05:28:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:18,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143866619] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:18,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:18,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 26 [2022-07-23 05:28:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798622867] [2022-07-23 05:28:18,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 05:28:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 05:28:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:28:18,866 INFO L87 Difference]: Start difference. First operand 365 states and 434 transitions. Second operand has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 05:28:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:19,120 INFO L93 Difference]: Finished difference Result 393 states and 460 transitions. [2022-07-23 05:28:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:28:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2022-07-23 05:28:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:19,122 INFO L225 Difference]: With dead ends: 393 [2022-07-23 05:28:19,122 INFO L226 Difference]: Without dead ends: 393 [2022-07-23 05:28:19,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:28:19,123 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 416 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:19,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 96 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 184 Invalid, 0 Unknown, 11 Unchecked, 0.1s Time] [2022-07-23 05:28:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-23 05:28:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 365. [2022-07-23 05:28:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2305389221556886) internal successors, (411), 348 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 433 transitions. [2022-07-23 05:28:19,130 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 433 transitions. Word has length 51 [2022-07-23 05:28:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:19,131 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 433 transitions. [2022-07-23 05:28:19,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-23 05:28:19,131 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 433 transitions. [2022-07-23 05:28:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:28:19,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:19,132 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, 1, 1, 1] [2022-07-23 05:28:19,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-23 05:28:19,355 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-23 05:28:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:19,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506927966] [2022-07-23 05:28:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:19,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:19,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:19,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506927966] [2022-07-23 05:28:19,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506927966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477739091] [2022-07-23 05:28:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:19,508 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) [2022-07-23 05:28:19,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:28:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:28:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:19,683 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 [2022-07-23 05:28:19,691 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:28:19,691 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 [2022-07-23 05:28:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:19,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477739091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:19,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:19,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-07-23 05:28:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951403727] [2022-07-23 05:28:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:28:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:28:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:28:19,748 INFO L87 Difference]: Start difference. First operand 365 states and 433 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 05:28:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:19,891 INFO L93 Difference]: Finished difference Result 443 states and 508 transitions. [2022-07-23 05:28:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:28:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-07-23 05:28:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:19,893 INFO L225 Difference]: With dead ends: 443 [2022-07-23 05:28:19,893 INFO L226 Difference]: Without dead ends: 443 [2022-07-23 05:28:19,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:28:19,894 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 233 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:19,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 80 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-23 05:28:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 365. [2022-07-23 05:28:19,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.221556886227545) internal successors, (408), 348 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 430 transitions. [2022-07-23 05:28:19,901 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 430 transitions. Word has length 51 [2022-07-23 05:28:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:19,902 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 430 transitions. [2022-07-23 05:28:19,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 05:28:19,902 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 430 transitions. [2022-07-23 05:28:19,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:28:19,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:19,903 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:19,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-23 05:28:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:20,127 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:20,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-23 05:28:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:20,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455656105] [2022-07-23 05:28:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:20,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:20,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:20,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455656105] [2022-07-23 05:28:20,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455656105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023803266] [2022-07-23 05:28:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:20,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:20,203 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) [2022-07-23 05:28:20,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:28:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 05:28:20,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:28:20,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023803266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:20,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:20,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-23 05:28:20,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692522145] [2022-07-23 05:28:20,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:20,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:28:20,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:28:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:28:20,562 INFO L87 Difference]: Start difference. First operand 365 states and 430 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) [2022-07-23 05:28:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:20,900 INFO L93 Difference]: Finished difference Result 396 states and 455 transitions. [2022-07-23 05:28:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:28:20,901 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 [2022-07-23 05:28:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:20,902 INFO L225 Difference]: With dead ends: 396 [2022-07-23 05:28:20,902 INFO L226 Difference]: Without dead ends: 396 [2022-07-23 05:28:20,902 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 [2022-07-23 05:28:20,902 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 343 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:20,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-23 05:28:20,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 364. [2022-07-23 05:28:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2065868263473054) internal successors, (403), 347 states have internal predecessors, (403), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 425 transitions. [2022-07-23 05:28:20,909 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 425 transitions. Word has length 52 [2022-07-23 05:28:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:20,909 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 425 transitions. [2022-07-23 05:28:20,909 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) [2022-07-23 05:28:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 425 transitions. [2022-07-23 05:28:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:28:20,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:20,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:20,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:21,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:21,133 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:21,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:21,134 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-23 05:28:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:21,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506792858] [2022-07-23 05:28:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:21,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:21,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506792858] [2022-07-23 05:28:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506792858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646603333] [2022-07-23 05:28:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:21,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:21,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:21,609 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) [2022-07-23 05:28:21,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:28:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:28:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:21,860 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:28:21,861 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 [2022-07-23 05:28:22,079 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-23 05:28:22,079 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 21 treesize of output 29 [2022-07-23 05:28:22,125 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-23 05:28:22,126 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 [2022-07-23 05:28:22,261 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 [2022-07-23 05:28:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:22,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:22,372 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 05:28:22,372 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 178 treesize of output 165 [2022-07-23 05:28:22,630 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-23 05:28:22,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2022-07-23 05:28:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:22,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646603333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:22,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:22,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2022-07-23 05:28:22,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542949690] [2022-07-23 05:28:22,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:28:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:28:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:28:22,936 INFO L87 Difference]: Start difference. First operand 364 states and 425 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:28:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:23,716 INFO L93 Difference]: Finished difference Result 451 states and 511 transitions. [2022-07-23 05:28:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:28:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-07-23 05:28:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:23,718 INFO L225 Difference]: With dead ends: 451 [2022-07-23 05:28:23,718 INFO L226 Difference]: Without dead ends: 451 [2022-07-23 05:28:23,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2022-07-23 05:28:23,720 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:23,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 253 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 726 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-07-23 05:28:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-23 05:28:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 364. [2022-07-23 05:28:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 347 states have internal predecessors, (402), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-23 05:28:23,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 424 transitions. [2022-07-23 05:28:23,726 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 424 transitions. Word has length 52 [2022-07-23 05:28:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:23,727 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 424 transitions. [2022-07-23 05:28:23,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:28:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 424 transitions. [2022-07-23 05:28:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:28:23,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:23,728 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, 1, 1, 1] [2022-07-23 05:28:23,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:23,951 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2022-07-23 05:28:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392188338] [2022-07-23 05:28:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:23,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:23,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392188338] [2022-07-23 05:28:23,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392188338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:23,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186055031] [2022-07-23 05:28:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:23,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:23,993 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) [2022-07-23 05:28:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:28:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:24,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:28:24,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 05:28:24,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:24,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186055031] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:24,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:28:24,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-23 05:28:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242161216] [2022-07-23 05:28:24,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:28:24,076 INFO L87 Difference]: Start difference. First operand 364 states and 424 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-07-23 05:28:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:24,079 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2022-07-23 05:28:24,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:24,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 52 [2022-07-23 05:28:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:24,081 INFO L225 Difference]: With dead ends: 306 [2022-07-23 05:28:24,081 INFO L226 Difference]: Without dead ends: 306 [2022-07-23 05:28:24,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:28:24,081 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 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 [2022-07-23 05:28:24,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-23 05:28:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2022-07-23 05:28:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.178030303030303) internal successors, (311), 274 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-23 05:28:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2022-07-23 05:28:24,086 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 52 [2022-07-23 05:28:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:24,086 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2022-07-23 05:28:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-07-23 05:28:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2022-07-23 05:28:24,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:28:24,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:24,087 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, 1, 1, 1] [2022-07-23 05:28:24,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:24,303 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,SelfDestructingSolverStorable32 [2022-07-23 05:28:24,303 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:24,304 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-23 05:28:24,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:24,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230736836] [2022-07-23 05:28:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:24,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:24,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:24,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:24,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:24,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230736836] [2022-07-23 05:28:24,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230736836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37557993] [2022-07-23 05:28:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:24,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:24,835 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) [2022-07-23 05:28:24,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:28:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:24,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:28:24,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:25,161 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 05:28:25,162 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 [2022-07-23 05:28:25,166 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 [2022-07-23 05:28:25,287 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 [2022-07-23 05:28:25,290 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 [2022-07-23 05:28:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:25,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:25,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:28:25,418 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 31 treesize of output 19 [2022-07-23 05:28:25,422 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 10 treesize of output 6 [2022-07-23 05:28:25,649 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:28:25,649 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 43 treesize of output 47 [2022-07-23 05:28:25,741 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-23 05:28:25,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 49 [2022-07-23 05:28:25,780 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-23 05:28:25,780 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 [2022-07-23 05:28:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:25,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37557993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:25,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:28:25,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 10] total 35 [2022-07-23 05:28:25,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532958163] [2022-07-23 05:28:25,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:25,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-23 05:28:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-23 05:28:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:28:25,815 INFO L87 Difference]: Start difference. First operand 289 states and 329 transitions. Second operand has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 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) [2022-07-23 05:28:26,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:26,714 INFO L93 Difference]: Finished difference Result 353 states and 392 transitions. [2022-07-23 05:28:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:28:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 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 53 [2022-07-23 05:28:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:26,716 INFO L225 Difference]: With dead ends: 353 [2022-07-23 05:28:26,716 INFO L226 Difference]: Without dead ends: 353 [2022-07-23 05:28:26,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-07-23 05:28:26,717 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 458 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:26,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 155 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 431 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-07-23 05:28:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-23 05:28:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 