./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:43:47,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:43:47,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:43:47,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:43:47,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:43:47,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:43:47,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:43:47,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:43:47,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:43:47,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:43:47,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:43:47,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:43:47,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:43:47,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:43:47,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:43:47,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:43:47,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:43:47,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:43:47,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:43:47,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:43:47,257 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:43:47,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:43:47,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:43:47,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:43:47,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:43:47,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:43:47,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:43:47,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:43:47,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:43:47,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:43:47,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:43:47,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:43:47,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:43:47,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:43:47,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:43:47,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:43:47,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:43:47,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:43:47,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:43:47,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:43:47,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:43:47,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:43:47,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-07-21 16:43:47,315 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:43:47,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:43:47,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:43:47,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:43:47,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:43:47,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:43:47,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:43:47,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:43:47,318 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:43:47,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:43:47,319 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:43:47,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:43:47,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:43:47,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:43:47,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:43:47,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:43:47,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:43:47,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:43:47,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:43:47,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:43:47,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:43:47,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:43:47,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:43:47,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:43:47,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:43:47,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:43:47,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:43:47,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:43:47,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:43:47,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-07-21 16:43:47,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:43:47,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:43:47,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:43:47,690 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:43:47,690 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:43:47,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-07-21 16:43:47,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66937fc8/dc018f3aef3e410eb40b1f6ad7887a52/FLAGfb468d702 [2022-07-21 16:43:48,227 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:43:48,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-07-21 16:43:48,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66937fc8/dc018f3aef3e410eb40b1f6ad7887a52/FLAGfb468d702 [2022-07-21 16:43:48,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c66937fc8/dc018f3aef3e410eb40b1f6ad7887a52 [2022-07-21 16:43:48,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:43:48,264 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:43:48,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:43:48,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:43:48,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:43:48,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2a27fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48, skipping insertion in model container [2022-07-21 16:43:48,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:43:48,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:43:48,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:43:48,680 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:43:48,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:43:48,775 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:43:48,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48 WrapperNode [2022-07-21 16:43:48,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:43:48,777 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:43:48,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:43:48,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:43:48,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,821 INFO L137 Inliner]: procedures = 168, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 99 [2022-07-21 16:43:48,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:43:48,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:43:48,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:43:48,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:43:48,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:43:48,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:43:48,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:43:48,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:43:48,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (1/1) ... [2022-07-21 16:43:48,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:43:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:48,883 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) [2022-07-21 16:43:48,895 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 [2022-07-21 16:43:48,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:43:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-21 16:43:48,921 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-21 16:43:48,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 16:43:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:43:48,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:43:49,081 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:43:49,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:43:49,307 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:43:49,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:43:49,313 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 16:43:49,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:49 BoogieIcfgContainer [2022-07-21 16:43:49,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:43:49,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:43:49,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:43:49,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:43:49,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:43:48" (1/3) ... [2022-07-21 16:43:49,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4b7d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:49, skipping insertion in model container [2022-07-21 16:43:49,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:43:48" (2/3) ... [2022-07-21 16:43:49,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4b7d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:43:49, skipping insertion in model container [2022-07-21 