289. [2022-07-23 05:28:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-23 05:28:26,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2022-07-23 05:28:26,722 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 53 [2022-07-23 05:28:26,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:26,722 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2022-07-23 05:28:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 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) [2022-07-23 05:28:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2022-07-23 05:28:26,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:28:26,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:26,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:26,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:26,946 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,SelfDestructingSolverStorable33 [2022-07-23 05:28:26,947 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:26,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-23 05:28:26,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:26,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100093977] [2022-07-23 05:28:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:27,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:28:27,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100093977] [2022-07-23 05:28:27,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100093977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:27,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46800628] [2022-07-23 05:28:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:27,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:27,164 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) [2022-07-23 05:28:27,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:28:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:27,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 05:28:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:27,348 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:28:27,350 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 [2022-07-23 05:28:27,470 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-23 05:28:27,470 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 2 case distinctions, treesize of input 15 treesize of output 23 [2022-07-23 05:28:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:27,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46800628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:27,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:27,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-07-23 05:28:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223452619] [2022-07-23 05:28:27,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:28:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:28:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:28:27,795 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:28:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:28,309 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2022-07-23 05:28:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:28:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-07-23 05:28:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:28,311 INFO L225 Difference]: With dead ends: 307 [2022-07-23 05:28:28,311 INFO L226 Difference]: Without dead ends: 307 [2022-07-23 05:28:28,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:28:28,312 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 336 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:28,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 264 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-07-23 05:28:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-23 05:28:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 288. [2022-07-23 05:28:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 273 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-23 05:28:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2022-07-23 05:28:28,316 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 54 [2022-07-23 05:28:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:28,317 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2022-07-23 05:28:28,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:28:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2022-07-23 05:28:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:28:28,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:28,318 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] [2022-07-23 05:28:28,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:28,518 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,SelfDestructingSolverStorable34 [2022-07-23 05:28:28,518 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2022-07-23 05:28:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:28,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562091030] [2022-07-23 05:28:28,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:28,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:28,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:28,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-23 05:28:28,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:28:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562091030] [2022-07-23 05:28:28,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562091030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901570552] [2022-07-23 05:28:28,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:28:28,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:28,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:28,680 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) [2022-07-23 05:28:28,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:28:28,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:28:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:28:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 05:28:28,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:29,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:29,056 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 [2022-07-23 05:28:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:28:29,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:29,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901570552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:29,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:29,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-23 05:28:29,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494477379] [2022-07-23 05:28:29,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:28:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:28:29,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:28:29,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:28:29,352 INFO L87 Difference]: Start difference. First operand 288 states and 327 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) [2022-07-23 05:28:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:29,850 INFO L93 Difference]: Finished difference Result 312 states and 347 transitions. [2022-07-23 05:28:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:28:29,851 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 [2022-07-23 05:28:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:29,852 INFO L225 Difference]: With dead ends: 312 [2022-07-23 05:28:29,852 INFO L226 Difference]: Without dead ends: 312 [2022-07-23 05:28:29,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:28:29,853 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:29,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 261 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 359 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-23 05:28:29,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-23 05:28:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 288. [2022-07-23 05:28:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1590909090909092) internal successors, (306), 273 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-23 05:28:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-07-23 05:28:29,858 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 56 [2022-07-23 05:28:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:29,858 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-07-23 05:28:29,858 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) [2022-07-23 05:28:29,858 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-07-23 05:28:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-23 05:28:29,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:29,859 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, 1, 1, 1] [2022-07-23 05:28:29,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:30,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:28:30,083 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:30,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2022-07-23 05:28:30,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:28:30,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047618694] [2022-07-23 05:28:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:30,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:28:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:28:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:30,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:28:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:30,347 ERROR L253 erpolLogProxyWrapper]: Interpolant 12 not inductive [2022-07-23 05:28:30,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-23 05:28:30,351 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:879) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:803) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-23 05:28:30,355 INFO L158 Benchmark]: Toolchain (without parser) took 42069.42ms. Allocated memory was 102.8MB in the beginning and 207.6MB in the end (delta: 104.9MB). Free memory was 66.7MB in the beginning and 146.1MB in the end (delta: -79.4MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,356 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 72.5MB in the beginning and 72.4MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 05:28:30,356 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.84ms. Allocated memory is still 102.8MB. Free memory was 66.4MB in the beginning and 68.5MB in the end (delta: -2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,356 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.55ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 65.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,356 INFO L158 Benchmark]: Boogie Preprocessor took 34.93ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 64.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,356 INFO L158 Benchmark]: RCFGBuilder took 475.19ms. Allocated memory is still 102.8MB. Free memory was 64.2MB in the beginning and 50.7MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,357 INFO L158 Benchmark]: TraceAbstraction took 41059.79ms. Allocated memory was 102.8MB in the beginning and 207.6MB in the end (delta: 104.9MB). Free memory was 50.1MB in the beginning and 146.1MB in the end (delta: -96.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-23 05:28:30,358 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 102.8MB. Free memory was 72.5MB in the beginning and 72.4MB in the end (delta: 25.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.84ms. Allocated memory is still 102.8MB. Free memory was 66.4MB in the beginning and 68.5MB in the end (delta: -2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.55ms. Allocated memory is still 102.8MB. Free memory was 68.5MB in the beginning and 65.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.93ms. Allocated memory is still 102.8MB. Free memory was 65.9MB in the beginning and 64.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 475.19ms. Allocated memory is still 102.8MB. Free memory was 64.2MB in the beginning and 50.7MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 41059.79ms. Allocated memory was 102.8MB in the beginning and 207.6MB in the end (delta: 104.9MB). Free memory was 50.1MB in the beginning and 146.1MB in the end (delta: -96.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-23 05:28:30,378 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_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:28:32,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:28:32,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:28:32,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:28:32,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:28:32,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:28:32,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:28:32,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:28:32,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:28:32,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:28:32,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:28:32,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:28:32,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:28:32,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:28:32,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:28:32,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:28:32,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:28:32,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:28:32,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:28:32,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:28:32,425 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:28:32,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:28:32,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:28:32,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:28:32,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:28:32,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:28:32,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:28:32,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:28:32,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:28:32,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:28:32,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:28:32,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:28:32,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:28:32,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:28:32,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:28:32,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:28:32,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:28:32,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:28:32,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:28:32,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:28:32,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:28:32,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:28:32,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-07-23 05:28:32,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:28:32,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:28:32,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:28:32,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:28:32,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:28:32,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:28:32,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:28:32,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:28:32,483 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:28:32,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:28:32,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:28:32,484 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:28:32,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:28:32,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:28:32,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:28:32,485 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:28:32,485 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:28:32,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:28:32,485 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:28:32,485 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 05:28:32,486 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 05:28:32,486 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:28:32,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:28:32,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:28:32,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:28:32,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:28:32,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:28:32,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:28:32,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:28:32,487 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 05:28:32,488 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 05:28:32,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 05:28:32,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-23 05:28:32,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:28:32,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:28:32,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:28:32,825 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:28:32,826 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:28:32,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-23 05:28:32,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f61bbf1c/76dfb0fb865548a5ab8ccde4e65fc058/FLAG45649863d [2022-07-23 05:28:33,424 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:28:33,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-23 05:28:33,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f61bbf1c/76dfb0fb865548a5ab8ccde4e65fc058/FLAG45649863d [2022-07-23 05:28:33,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f61bbf1c/76dfb0fb865548a5ab8ccde4e65fc058 [2022-07-23 05:28:33,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:28:33,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:28:33,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:28:33,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:28:33,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:28:33,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:28:33" (1/1) ... [2022-07-23 05:28:33,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f30fdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:33, skipping insertion in model container [2022-07-23 05:28:33,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:28:33" (1/1) ... [2022-07-23 05:28:33,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:28:33,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:28:34,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:28:34,310 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:28:34,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:28:34,387 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:28:34,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34 WrapperNode [2022-07-23 05:28:34,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:28:34,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:28:34,392 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:28:34,392 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:28:34,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,441 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-07-23 05:28:34,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:28:34,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:28:34,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:28:34,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:28:34,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,490 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:28:34,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:28:34,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:28:34,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:28:34,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (1/1) ... [2022-07-23 05:28:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:28:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:28:34,536 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) [2022-07-23 05:28:34,548 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 [2022-07-23 05:28:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-23 05:28:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-23 05:28:34,569 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-23 05:28:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:28:34,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:28:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:28:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:28:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 05:28:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 05:28:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:28:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:28:34,661 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:28:34,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:28:35,021 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:28:35,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:28:35,027 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-23 05:28:35,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:28:35 BoogieIcfgContainer [2022-07-23 05:28:35,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:28:35,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:28:35,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:28:35,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:28:35,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:28:33" (1/3) ... [2022-07-23 05:28:35,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531f3fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:28:35, skipping insertion in model container [2022-07-23 05:28:35,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:28:34" (2/3) ... [2022-07-23 05:28:35,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@531f3fd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:28:35, skipping insertion in model container [2022-07-23 05:28:35,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:28:35" (3/3) ... [2022-07-23 05:28:35,034 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-23 05:28:35,062 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:28:35,063 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-23 05:28:35,114 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:28:35,124 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@436880b2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3393cd1d [2022-07-23 05:28:35,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-23 05:28:35,130 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) [2022-07-23 05:28:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:28:35,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:35,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:28:35,138 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)] === [2022-07-23 05:28:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-23 05:28:35,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:35,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577600746] [2022-07-23 05:28:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:35,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:35,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:35,163 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) [2022-07-23 05:28:35,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 05:28:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:28:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:35,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:35,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:35,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577600746] [2022-07-23 05:28:35,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577600746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:35,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:35,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-23 05:28:35,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206244238] [2022-07-23 05:28:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:35,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:35,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:35,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:35,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:28:35,438 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) [2022-07-23 05:28:35,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:35,609 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-07-23 05:28:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:35,613 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 [2022-07-23 05:28:35,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:35,621 INFO L225 Difference]: With dead ends: 110 [2022-07-23 05:28:35,623 INFO L226 Difference]: Without dead ends: 106 [2022-07-23 05:28:35,625 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 [2022-07-23 05:28:35,629 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:35,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-23 05:28:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-07-23 05:28:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 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) [2022-07-23 05:28:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-23 05:28:35,665 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-07-23 05:28:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:35,666 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-23 05:28:35,666 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) [2022-07-23 05:28:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-23 05:28:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:28:35,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:35,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:28:35,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:35,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:35,876 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)] === [2022-07-23 05:28:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:35,877 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-23 05:28:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:35,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121876827] [2022-07-23 05:28:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:35,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:35,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:35,879 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) [2022-07-23 05:28:35,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 05:28:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:28:35,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:35,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:35,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:35,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121876827] [2022-07-23 05:28:35,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121876827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:35,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:35,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:28:35,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127975704] [2022-07-23 05:28:35,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:35,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:28:35,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:35,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:28:35,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:28:35,999 INFO L87 Difference]: Start difference. First operand 84 states and 110 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) [2022-07-23 05:28:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:36,181 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-07-23 05:28:36,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:28:36,182 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 [2022-07-23 05:28:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:36,184 INFO L225 Difference]: With dead ends: 206 [2022-07-23 05:28:36,185 INFO L226 Difference]: Without dead ends: 206 [2022-07-23 05:28:36,185 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 [2022-07-23 05:28:36,186 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 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 [2022-07-23 05:28:36,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-23 05:28:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-07-23 05:28:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-23 05:28:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-07-23 05:28:36,207 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-07-23 05:28:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:36,207 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-07-23 05:28:36,207 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) [2022-07-23 05:28:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-07-23 05:28:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:28:36,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:36,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:36,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-23 05:28:36,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:36,417 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)] === [2022-07-23 05:28:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-23 05:28:36,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:36,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177124716] [2022-07-23 05:28:36,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:36,421 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) [2022-07-23 05:28:36,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 05:28:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:28:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:36,567 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 [2022-07-23 05:28:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:36,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:36,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:36,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177124716] [2022-07-23 05:28:36,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177124716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:36,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:36,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:28:36,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333082290] [2022-07-23 05:28:36,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:36,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:36,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:36,580 INFO L87 Difference]: Start difference. First operand 152 states and 238 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) [2022-07-23 05:28:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:36,846 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-07-23 05:28:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:36,847 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 [2022-07-23 05:28:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:36,849 INFO L225 Difference]: With dead ends: 228 [2022-07-23 05:28:36,849 INFO L226 Difference]: Without dead ends: 228 [2022-07-23 05:28:36,850 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 [2022-07-23 05:28:36,851 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 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 [2022-07-23 05:28:36,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-23 05:28:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-07-23 05:28:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-23 05:28:36,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-07-23 05:28:36,867 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-07-23 05:28:36,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:36,868 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-07-23 05:28:36,868 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) [2022-07-23 05:28:36,868 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-07-23 05:28:36,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-23 05:28:36,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:36,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:36,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:37,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:37,078 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)] === [2022-07-23 05:28:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-23 05:28:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211777778] [2022-07-23 05:28:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:37,082 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) [2022-07-23 05:28:37,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 05:28:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:28:37,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:37,258 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 [2022-07-23 05:28:37,265 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 [2022-07-23 05:28:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:37,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:37,284 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:37,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211777778] [2022-07-23 05:28:37,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211777778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:37,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:37,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:28:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070746716] [2022-07-23 05:28:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:37,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:37,288 INFO L87 Difference]: Start difference. First operand 155 states and 241 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) [2022-07-23 05:28:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:37,490 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-07-23 05:28:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:37,491 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 [2022-07-23 05:28:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:37,492 INFO L225 Difference]: With dead ends: 208 [2022-07-23 05:28:37,492 INFO L226 Difference]: Without dead ends: 208 [2022-07-23 05:28:37,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:28:37,493 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 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 [2022-07-23 05:28:37,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-23 05:28:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-07-23 05:28:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-23 05:28:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-07-23 05:28:37,513 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-07-23 05:28:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:37,513 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-07-23 05:28:37,514 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) [2022-07-23 05:28:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-07-23 05:28:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:28:37,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:37,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:37,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:37,719 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)] === [2022-07-23 05:28:37,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:37,719 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-23 05:28:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967920845] [2022-07-23 05:28:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:37,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:37,722 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) [2022-07-23 05:28:37,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 05:28:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:37,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:28:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:37,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:37,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967920845] [2022-07-23 05:28:37,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967920845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:37,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:37,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:28:37,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914399583] [2022-07-23 05:28:37,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:37,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:37,824 INFO L87 Difference]: Start difference. First operand 155 states and 239 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) [2022-07-23 05:28:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:37,968 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-07-23 05:28:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:37,968 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 [2022-07-23 05:28:37,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:37,970 INFO L225 Difference]: With dead ends: 234 [2022-07-23 05:28:37,970 INFO L226 Difference]: Without dead ends: 234 [2022-07-23 05:28:37,970 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 [2022-07-23 05:28:37,971 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:37,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:28:37,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-23 05:28:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-07-23 05:28:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-23 05:28:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-07-23 05:28:37,985 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-07-23 05:28:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:37,985 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-07-23 05:28:37,985 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) [2022-07-23 05:28:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-07-23 05:28:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:28:37,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:37,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:38,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:38,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:38,195 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)] === [2022-07-23 05:28:38,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:38,196 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-23 05:28:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84175262] [2022-07-23 05:28:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:38,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:38,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:38,232 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) [2022-07-23 05:28:38,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 05:28:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:28:38,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:38,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:38,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84175262] [2022-07-23 05:28:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84175262] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:38,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:28:38,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449372938] [2022-07-23 05:28:38,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:28:38,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:28:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:28:38,346 INFO L87 Difference]: Start difference. First operand 191 states and 289 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) [2022-07-23 05:28:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:38,534 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-07-23 05:28:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:28:38,534 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 [2022-07-23 05:28:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:38,536 INFO L225 Difference]: With dead ends: 231 [2022-07-23 05:28:38,536 INFO L226 Difference]: Without dead ends: 231 [2022-07-23 05:28:38,536 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 [2022-07-23 05:28:38,537 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:38,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:28:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-23 05:28:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-07-23 05:28:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-23 05:28:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-07-23 05:28:38,557 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-07-23 05:28:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:38,558 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-07-23 05:28:38,558 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) [2022-07-23 05:28:38,558 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-07-23 05:28:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-23 05:28:38,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:38,559 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:38,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:38,769 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)] === [2022-07-23 05:28:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-23 05:28:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:38,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125401334] [2022-07-23 05:28:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:38,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:38,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:38,771 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) [2022-07-23 05:28:38,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 05:28:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:28:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:38,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:39,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:39,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125401334] [2022-07-23 05:28:39,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125401334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:39,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:39,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-23 05:28:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454213372] [2022-07-23 05:28:39,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:28:39,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:28:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:28:39,457 INFO L87 Difference]: Start difference. First operand 201 states and 302 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) [2022-07-23 05:28:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:39,915 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-07-23 05:28:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:28:39,918 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 [2022-07-23 05:28:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:39,920 INFO L225 Difference]: With dead ends: 367 [2022-07-23 05:28:39,920 INFO L226 Difference]: Without dead ends: 367 [2022-07-23 05:28:39,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:28:39,921 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:39,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:28:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-23 05:28:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-07-23 05:28:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-23 05:28:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-07-23 