16:43:49,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:49" (3/3) ... [2022-07-21 16:43:49,322 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-07-21 16:43:49,338 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:43:49,338 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-21 16:43:49,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:43:49,395 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@6dc1a4e7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1f74a692 [2022-07-21 16:43:49,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-07-21 16:43:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 16:43:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:43:49,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:49,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:43:49,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:49,414 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2022-07-21 16:43:49,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:49,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74935545] [2022-07-21 16:43:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:49,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:49,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:49,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74935545] [2022-07-21 16:43:49,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74935545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:49,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:49,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:43:49,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581419485] [2022-07-21 16:43:49,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:43:49,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:43:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:43:49,701 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:49,851 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2022-07-21 16:43:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:43:49,853 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 [2022-07-21 16:43:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:49,860 INFO L225 Difference]: With dead ends: 134 [2022-07-21 16:43:49,860 INFO L226 Difference]: Without dead ends: 128 [2022-07-21 16:43:49,862 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 [2022-07-21 16:43:49,864 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:49,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 130 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-21 16:43:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2022-07-21 16:43:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 65 states have (on average 1.646153846153846) internal successors, (107), 85 states have internal predecessors, (107), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-21 16:43:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2022-07-21 16:43:49,906 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 6 [2022-07-21 16:43:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:49,906 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2022-07-21 16:43:49,906 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) [2022-07-21 16:43:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2022-07-21 16:43:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:43:49,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:49,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:43:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:43:49,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2022-07-21 16:43:49,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:49,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808994441] [2022-07-21 16:43:49,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:50,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:50,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808994441] [2022-07-21 16:43:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808994441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:50,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:50,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740880391] [2022-07-21 16:43:50,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:50,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:43:50,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:50,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:43:50,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:43:50,028 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:50,133 INFO L93 Difference]: Finished difference Result 222 states and 302 transitions. [2022-07-21 16:43:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:43:50,134 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 [2022-07-21 16:43:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:50,136 INFO L225 Difference]: With dead ends: 222 [2022-07-21 16:43:50,136 INFO L226 Difference]: Without dead ends: 222 [2022-07-21 16:43:50,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:43:50,138 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 138 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:50,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 212 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-21 16:43:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 169. [2022-07-21 16:43:50,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.6641221374045803) internal successors, (218), 151 states have internal predecessors, (218), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 16:43:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 263 transitions. [2022-07-21 16:43:50,170 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 263 transitions. Word has length 6 [2022-07-21 16:43:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:50,171 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 263 transitions. [2022-07-21 16:43:50,172 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) [2022-07-21 16:43:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 263 transitions. [2022-07-21 16:43:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:43:50,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:50,174 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:50,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:43:50,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2022-07-21 16:43:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:50,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771504628] [2022-07-21 16:43:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:50,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:50,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:50,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771504628] [2022-07-21 16:43:50,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771504628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:50,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:50,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689192447] [2022-07-21 16:43:50,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:50,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:43:50,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:43:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:43:50,300 INFO L87 Difference]: Start difference. First operand 169 states and 263 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:50,437 INFO L93 Difference]: Finished difference Result 260 states and 371 transitions. [2022-07-21 16:43:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:43:50,437 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 [2022-07-21 16:43:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:50,440 INFO L225 Difference]: With dead ends: 260 [2022-07-21 16:43:50,440 INFO L226 Difference]: Without dead ends: 260 [2022-07-21 16:43:50,440 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 [2022-07-21 16:43:50,441 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:50,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 189 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-21 16:43:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2022-07-21 16:43:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6492537313432836) internal successors, (221), 154 states have internal predecessors, (221), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 16:43:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 266 transitions. [2022-07-21 16:43:50,465 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 266 transitions. Word has length 7 [2022-07-21 16:43:50,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:50,466 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 266 transitions. [2022-07-21 16:43:50,466 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) [2022-07-21 16:43:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 266 transitions. [2022-07-21 16:43:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:43:50,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:50,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:43:50,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2022-07-21 