05:28:39,933 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-07-23 05:28:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:39,934 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-07-23 05:28:39,934 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) [2022-07-23 05:28:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-07-23 05:28:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:28:39,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:39,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:39,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-23 05:28:40,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:40,144 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)] === [2022-07-23 05:28:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:40,145 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-23 05:28:40,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:40,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403914325] [2022-07-23 05:28:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:40,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:40,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:40,147 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) [2022-07-23 05:28:40,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-23 05:28:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-23 05:28:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:40,361 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 [2022-07-23 05:28:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:40,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:40,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403914325] [2022-07-23 05:28:40,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403914325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:40,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:40,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 05:28:40,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249054603] [2022-07-23 05:28:40,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:40,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:28:40,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:40,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:28:40,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:28:40,503 INFO L87 Difference]: Start difference. First operand 239 states and 363 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) [2022-07-23 05:28:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:40,863 INFO L93 Difference]: Finished difference Result 405 states and 567 transitions. [2022-07-23 05:28:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:28:40,864 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 [2022-07-23 05:28:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:40,866 INFO L225 Difference]: With dead ends: 405 [2022-07-23 05:28:40,866 INFO L226 Difference]: Without dead ends: 405 [2022-07-23 05:28:40,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:28:40,867 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 267 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:40,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 323 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:28:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-23 05:28:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2022-07-23 05:28:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.6142857142857143) internal successors, (339), 234 states have internal predecessors, (339), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-23 05:28:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 378 transitions. [2022-07-23 05:28:40,885 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 378 transitions. Word has length 15 [2022-07-23 05:28:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:40,885 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 378 transitions. [2022-07-23 05:28:40,885 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) [2022-07-23 05:28:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 378 transitions. [2022-07-23 05:28:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:28:40,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:40,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:40,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:41,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:41,096 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)] === [2022-07-23 05:28:41,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:41,097 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-23 05:28:41,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:41,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223820045] [2022-07-23 05:28:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:41,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:41,099 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) [2022-07-23 05:28:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 05:28:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:41,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 05:28:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:41,365 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 [2022-07-23 05:28:41,369 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 [2022-07-23 05:28:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:41,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:41,542 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223820045] [2022-07-23 05:28:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223820045] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:41,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:41,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 05:28:41,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632719485] [2022-07-23 05:28:41,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:41,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:28:41,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:28:41,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:28:41,544 INFO L87 Difference]: Start difference. First operand 249 states and 378 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) [2022-07-23 05:28:42,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:42,485 INFO L93 Difference]: Finished difference Result 626 states and 845 transitions. [2022-07-23 05:28:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:28:42,486 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 [2022-07-23 05:28:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:42,489 INFO L225 Difference]: With dead ends: 626 [2022-07-23 05:28:42,489 INFO L226 Difference]: Without dead ends: 626 [2022-07-23 05:28:42,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:28:42,490 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 460 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:42,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 606 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:28:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-07-23 05:28:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 349. [2022-07-23 05:28:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 303 states have (on average 1.6336633663366336) internal successors, (495), 330 states have internal predecessors, (495), 11 states have call successors, (11), 7 states have call predecessors, (11), 15 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-07-23 05:28:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 548 transitions. [2022-07-23 05:28:42,507 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 548 transitions. Word has length 16 [2022-07-23 05:28:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:42,508 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 548 transitions. [2022-07-23 05:28:42,508 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) [2022-07-23 05:28:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 548 transitions. [2022-07-23 05:28:42,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-23 05:28:42,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:42,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:28:42,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:42,727 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)] === [2022-07-23 05:28:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-23 05:28:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:42,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847689609] [2022-07-23 05:28:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:42,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:42,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:42,730 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) [2022-07-23 05:28:42,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 05:28:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:28:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:42,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:42,829 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:42,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847689609] [2022-07-23 05:28:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847689609] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:42,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:42,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:28:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701849937] [2022-07-23 05:28:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:28:42,831 INFO L87 Difference]: Start difference. First operand 349 states and 548 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) [2022-07-23 05:28:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:42,855 INFO L93 Difference]: Finished difference Result 378 states and 554 transitions. [2022-07-23 05:28:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:42,856 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 [2022-07-23 05:28:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:42,858 INFO L225 Difference]: With dead ends: 378 [2022-07-23 05:28:42,858 INFO L226 Difference]: Without dead ends: 378 [2022-07-23 05:28:42,858 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 [2022-07-23 05:28:42,859 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:42,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-23 05:28:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2022-07-23 05:28:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 318 states have (on average 1.5628930817610063) internal successors, (497), 347 states have internal predecessors, (497), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (43), 11 states have call predecessors, (43), 11 states have call successors, (43) [2022-07-23 05:28:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 551 transitions. [2022-07-23 05:28:42,872 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 551 transitions. Word has length 18 [2022-07-23 05:28:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:42,872 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 551 transitions. [2022-07-23 05:28:42,873 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) [2022-07-23 05:28:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 551 transitions. [2022-07-23 05:28:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:28:42,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:42,874 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-23 05:28:42,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:43,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-07-23 05:28:43,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:43,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178450168] [2022-07-23 05:28:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:28:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:43,085 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) [2022-07-23 05:28:43,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 05:28:43,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:28:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:28:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:28:43,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:43,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:44,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:44,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178450168] [2022-07-23 05:28:44,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178450168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:28:44,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:44,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-07-23 05:28:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314300453] [2022-07-23 05:28:44,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:44,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:28:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:28:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:28:44,195 INFO L87 Difference]: Start difference. First operand 367 states and 551 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) [2022-07-23 05:28:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:46,182 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2022-07-23 05:28:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:28:46,183 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 [2022-07-23 05:28:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:46,185 INFO L225 Difference]: With dead ends: 620 [2022-07-23 05:28:46,186 INFO L226 Difference]: Without dead ends: 620 [2022-07-23 05:28:46,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:28:46,186 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 458 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:28:46,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 360 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-23 05:28:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-23 05:28:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 402. [2022-07-23 05:28:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 354 states have (on average 1.612994350282486) internal successors, (571), 382 states have internal predecessors, (571), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-07-23 05:28:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 618 transitions. [2022-07-23 05:28:46,201 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 618 transitions. Word has length 22 [2022-07-23 05:28:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:46,201 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 618 transitions. [2022-07-23 05:28:46,202 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) [2022-07-23 05:28:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 618 transitions. [2022-07-23 05:28:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 05:28:46,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:46,203 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] [2022-07-23 05:28:46,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:46,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:46,412 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:28:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:46,413 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-23 05:28:46,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:46,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554463588] [2022-07-23 05:28:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:46,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:46,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:46,415 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) [2022-07-23 05:28:46,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-23 05:28:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 05:28:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:46,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:28:46,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:46,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554463588] [2022-07-23 05:28:46,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554463588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:28:46,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:28:46,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:28:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108898716] [2022-07-23 05:28:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:28:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:28:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:46,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:28:46,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:28:46,486 INFO L87 Difference]: Start difference. First operand 402 states and 618 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) [2022-07-23 05:28:46,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:28:46,497 INFO L93 Difference]: Finished difference Result 303 states and 456 transitions. [2022-07-23 05:28:46,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:28:46,499 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 [2022-07-23 05:28:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:28:46,501 INFO L225 Difference]: With dead ends: 303 [2022-07-23 05:28:46,501 INFO L226 Difference]: Without dead ends: 303 [2022-07-23 05:28:46,502 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 [2022-07-23 05:28:46,502 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 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 [2022-07-23 05:28:46,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:28:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-23 05:28:46,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-07-23 05:28:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 263 states have (on average 1.6121673003802282) internal successors, (424), 288 states have internal predecessors, (424), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-23 05:28:46,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 456 transitions. [2022-07-23 05:28:46,511 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 456 transitions. Word has length 25 [2022-07-23 05:28:46,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:28:46,512 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 456 transitions. [2022-07-23 05:28:46,512 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) [2022-07-23 05:28:46,512 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 456 transitions. [2022-07-23 05:28:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:28:46,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:28:46,515 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] [2022-07-23 05:28:46,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:28:46,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:28:46,724 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)] === [2022-07-23 05:28:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:28:46,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-23 05:28:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:28:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298201466] [2022-07-23 05:28:46,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:46,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:28:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:28:46,726 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) [2022-07-23 05:28:46,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 05:28:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:28:46,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:49,135 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 [2022-07-23 05:28:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:49,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:51,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:28:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1298201466] [2022-07-23 05:28:51,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1298201466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [295323691] [2022-07-23 05:28:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:28:51,565 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:28:51,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:28:51,567 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:28:51,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-23 05:28:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:28:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 05:28:51,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:28:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:28:53,943 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 [2022-07-23 05:28:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:28:53,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:28:56,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [295323691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:28:56,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:28:56,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-23 05:28:56,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966974017] [2022-07-23 05:28:56,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:28:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:28:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:28:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:28:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-07-23 05:28:56,197 INFO L87 Difference]: Start difference. First operand 303 states and 456 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) [2022-07-23 05:29:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:00,597 INFO L93 Difference]: Finished difference Result 526 states and 738 transitions. [2022-07-23 05:29:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:29:00,597 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 [2022-07-23 05:29:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:00,600 INFO L225 Difference]: With dead ends: 526 [2022-07-23 05:29:00,600 INFO L226 Difference]: Without dead ends: 526 [2022-07-23 05:29:00,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=74, Invalid=163, Unknown=3, NotChecked=0, Total=240 [2022-07-23 05:29:00,600 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 297 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:00,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 203 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-07-23 05:29:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-23 05:29:00,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 426. [2022-07-23 05:29:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 379 states have (on average 1.6094986807387863) internal successors, (610), 407 states have internal predecessors, (610), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-23 05:29:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 654 transitions. [2022-07-23 05:29:00,622 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 654 transitions. Word has length 27 [2022-07-23 05:29:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:00,623 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 654 transitions. [2022-07-23 05:29:00,623 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) [2022-07-23 05:29:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 654 transitions. [2022-07-23 05:29:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-23 05:29:00,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:00,624 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:00,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:00,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-23 05:29:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:01,027 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:01,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-23 05:29:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:01,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600364446] [2022-07-23 05:29:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:01,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:01,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:01,030 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) [2022-07-23 05:29:01,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 05:29:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:29:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:01,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:01,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600364446] [2022-07-23 05:29:01,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600364446] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:01,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:01,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-23 05:29:01,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071397779] [2022-07-23 05:29:01,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:01,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:29:01,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:29:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:29:01,309 INFO L87 Difference]: Start difference. First operand 426 states and 654 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2022-07-23 05:29:01,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:01,647 INFO L93 Difference]: Finished difference Result 593 states and 828 transitions. [2022-07-23 05:29:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:29:01,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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 28 [2022-07-23 05:29:01,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:01,653 INFO L225 Difference]: With dead ends: 593 [2022-07-23 05:29:01,653 INFO L226 Difference]: Without dead ends: 593 [2022-07-23 05:29:01,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:29:01,654 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 305 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:01,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 277 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:29:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-23 05:29:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 518. [2022-07-23 05:29:01,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 468 states have (on average 1.5320512820512822) internal successors, (717), 497 states have internal predecessors, (717), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-23 05:29:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 761 transitions. [2022-07-23 05:29:01,671 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 761 transitions. Word has length 28 [2022-07-23 05:29:01,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:01,672 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 761 transitions. [2022-07-23 05:29:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2022-07-23 05:29:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 761 transitions. [2022-07-23 05:29:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:29:01,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:01,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:01,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:01,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:01,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-07-23 05:29:01,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467709843] [2022-07-23 05:29:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:01,889 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:01,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:29:01,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 05:29:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:29:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:02,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:02,204 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467709843] [2022-07-23 05:29:02,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467709843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:02,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:02,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 05:29:02,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435829117] [2022-07-23 05:29:02,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:02,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:29:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:02,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:29:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:29:02,205 INFO L87 Difference]: Start difference. First operand 518 states and 761 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-07-23 05:29:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:02,688 INFO L93 Difference]: Finished difference Result 571 states and 788 transitions. [2022-07-23 05:29:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:29:02,689 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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 29 [2022-07-23 05:29:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:02,691 INFO L225 Difference]: With dead ends: 571 [2022-07-23 05:29:02,691 INFO L226 Difference]: Without dead ends: 571 [2022-07-23 05:29:02,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:29:02,692 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 348 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:02,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 316 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:29:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-23 05:29:02,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 522. [2022-07-23 05:29:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 471 states have (on average 1.494692144373673) internal successors, (704), 501 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 21 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-23 05:29:02,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 746 transitions. [2022-07-23 05:29:02,706 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 746 transitions. Word has length 29 [2022-07-23 05:29:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:02,706 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 746 transitions. [2022-07-23 05:29:02,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-07-23 05:29:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 746 transitions. [2022-07-23 05:29:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:29:02,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:02,708 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] [2022-07-23 05:29:02,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:02,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:02,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-23 05:29:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:02,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242832823] [2022-07-23 05:29:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:02,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:02,921 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) [2022-07-23 05:29:02,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-23 05:29:03,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:03,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:29:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:05,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:05,351 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 [2022-07-23 05:29:05,443 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 [2022-07-23 05:29:05,448 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 [2022-07-23 05:29:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:05,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:07,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:07,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242832823] [2022-07-23 05:29:07,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242832823] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:07,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263189932] [2022-07-23 05:29:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:07,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:29:07,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:29:07,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:29:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-23 05:29:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:29:07,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:12,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:12,177 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 [2022-07-23 05:29:12,235 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 [2022-07-23 05:29:12,239 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 [2022-07-23 05:29:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:12,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:14,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263189932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:14,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:14,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-23 05:29:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419113424] [2022-07-23 05:29:14,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:14,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:29:14,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:29:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-23 05:29:14,417 INFO L87 Difference]: Start difference. First operand 522 states and 746 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) [2022-07-23 05:29:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:21,036 INFO L93 Difference]: Finished difference Result 705 states and 930 transitions. [2022-07-23 05:29:21,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:29:21,037 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 [2022-07-23 05:29:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:21,040 INFO L225 Difference]: With dead ends: 705 [2022-07-23 05:29:21,040 INFO L226 Difference]: Without dead ends: 705 [2022-07-23 05:29:21,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-23 05:29:21,040 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:21,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 293 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 218 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-07-23 05:29:21,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-07-23 05:29:21,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 527. [2022-07-23 05:29:21,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 479 states have (on average 1.5052192066805845) internal successors, (721), 506 states have internal predecessors, (721), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:29:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 757 transitions. [2022-07-23 05:29:21,061 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 757 transitions. Word has length 29 [2022-07-23 05:29:21,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:21,061 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 757 transitions. [2022-07-23 05:29:21,061 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) [2022-07-23 05:29:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 757 transitions. [2022-07-23 05:29:21,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-23 05:29:21,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:21,062 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] [2022-07-23 05:29:21,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:21,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:21,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:21,466 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:21,467 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-23 05:29:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:21,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508123248] [2022-07-23 05:29:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:21,467 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:21,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:21,469 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:29:21,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-23 05:29:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:29:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:23,805 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 [2022-07-23 05:29:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:23,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:30,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508123248] [2022-07-23 05:29:30,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508123248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:30,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [230248831] [2022-07-23 05:29:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:30,483 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:29:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:29:30,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:29:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-23 05:29:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 05:29:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:32,857 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 [2022-07-23 05:29:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:32,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:35,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [230248831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:35,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:35,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-23 05:29:35,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955848384] [2022-07-23 05:29:35,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:35,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:29:35,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:35,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:29:35,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=98, Unknown=2, NotChecked=0, Total=132 [2022-07-23 05:29:35,294 INFO L87 Difference]: Start difference. First operand 527 states and 757 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) [2022-07-23 05:29:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:39,774 INFO L93 Difference]: Finished difference Result 836 states and 1086 transitions. [2022-07-23 05:29:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:29:39,775 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 [2022-07-23 05:29:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:39,777 INFO L225 Difference]: With dead ends: 836 [2022-07-23 05:29:39,778 INFO L226 Difference]: Without dead ends: 836 [2022-07-23 05:29:39,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-07-23 05:29:39,779 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 422 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:39,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 315 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-07-23 05:29:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-07-23 05:29:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 529. [2022-07-23 05:29:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 481 states have (on average 1.4636174636174637) internal successors, (704), 508 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-23 05:29:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 740 transitions. [2022-07-23 05:29:39,797 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 740 transitions. Word has length 35 [2022-07-23 05:29:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:39,798 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 740 transitions. [2022-07-23 05:29:39,798 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) [2022-07-23 05:29:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 740 transitions. [2022-07-23 05:29:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 05:29:39,799 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:39,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:39,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:40,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-07-23 05:29:40,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:29:40,209 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1271207958, now seen corresponding path program 1 times [2022-07-23 05:29:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:40,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296534087] [2022-07-23 05:29:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:40,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:40,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:40,212 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) [2022-07-23 05:29:40,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 05:29:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:29:40,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:40,497 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 31 treesize of output 19 [2022-07-23 05:29:40,500 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 25 treesize of output 13 [2022-07-23 05:29:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:40,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:41,424 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-23 05:29:41,425 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 36 treesize of output 26 [2022-07-23 05:29:41,434 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-23 05:29:41,435 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 27 treesize of output 12 [2022-07-23 05:29:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:41,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296534087] [2022-07-23 05:29:41,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296534087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:41,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:41,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-23 05:29:41,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209417336] [2022-07-23 05:29:41,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:41,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:29:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:41,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:29:41,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:29:41,462 INFO L87 Difference]: Start difference. First operand 529 states and 740 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2022-07-23 05:29:41,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:41,882 INFO L93 Difference]: Finished difference Result 576 states and 756 transitions. [2022-07-23 05:29:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:29:41,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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 39 [2022-07-23 05:29:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:41,884 INFO L225 Difference]: With dead ends: 576 [2022-07-23 05:29:41,885 INFO L226 Difference]: Without dead ends: 576 [2022-07-23 05:29:41,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:29:41,885 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 231 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:41,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 410 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:29:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-23 05:29:41,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 486. [2022-07-23 05:29:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 441 states have (on average 1.4285714285714286) internal successors, (630), 467 states have internal predecessors, (630), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-23 05:29:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 662 transitions. [2022-07-23 