16:43:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:50,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457403531] [2022-07-21 16:43:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:50,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:50,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457403531] [2022-07-21 16:43:50,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457403531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:50,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:50,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:50,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655781292] [2022-07-21 16:43:50,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:50,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:43:50,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:43:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:43:50,635 INFO L87 Difference]: Start difference. First operand 172 states and 266 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:50,733 INFO L93 Difference]: Finished difference Result 224 states and 303 transitions. [2022-07-21 16:43:50,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:43:50,733 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 [2022-07-21 16:43:50,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:50,736 INFO L225 Difference]: With dead ends: 224 [2022-07-21 16:43:50,736 INFO L226 Difference]: Without dead ends: 224 [2022-07-21 16:43:50,737 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 [2022-07-21 16:43:50,745 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 139 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:50,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 208 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:50,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-21 16:43:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 172. [2022-07-21 16:43:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 134 states have (on average 1.6343283582089552) internal successors, (219), 154 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 16:43:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 264 transitions. [2022-07-21 16:43:50,758 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 264 transitions. Word has length 8 [2022-07-21 16:43:50,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:50,764 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 264 transitions. [2022-07-21 16:43:50,767 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) [2022-07-21 16:43:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 264 transitions. [2022-07-21 16:43:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:43:50,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:50,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:50,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:43:50,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2022-07-21 16:43:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:50,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756181376] [2022-07-21 16:43:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:50,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756181376] [2022-07-21 16:43:50,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756181376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:50,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:50,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:50,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875633822] [2022-07-21 16:43:50,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:50,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:43:50,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:50,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:43:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:43:50,849 INFO L87 Difference]: Start difference. First operand 172 states and 264 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:50,947 INFO L93 Difference]: Finished difference Result 266 states and 366 transitions. [2022-07-21 16:43:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:43:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-21 16:43:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:50,949 INFO L225 Difference]: With dead ends: 266 [2022-07-21 16:43:50,949 INFO L226 Difference]: Without dead ends: 266 [2022-07-21 16:43:50,950 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 [2022-07-21 16:43:50,950 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:50,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 207 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-21 16:43:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 205. [2022-07-21 16:43:50,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 165 states have (on average 1.606060606060606) internal successors, (265), 186 states have internal predecessors, (265), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 16:43:50,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 310 transitions. [2022-07-21 16:43:50,962 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 310 transitions. Word has length 9 [2022-07-21 16:43:50,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:50,963 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 310 transitions. [2022-07-21 16:43:50,963 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) [2022-07-21 16:43:50,964 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 310 transitions. [2022-07-21 16:43:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:43:50,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:50,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:43:50,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:50,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2022-07-21 16:43:50,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:50,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510102781] [2022-07-21 16:43:50,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:50,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:51,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510102781] [2022-07-21 16:43:51,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510102781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:51,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:51,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701630931] [2022-07-21 16:43:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:43:51,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:43:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:43:51,025 INFO L87 Difference]: Start difference. First operand 205 states and 310 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:51,098 INFO L93 Difference]: Finished difference Result 253 states and 333 transitions. [2022-07-21 16:43:51,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:43:51,099 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 [2022-07-21 16:43:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:51,100 INFO L225 Difference]: With dead ends: 253 [2022-07-21 16:43:51,100 INFO L226 Difference]: Without dead ends: 253 [2022-07-21 16:43:51,101 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 [2022-07-21 16:43:51,105 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:51,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 235 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-21 16:43:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 219. [2022-07-21 16:43:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 178 states have (on average 1.6067415730337078) internal successors, (286), 200 states have internal predecessors, (286), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-21 16:43:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 331 transitions. [2022-07-21 16:43:51,114 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 331 transitions. Word has length 10 [2022-07-21 16:43:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:51,114 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 331 transitions. [2022-07-21 16:43:51,114 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) [2022-07-21 16:43:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 331 transitions. [2022-07-21 16:43:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:43:51,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:51,115 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:51,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:43:51,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2022-07-21 16:43:51,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:51,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458540786] [2022-07-21 16:43:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458540786] [2022-07-21 16:43:51,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458540786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:51,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096072929] [2022-07-21 16:43:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:51,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:51,211 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) [2022-07-21 16:43:51,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:43:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:51,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:43:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:51,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:43:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096072929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:43:51,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:43:51,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-07-21 16:43:51,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614274288] [2022-07-21 16:43:51,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:43:51,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:43:51,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:43:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:43:51,571 INFO L87 Difference]: Start difference. First operand 219 states and 331 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:51,823 INFO L93 Difference]: Finished difference Result 291 states and 398 transitions. [2022-07-21 16:43:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:43:51,824 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 [2022-07-21 16:43:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:51,826 INFO L225 Difference]: With dead ends: 291 [2022-07-21 16:43:51,826 INFO L226 Difference]: Without dead ends: 291 [2022-07-21 16:43:51,826 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 [2022-07-21 16:43:51,827 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 469 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:51,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 489 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:43:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-07-21 16:43:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 225. [2022-07-21 16:43:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 183 states have (on average 1.540983606557377) internal successors, (282), 206 states have internal predecessors, (282), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2022-07-21 16:43:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 332 transitions. [2022-07-21 16:43:51,835 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 332 transitions. Word has length 14 [2022-07-21 16:43:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:51,835 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 332 transitions. [2022-07-21 16:43:51,835 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) [2022-07-21 16:43:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 332 transitions. [2022-07-21 16:43:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 16:43:51,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:51,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:51,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:52,059 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 [2022-07-21 16:43:52,059 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:52,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2022-07-21 16:43:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055469436] [2022-07-21 16:43:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:52,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:52,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055469436] [2022-07-21 16:43:52,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055469436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:52,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903845839] [2022-07-21 16:43:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:52,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:52,169 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) [2022-07-21 16:43:52,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:43:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:52,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 16:43:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:52,316 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 [2022-07-21 16:43:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:52,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:43:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:52,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903845839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:43:52,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:43:52,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-21 16:43:52,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81059449] [2022-07-21 16:43:52,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:43:52,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:43:52,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:43:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:43:52,394 INFO L87 Difference]: Start difference. First operand 225 states and 332 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:52,647 INFO L93 Difference]: Finished difference Result 336 states and 471 transitions. [2022-07-21 16:43:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:43:52,648 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 [2022-07-21 16:43:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:52,650 INFO L225 Difference]: With dead ends: 336 [2022-07-21 16:43:52,650 INFO L226 Difference]: Without dead ends: 336 [2022-07-21 16:43:52,650 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 [2022-07-21 16:43:52,651 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 428 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:52,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 317 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:43:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-21 16:43:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 239. [2022-07-21 16:43:52,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 194 states have (on average 1.5257731958762886) internal successors, (296), 220 states have internal predecessors, (296), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2022-07-21 16:43:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2022-07-21 16:43:52,660 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 15 [2022-07-21 16:43:52,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:52,660 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2022-07-21 16:43:52,661 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) [2022-07-21 16:43:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2022-07-21 16:43:52,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:43:52,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:52,661 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:52,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:52,875 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 [2022-07-21 16:43:52,876 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:52,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2022-07-21 16:43:52,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:52,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863720876] [2022-07-21 16:43:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:52,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:52,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863720876] [2022-07-21 16:43:52,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863720876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171846572] [2022-07-21 16:43:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:53,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:53,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:53,002 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) [2022-07-21 16:43:53,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:43:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 16:43:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:53,211 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 [2022-07-21 16:43:53,220 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 [2022-07-21 16:43:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:53,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:43:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:53,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171846572] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:43:53,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:43:53,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-07-21 16:43:53,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357848658] [2022-07-21 16:43:53,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:43:53,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 16:43:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 16:43:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:43:53,344 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:53,985 INFO L93 Difference]: Finished difference Result 550 states and 739 transitions. [2022-07-21 16:43:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 16:43:53,987 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 [2022-07-21 16:43:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:53,989 INFO L225 Difference]: With dead ends: 550 [2022-07-21 16:43:53,989 INFO L226 Difference]: Without dead ends: 550 [2022-07-21 16:43:53,990 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 [2022-07-21 16:43:53,990 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 433 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:53,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1026 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:43:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-21 16:43:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2022-07-21 16:43:54,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 1.5536332179930796) internal successors, (449), 320 states have internal predecessors, (449), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2022-07-21 16:43:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2022-07-21 16:43:54,008 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 16 [2022-07-21 16:43:54,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:54,008 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2022-07-21 16:43:54,009 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) [2022-07-21 16:43:54,009 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2022-07-21 16:43:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:43:54,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:54,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:54,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:54,223 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 [2022-07-21 16:43:54,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2022-07-21 16:43:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:54,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549180677] [2022-07-21 16:43:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:54,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549180677] [2022-07-21 16:43:54,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549180677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:54,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:54,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 16:43:54,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223698559] [2022-07-21 16:43:54,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:54,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:43:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:54,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:43:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:43:54,254 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:54,273 INFO L93 Difference]: Finished difference Result 495 states and 752 transitions. [2022-07-21 16:43:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:43:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:43:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:54,278 INFO L225 Difference]: With dead ends: 495 [2022-07-21 16:43:54,279 INFO L226 Difference]: Without dead ends: 495 [2022-07-21 16:43:54,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:43:54,279 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:54,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 117 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:43:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-21 16:43:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 479. [2022-07-21 16:43:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 409 states have (on average 1.5574572127139363) internal successors, (637), 445 states have internal predecessors, (637), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2022-07-21 16:43:54,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 747 transitions. [2022-07-21 16:43:54,297 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 747 transitions. Word has length 18 [2022-07-21 16:43:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:54,297 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 747 transitions. [2022-07-21 16:43:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 747 transitions. [2022-07-21 16:43:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:43:54,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:54,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:43:54,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2022-07-21 16:43:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228811022] [2022-07-21 16:43:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:54,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:54,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228811022] [2022-07-21 16:43:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228811022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:54,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:54,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:43:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114336780] [2022-07-21 16:43:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:54,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:43:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:43:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:43:54,338 INFO L87 Difference]: Start difference. First operand 479 states and 747 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:54,344 INFO L93 Difference]: Finished difference Result 441 states and 681 transitions. [2022-07-21 16:43:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:43:54,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:43:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:54,346 INFO L225 Difference]: With dead ends: 441 [2022-07-21 16:43:54,347 INFO L226 Difference]: Without dead ends: 441 [2022-07-21 16:43:54,347 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 [2022-07-21 16:43:54,348 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:54,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 114 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:43:54,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-07-21 16:43:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2022-07-21 16:43:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 377 states have (on average 1.5145888594164456) internal successors, (571), 407 states have internal predecessors, (571), 19 states have call successors, (19), 14 states have call predecessors, (19), 30 states have return successors, (91), 19 states have call predecessors, (91), 19 states have call successors, (91) [2022-07-21 16:43:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 681 transitions. [2022-07-21 16:43:54,365 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 681 transitions. Word has length 18 [2022-07-21 16:43:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:54,365 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 681 transitions. [2022-07-21 16:43:54,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 681 transitions. [2022-07-21 16:43:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 16:43:54,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:54,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:54,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:43:54,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2022-07-21 16:43:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:54,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233678014] [2022-07-21 16:43:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:54,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233678014] [2022-07-21 16:43:54,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233678014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:54,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 16:43:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87148872] [2022-07-21 16:43:54,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:54,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:43:54,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:54,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:43:54,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:43:54,399 INFO L87 Difference]: Start difference. First operand 441 states and 681 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:54,427 INFO L93 Difference]: Finished difference Result 509 states and 761 transitions. [2022-07-21 16:43:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:43:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 16:43:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:54,430 INFO L225 Difference]: With dead ends: 509 [2022-07-21 16:43:54,430 INFO L226 Difference]: Without dead ends: 509 [2022-07-21 16:43:54,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:43:54,431 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:54,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:43:54,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-07-21 16:43:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 491. [2022-07-21 16:43:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 424 states have (on average 1.5047169811320755) internal successors, (638), 455 states have internal predecessors, (638), 20 states have call successors, (20), 15 states have call predecessors, (20), 32 states have return successors, (94), 20 states have call predecessors, (94), 20 states have call successors, (94) [2022-07-21 16:43:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 752 transitions. [2022-07-21 16:43:54,447 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 752 transitions. Word has length 19 [2022-07-21 16:43:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:54,448 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 752 transitions. [2022-07-21 16:43:54,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:43:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 752 transitions. [2022-07-21 16:43:54,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:43:54,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:54,449 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] [2022-07-21 16:43:54,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 16:43:54,449 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2022-07-21 16:43:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915965622] [2022-07-21 16:43:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915965622] [2022-07-21 16:43:54,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915965622] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:54,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:54,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:43:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860473917] [2022-07-21 16:43:54,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:43:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:43:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:43:54,489 INFO L87 Difference]: Start difference. First operand 491 states and 752 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:43:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:54,545 INFO L93 Difference]: Finished difference Result 351 states and 521 transitions. [2022-07-21 16:43:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:43:54,546 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 [2022-07-21 16:43:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:54,547 INFO L225 Difference]: With dead ends: 351 [2022-07-21 16:43:54,547 INFO L226 Difference]: Without dead ends: 351 [2022-07-21 16:43:54,548 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 [2022-07-21 16:43:54,548 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:54,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 66 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-21 16:43:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-07-21 16:43:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 299 states have (on average 1.4782608695652173) internal successors, (442), 324 states have internal predecessors, (442), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2022-07-21 16:43:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 521 transitions. [2022-07-21 16:43:54,559 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 521 transitions. Word has length 25 [2022-07-21 16:43:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:54,559 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 521 transitions. [2022-07-21 16:43:54,560 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) [2022-07-21 16:43:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 521 transitions. [2022-07-21 16:43:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:43:54,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:54,561 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] [2022-07-21 16:43:54,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 16:43:54,561 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:54,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:54,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2022-07-21 16:43:54,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:54,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209314936] [2022-07-21 16:43:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209314936] [2022-07-21 16:43:54,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209314936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:54,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166748305] [2022-07-21 16:43:54,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:54,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:54,736 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) [2022-07-21 16:43:54,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:43:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:43:54,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:43:55,030 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 [2022-07-21 16:43:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:55,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:43:55,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166748305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:55,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:43:55,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-21 16:43:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079118532] [2022-07-21 16:43:55,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:43:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 16:43:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 16:43:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:43:55,200 INFO L87 Difference]: Start difference. First operand 351 states and 521 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:43:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:55,911 INFO L93 Difference]: Finished difference Result 531 states and 739 transitions. [2022-07-21 16:43:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:43:55,911 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 [2022-07-21 16:43:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:55,914 INFO L225 Difference]: With dead ends: 531 [2022-07-21 16:43:55,914 INFO L226 Difference]: Without dead ends: 531 [2022-07-21 16:43:55,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:43:55,915 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 498 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:55,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 376 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2022-07-21 16:43:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-21 16:43:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 452. [2022-07-21 16:43:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 391 states have (on average 1.4757033248081841) internal successors, (577), 420 states have internal predecessors, (577), 17 states have call successors, (17), 14 states have call predecessors, (17), 29 states have return successors, (72), 17 states have call predecessors, (72), 17 states have call successors, (72) [2022-07-21 16:43:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 666 transitions. [2022-07-21 16:43:55,928 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 666 transitions. Word has length 27 [2022-07-21 16:43:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:55,929 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 666 transitions. [2022-07-21 16:43:55,929 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) [2022-07-21 16:43:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 666 transitions. [2022-07-21 16:43:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:43:55,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:55,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:55,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:56,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:56,145 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:56,146 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2022-07-21 16:43:56,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:56,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905030491] [2022-07-21 16:43:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:56,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:56,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905030491] [2022-07-21 16:43:56,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905030491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071105805] [2022-07-21 16:43:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:56,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:56,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:56,255 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) [2022-07-21 16:43:56,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:43:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