05:29:41,897 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 662 transitions. Word has length 39 [2022-07-23 05:29:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:41,897 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 662 transitions. [2022-07-23 05:29:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 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) [2022-07-23 05:29:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 662 transitions. [2022-07-23 05:29:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:29:41,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:41,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:42,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:42,108 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:42,109 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-23 05:29:42,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666763287] [2022-07-23 05:29:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:42,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:42,111 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) [2022-07-23 05:29:42,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 05:29:42,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:29:42,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:42,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:42,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666763287] [2022-07-23 05:29:42,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666763287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:42,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:42,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 05:29:42,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862987810] [2022-07-23 05:29:42,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:42,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:29:42,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:42,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:29:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:29:42,285 INFO L87 Difference]: Start difference. First operand 486 states and 662 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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) [2022-07-23 05:29:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:42,306 INFO L93 Difference]: Finished difference Result 496 states and 668 transitions. [2022-07-23 05:29:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:29:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 40 [2022-07-23 05:29:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:42,308 INFO L225 Difference]: With dead ends: 496 [2022-07-23 05:29:42,308 INFO L226 Difference]: Without dead ends: 496 [2022-07-23 05:29:42,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:29:42,309 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:42,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:29:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-23 05:29:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 484. [2022-07-23 05:29:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 441 states have (on average 1.4149659863945578) internal successors, (624), 465 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-23 05:29:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 656 transitions. [2022-07-23 05:29:42,318 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 656 transitions. Word has length 40 [2022-07-23 05:29:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:42,318 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 656 transitions. [2022-07-23 05:29:42,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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) [2022-07-23 05:29:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 656 transitions. [2022-07-23 05:29:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 05:29:42,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:42,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:42,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:42,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:42,529 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:42,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-23 05:29:42,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714823607] [2022-07-23 05:29:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:42,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:42,532 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:29:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 05:29:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:29:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:42,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:42,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:42,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714823607] [2022-07-23 05:29:42,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714823607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:42,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:42,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-23 05:29:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718506863] [2022-07-23 05:29:42,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:42,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:29:42,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:42,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:29:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:29:42,816 INFO L87 Difference]: Start difference. First operand 484 states and 656 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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) [2022-07-23 05:29:42,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:42,934 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2022-07-23 05:29:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:29:42,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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 41 [2022-07-23 05:29:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:42,937 INFO L225 Difference]: With dead ends: 432 [2022-07-23 05:29:42,937 INFO L226 Difference]: Without dead ends: 432 [2022-07-23 05:29:42,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:29:42,938 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 137 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:42,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 162 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:29:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-23 05:29:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 402. [2022-07-23 05:29:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 366 states have (on average 1.407103825136612) internal successors, (515), 385 states have internal predecessors, (515), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:29:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 539 transitions. [2022-07-23 05:29:42,950 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 539 transitions. Word has length 41 [2022-07-23 05:29:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:42,950 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 539 transitions. [2022-07-23 05:29:42,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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) [2022-07-23 05:29:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 539 transitions. [2022-07-23 05:29:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-23 05:29:42,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:42,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:29:42,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:43,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:43,161 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-23 05:29:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:43,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341055261] [2022-07-23 05:29:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:43,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:43,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:43,163 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) [2022-07-23 05:29:43,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 05:29:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:29:43,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:43,268 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 [2022-07-23 05:29:43,323 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-23 05:29:43,324 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 17 [2022-07-23 05:29:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:43,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:29:43,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:43,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341055261] [2022-07-23 05:29:43,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341055261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:43,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:43,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-23 05:29:43,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530096513] [2022-07-23 05:29:43,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:29:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:43,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:29:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:29:43,426 INFO L87 Difference]: Start difference. First operand 402 states and 539 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) [2022-07-23 05:29:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:43,570 INFO L93 Difference]: Finished difference Result 434 states and 560 transitions. [2022-07-23 05:29:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:29:43,571 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 42 [2022-07-23 05:29:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:43,572 INFO L225 Difference]: With dead ends: 434 [2022-07-23 05:29:43,572 INFO L226 Difference]: Without dead ends: 434 [2022-07-23 05:29:43,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:29:43,573 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:43,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:29:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-23 05:29:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 410. [2022-07-23 05:29:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.3983957219251337) internal successors, (523), 393 states have internal predecessors, (523), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:29:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2022-07-23 05:29:43,581 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 42 [2022-07-23 05:29:43,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:43,581 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2022-07-23 05:29:43,581 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) [2022-07-23 05:29:43,581 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2022-07-23 05:29:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-23 05:29:43,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:43,582 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] [2022-07-23 05:29:43,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:43,791 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)] === [2022-07-23 05:29:43,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1701301426, now seen corresponding path program 1 times [2022-07-23 05:29:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [163709347] [2022-07-23 05:29:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:43,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:43,794 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) [2022-07-23 05:29:43,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 05:29:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 05:29:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:29:43,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:43,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:29:43,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:43,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [163709347] [2022-07-23 05:29:43,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [163709347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:29:43,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:43,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-23 05:29:43,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359460287] [2022-07-23 05:29:43,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:43,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:29:43,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:29:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:29:43,988 INFO L87 Difference]: Start difference. First operand 410 states and 547 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) [2022-07-23 05:29:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:44,099 INFO L93 Difference]: Finished difference Result 413 states and 499 transitions. [2022-07-23 05:29:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:29:44,100 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 [2022-07-23 05:29:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:44,101 INFO L225 Difference]: With dead ends: 413 [2022-07-23 05:29:44,101 INFO L226 Difference]: Without dead ends: 413 [2022-07-23 05:29:44,101 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 [2022-07-23 05:29:44,102 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 178 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 356 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 [2022-07-23 05:29:44,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 356 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:29:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-23 05:29:44,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 352. [2022-07-23 05:29:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 335 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:29:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 442 transitions. [2022-07-23 05:29:44,108 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 442 transitions. Word has length 44 [2022-07-23 05:29:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:44,109 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 442 transitions. [2022-07-23 05:29:44,109 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) [2022-07-23 05:29:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 442 transitions. [2022-07-23 05:29:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-23 05:29:44,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:44,110 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] [2022-07-23 05:29:44,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:29:44,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:44,319 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)] === [2022-07-23 05:29:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:44,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-23 05:29:44,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:44,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018028142] [2022-07-23 05:29:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:44,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:44,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:44,322 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) [2022-07-23 05:29:44,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 05:29:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:44,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:29:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:46,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:46,812 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 [2022-07-23 05:29:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:29:46,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:49,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018028142] [2022-07-23 05:29:49,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018028142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978599195] [2022-07-23 05:29:49,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:49,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:29:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:29:49,305 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) [2022-07-23 05:29:49,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-23 05:29:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:29:49,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:29:51,884 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 [2022-07-23 05:29:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:29:51,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:29:54,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978599195] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:29:54,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:29:54,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-23 05:29:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858485190] [2022-07-23 05:29:54,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:29:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:29:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:29:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2022-07-23 05:29:54,070 INFO L87 Difference]: Start difference. First operand 352 states and 442 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) [2022-07-23 05:29:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:58,577 INFO L93 Difference]: Finished difference Result 413 states and 485 transitions. [2022-07-23 05:29:58,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:29:58,577 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 [2022-07-23 05:29:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:58,578 INFO L225 Difference]: With dead ends: 413 [2022-07-23 05:29:58,578 INFO L226 Difference]: Without dead ends: 413 [2022-07-23 05:29:58,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=127, Invalid=290, Unknown=3, NotChecked=0, Total=420 [2022-07-23 05:29:58,579 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 294 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:29:58,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 247 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-07-23 05:29:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-23 05:29:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 351. [2022-07-23 05:29:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 315 states have (on average 1.3142857142857143) internal successors, (414), 334 states have internal predecessors, (414), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-23 05:29:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 438 transitions. [2022-07-23 05:29:58,586 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 438 transitions. Word has length 48 [2022-07-23 05:29:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:58,586 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 438 transitions. [2022-07-23 05:29:58,586 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) [2022-07-23 05:29:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 438 transitions. [2022-07-23 05:29:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-23 05:29:58,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:58,587 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] [2022-07-23 05:29:58,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-07-23 05:29:58,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-23 05:29:58,991 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 [2022-07-23 05:29:58,991 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)] === [2022-07-23 05:29:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-23 05:29:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525129498] [2022-07-23 05:29:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:58,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:58,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:58,993 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) [2022-07-23 05:29:58,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-23 05:29:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:29:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:29:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 05:29:59,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:29:59,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:29:59,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525129498] [2022-07-23 05:29:59,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525129498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:29:59,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:29:59,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:29:59,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069478056] [2022-07-23 05:29:59,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:29:59,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:29:59,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:29:59,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:29:59,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:29:59,094 INFO L87 Difference]: Start difference. First operand 351 states and 438 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) [2022-07-23 05:29:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:29:59,099 INFO L93 Difference]: Finished difference Result 296 states and 351 transitions. [2022-07-23 05:29:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:29:59,099 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 [2022-07-23 05:29:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:29:59,101 INFO L225 Difference]: With dead ends: 296 [2022-07-23 05:29:59,101 INFO L226 Difference]: Without dead ends: 296 [2022-07-23 05:29:59,101 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 [2022-07-23 05:29:59,102 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 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 [2022-07-23 05:29:59,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:29:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-23 05:29:59,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 281. [2022-07-23 05:29:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.253968253968254) internal successors, (316), 266 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 05:29:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 336 transitions. [2022-07-23 05:29:59,107 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 336 transitions. Word has length 47 [2022-07-23 05:29:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:29:59,108 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 336 transitions. [2022-07-23 05:29:59,108 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) [2022-07-23 05:29:59,108 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 336 transitions. [2022-07-23 05:29:59,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:29:59,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:29:59,109 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] [2022-07-23 05:29:59,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-23 05:29:59,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:29:59,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:29:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:29:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-23 05:29:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:29:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347444358] [2022-07-23 05:29:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:29:59,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:29:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:29:59,321 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) [2022-07-23 05:29:59,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-23 05:29:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:29:59,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:29:59,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:01,993 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 [2022-07-23 05:30:02,096 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 [2022-07-23 05:30:02,101 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 [2022-07-23 05:30:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:30:02,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:04,382 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347444358] [2022-07-23 05:30:04,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347444358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:30:04,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1670917326] [2022-07-23 05:30:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:04,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:30:04,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:30:04,386 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:30:04,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-23 05:30:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:30:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:09,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:09,176 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 [2022-07-23 05:30:09,225 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 [2022-07-23 05:30:09,229 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 [2022-07-23 05:30:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 05:30:09,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:11,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1670917326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:30:11,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:30:11,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-23 05:30:11,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384922883] [2022-07-23 05:30:11,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:30:11,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:30:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:30:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:30:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-23 05:30:11,385 INFO L87 Difference]: Start difference. First operand 281 states and 336 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) [2022-07-23 05:30:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:30:17,865 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2022-07-23 05:30:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:30:17,865 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 [2022-07-23 05:30:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:30:17,867 INFO L225 Difference]: With dead ends: 326 [2022-07-23 05:30:17,867 INFO L226 Difference]: Without dead ends: 326 [2022-07-23 05:30:17,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-23 05:30:17,868 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 126 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:30:17,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 231 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-07-23 05:30:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-23 05:30:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-23 05:30:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.25) internal successors, (315), 266 states have internal predecessors, (315), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 05:30:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 335 transitions. [2022-07-23 05:30:17,873 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 335 transitions. Word has length 50 [2022-07-23 05:30:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:30:17,874 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 335 transitions. [2022-07-23 05:30:17,874 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) [2022-07-23 05:30:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 335 transitions. [2022-07-23 05:30:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:30:17,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:30:17,875 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:30:17,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:30:18,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:30:18,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:30:18,289 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:30:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:30:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-23 05:30:18,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:30:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785368919] [2022-07-23 05:30:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:18,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:30:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:30:18,291 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) [2022-07-23 05:30:18,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-23 05:30:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:18,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:30:18,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:30:18,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:30:18,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785368919] [2022-07-23 05:30:18,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785368919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:30:18,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:30:18,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-23 05:30:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309240726] [2022-07-23 05:30:18,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:30:18,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:30:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:30:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:30:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:30:18,681 INFO L87 Difference]: Start difference. First operand 281 states and 335 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) [2022-07-23 05:30:19,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:30:19,023 INFO L93 Difference]: Finished difference Result 303 states and 345 transitions. [2022-07-23 05:30:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:30:19,024 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 [2022-07-23 05:30:19,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:30:19,025 INFO L225 Difference]: With dead ends: 303 [2022-07-23 05:30:19,025 INFO L226 Difference]: Without dead ends: 303 [2022-07-23 05:30:19,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:30:19,026 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 221 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:30:19,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 187 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:30:19,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-23 05:30:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 281. [2022-07-23 05:30:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.2380952380952381) internal successors, (312), 266 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-23 05:30:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 332 transitions. [2022-07-23 05:30:19,031 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 332 transitions. Word has length 51 [2022-07-23 05:30:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:30:19,031 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 332 transitions. [2022-07-23 05:30:19,031 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) [2022-07-23 05:30:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 332 transitions. [2022-07-23 05:30:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:30:19,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:30:19,032 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, 1, 1, 1] [2022-07-23 05:30:19,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-23 05:30:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:30:19,244 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:30:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:30:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-23 05:30:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:30:19,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970821157] [2022-07-23 05:30:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:30:19,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:30:19,248 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) [2022-07-23 05:30:19,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-23 05:30:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:30:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:19,458 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:30:19,459 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 [2022-07-23 05:30:21,764 INFO L356 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2022-07-23 05:30:21,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 36 [2022-07-23 05:30:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:21,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:21,877 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:30:21,878 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 113 treesize of output 108 [2022-07-23 05:30:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:26,497 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:26,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970821157] [2022-07-23 05:30:26,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970821157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:30:26,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:30:26,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-07-23 05:30:26,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495069615] [2022-07-23 05:30:26,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:30:26,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:30:26,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:30:26,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:30:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=303, Unknown=3, NotChecked=0, Total=380 [2022-07-23 05:30:26,498 INFO L87 Difference]: Start difference. First operand 281 states and 332 transitions. Second operand has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:30:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:30:29,456 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2022-07-23 05:30:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:30:29,457 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2022-07-23 05:30:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:30:29,458 INFO L225 Difference]: With dead ends: 314 [2022-07-23 05:30:29,458 INFO L226 Difference]: Without dead ends: 314 [2022-07-23 05:30:29,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=151, Invalid=547, Unknown=4, NotChecked=0, Total=702 [2022-07-23 05:30:29,458 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 214 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:30:29,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 418 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 259 Invalid, 0 Unknown, 174 Unchecked, 0.4s Time] [2022-07-23 05:30:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-23 05:30:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-07-23 05:30:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.2061068702290076) internal successors, (316), 273 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-23 05:30:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2022-07-23 05:30:29,464 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 51 [2022-07-23 05:30:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:30:29,465 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2022-07-23 05:30:29,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:30:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2022-07-23 05:30:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-23 05:30:29,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:30:29,466 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, 1, 1, 1] [2022-07-23 05:30:29,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-07-23 05:30:29,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:30:29,677 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:30:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:30:29,678 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-23 05:30:29,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:30:29,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626113289] [2022-07-23 05:30:29,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:30:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:30:29,680 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:30:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-23 05:30:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:30:29,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:32,056 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 [2022-07-23 05:30:34,249 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:30:34,250 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 [2022-07-23 05:30:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:35,458 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 [2022-07-23 05:30:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:35,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:35,754 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:30:35,754 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 [2022-07-23 05:30:38,216 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:30:38,219 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 [2022-07-23 05:30:38,950 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626113289] [2022-07-23 05:30:38,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626113289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:30:38,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1601641293] [2022-07-23 05:30:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:38,951 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:30:38,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:30:38,956 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:30:38,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-23 05:30:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:39,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:30:39,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:41,383 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 [2022-07-23 05:30:41,542 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:30:41,543 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 [2022-07-23 05:30:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:30:41,970 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 [2022-07-23 05:30:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:42,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:42,156 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:30:42,156 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 [2022-07-23 05:30:44,635 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:30:44,635 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 [2022-07-23 05:30:45,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1601641293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:30:45,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:30:45,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 05:30:45,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865188513] [2022-07-23 05:30:45,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:30:45,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:30:45,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:30:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:30:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=157, Unknown=3, NotChecked=0, Total=210 [2022-07-23 05:30:45,186 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 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) [2022-07-23 05:30:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:30:49,719 INFO L93 Difference]: Finished difference Result 335 states and 377 transitions. [2022-07-23 05:30:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:30:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 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 51 [2022-07-23 05:30:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:30:49,720 INFO L225 Difference]: With dead ends: 335 [2022-07-23 05:30:49,720 INFO L226 Difference]: Without dead ends: 335 [2022-07-23 05:30:49,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=122, Invalid=293, Unknown=5, NotChecked=0, Total=420 [2022-07-23 05:30:49,721 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:30:49,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-07-23 05:30:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-23 05:30:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2022-07-23 05:30:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 273 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-23 05:30:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2022-07-23 05:30:49,727 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 51 [2022-07-23 05:30:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:30:49,727 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2022-07-23 05:30:49,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 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) [2022-07-23 05:30:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2022-07-23 05:30:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:30:49,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:30:49,728 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:30:49,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-23 05:30:49,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-23 05:30:50,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:30:50,139 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:30:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:30:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-23 05:30:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:30:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014839884] [2022-07-23 05:30:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:50,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:30:50,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:30:50,141 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) [2022-07-23 05:30:50,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-23 05:30:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:50,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:30:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:30:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-23 05:30:50,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:50,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014839884] [2022-07-23 05:30:50,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014839884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:30:50,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:30:50,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-23 05:30:50,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629253402] [2022-07-23 05:30:50,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:30:50,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:30:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:30:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:30:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:30:50,734 INFO L87 Difference]: Start difference. First operand 288 states and 332 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) [2022-07-23 05:30:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:30:51,245 INFO L93 Difference]: Finished difference Result 299 states and 339 transitions. [2022-07-23 05:30:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:30:51,245 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 [2022-07-23 05:30:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:30:51,246 INFO L225 Difference]: With dead ends: 299 [2022-07-23 05:30:51,246 INFO L226 Difference]: Without dead ends: 299 [2022-07-23 05:30:51,246 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 [2022-07-23 05:30:51,247 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 228 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:30:51,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 243 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:30:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-23 05:30:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 287. [2022-07-23 05:30:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1793893129770991) internal successors, (309), 272 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-23 05:30:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2022-07-23 05:30:51,252 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 52 [2022-07-23 05:30:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:30:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2022-07-23 05:30:51,252 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) [2022-07-23 05:30:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2022-07-23 05:30:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-23 05:30:51,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:30:51,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:30:51,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:30:51,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 05:30:51,459 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:30:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:30:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-23 05:30:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:30:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834718315] [2022-07-23 05:30:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:30:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:30:51,461 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:30:51,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-23 05:30:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 05:30:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:51,933 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 05:30:51,934 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 24 [2022-07-23 05:30:54,818 INFO L356 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2022-07-23 05:30:54,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 49 [2022-07-23 05:30:54,960 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 [2022-07-23 05:30:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:30:55,358 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:30:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834718315] [2022-07-23 05:30:55,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834718315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:30:55,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689477221] [2022-07-23 05:30:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:30:55,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:30:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:30:55,360 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:30:55,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-23 05:30:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:30:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 05:30:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:30:56,088 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 05:30:56,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-23 05:30:58,739 INFO L356 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2022-07-23 05:30:58,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 66 [2022-07-23 05:30:58,916 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 [2022-07-23 05:30:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:30:58,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:01,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1689477221] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:31:01,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:31:01,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2022-07-23 05:31:01,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983684535] [2022-07-23 05:31:01,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:31:01,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:31:01,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:31:01,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:31:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2022-07-23 05:31:01,268 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:31:08,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:31:08,811 INFO L93 Difference]: Finished difference Result 305 states and 339 transitions. [2022-07-23 05:31:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:31:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-07-23 05:31:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:31:08,812 INFO L225 Difference]: With dead ends: 305 [2022-07-23 05:31:08,812 INFO L226 Difference]: Without dead ends: 305 [2022-07-23 05:31:08,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=247, Invalid=1011, Unknown=2, NotChecked=0, Total=1260 [2022-07-23 05:31:08,814 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 398 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:31:08,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 239 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-07-23 05:31:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-23 05:31:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 287. [2022-07-23 05:31:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1755725190839694) internal successors, (308), 272 states have internal predecessors, (308), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-23 05:31:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 327 transitions. [2022-07-23 05:31:08,818 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 327 transitions. Word has length 52 [2022-07-23 05:31:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:31:08,819 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 327 transitions. [2022-07-23 05:31:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:31:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 327 transitions. [2022-07-23 05:31:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:31:08,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:31:08,820 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, 1, 1, 1] [2022-07-23 05:31:08,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:09,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:09,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:09,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:31:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:31:09,231 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-23 05:31:09,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:31:09,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318123723] [2022-07-23 05:31:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:31:09,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:31:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:31:09,232 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) [2022-07-23 05:31:09,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-23 05:31:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:31:09,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:31:09,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:31:09,691 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:31:09,691 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 [2022-07-23 05:31:10,067 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 05:31:10,067 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 [2022-07-23 05:31:10,354 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 [2022-07-23 05:31:10,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:31:10,524 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 16 treesize of output 18 [2022-07-23 05:31:10,758 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 [2022-07-23 05:31:10,761 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 [2022-07-23 05:31:10,835 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:31:10,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 05:31:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:31:10,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:11,353 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 18 treesize of output 12 [2022-07-23 05:31:11,381 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 05:31:11,382 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 20 treesize of output 19 [2022-07-23 05:31:11,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:31:11,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318123723] [2022-07-23 05:31:11,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318123723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:31:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [181014324] [2022-07-23 05:31:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:31:11,470 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:11,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:31:11,471 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:31:11,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-23 05:31:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:31:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 05:31:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:31:12,058 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:31:12,058 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 [2022-07-23 05:31:12,351 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-23 05:31:12,351 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 [2022-07-23 05:31:12,584 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 [2022-07-23 05:31:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:31:12,704 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 16 treesize of output 18 [2022-07-23 05:31:12,862 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 [2022-07-23 05:31:12,870 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 [2022-07-23 05:31:12,897 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:31:12,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-23 05:31:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:31:12,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:13,109 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-23 05:31:13,110 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 20 treesize of output 19 [2022-07-23 05:31:13,128 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 18 treesize of output 12 [2022-07-23 05:31:13,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [181014324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:31:13,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:31:13,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2022-07-23 05:31:13,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462611993] [2022-07-23 05:31:13,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:31:13,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:31:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:31:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:31:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:31:13,190 INFO L87 Difference]: Start difference. First operand 287 states and 327 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 05:31:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:31:19,266 INFO L93 Difference]: Finished difference Result 398 states and 451 transitions. [2022-07-23 05:31:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:31:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-23 05:31:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:31:19,268 INFO L225 Difference]: With dead ends: 398 [2022-07-23 05:31:19,268 INFO L226 Difference]: Without dead ends: 398 [2022-07-23 05:31:19,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=343, Invalid=1137, Unknown=2, NotChecked=0, Total=1482 [2022-07-23 05:31:19,269 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 291 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:31:19,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 313 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 120 Invalid, 0 Unknown, 276 Unchecked, 0.3s Time] [2022-07-23 05:31:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-07-23 05:31:19,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 344. [2022-07-23 05:31:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 314 states have (on average 1.1624203821656052) internal successors, (365), 325 states have internal predecessors, (365), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-23 05:31:19,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 392 transitions. [2022-07-23 05:31:19,274 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 392 transitions. Word has length 53 [2022-07-23 05:31:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:31:19,274 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 392 transitions. [2022-07-23 05:31:19,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 05:31:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 392 transitions. [2022-07-23 05:31:19,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:31:19,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:31:19,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:31:19,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:19,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:19,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:19,686 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-23 05:31:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:31:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-23 05:31:19,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:31:19,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565908731] [2022-07-23 05:31:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:31:19,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:31:19,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:31:19,688 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:31:19,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-23 05:31:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:31:19,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:31:19,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:31:19,933 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 05:31:19,933 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 24 [2022-07-23 05:31:22,323 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-23 05:31:22,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2022-07-23 05:31:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:31:22,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:22,579 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:31:22,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565908731] [2022-07-23 05:31:22,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565908731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:31:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845839603] [2022-07-23 05:31:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:31:22,580 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:22,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:31:22,581 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:31:22,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-07-23 05:31:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:31:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:31:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:31:27,041 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 05:31:27,042 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 24 [2022-07-23 05:31:33,382 INFO L356 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2022-07-23 05:31:33,383 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 2 case distinctions, treesize of input 17 treesize of output 31 [2022-07-23 05:31:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:31:33,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:31:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845839603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:31:40,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:31:40,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-23 05:31:40,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374466146] [2022-07-23 05:31:40,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:31:40,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:31:40,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 05:31:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:31:40,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=472, Unknown=7, NotChecked=0, Total=600 [2022-07-23 05:31:40,185 INFO L87 Difference]: Start difference. First operand 344 states and 392 transitions. Second operand has 24 states, 21 states have (on average 5.380952380952381) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 05:31:51,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:31:51,501 INFO L93 Difference]: Finished difference Result 365 states and 408 transitions. [2022-07-23 05:31:51,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:31:51,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 5.380952380952381) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-07-23 05:31:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:31:51,502 INFO L225 Difference]: With dead ends: 365 [2022-07-23 05:31:51,502 INFO L226 Difference]: Without dead ends: 365 [2022-07-23 05:31:51,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 142 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=276, Invalid=976, Unknown=8, NotChecked=0, Total=1260 [2022-07-23 05:31:51,503 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 257 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:31:51,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 604 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 320 Invalid, 0 Unknown, 254 Unchecked, 0.5s Time] [2022-07-23 05:31:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-23 05:31:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 356. [2022-07-23 05:31:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 326 states have (on average 1.1533742331288344) internal successors, (376), 337 states have internal predecessors, (376), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-23 05:31:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 403 transitions. [2022-07-23 05:31:51,508 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 403 transitions. Word has length 54 [2022-07-23 05:31:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:31:51,508 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 403 transitions. [2022-07-23 05:31:51,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 5.380952380952381) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-23 05:31:51,509 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 403 transitions. [2022-07-23 05:31:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:31:51,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:31:51,509 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] [2022-07-23 05:31:51,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:51,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-07-23 05:31:51,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:51,915 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)] === [2022-07-23 05:31:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:31:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2022-07-23 05:31:51,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 05:31:51,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420304931] [2022-07-23 05:31:51,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:31:51,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 05:31:51,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 05:31:51,917 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 05:31:51,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-07-23 05:31:52,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:31:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:31:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:31:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:31:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:31:54,518 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 [2022-07-23 05:31:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-23 05:31:54,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:31:59,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 05:31:59,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420304931] [2022-07-23 05:31:59,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420304931] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:31:59,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1421995802] [2022-07-23 05:31:59,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:31:59,454 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 05:31:59,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 05:31:59,455 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 05:31:59,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-07-23 05:31:59,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:31:59,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:31:59,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:31:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates...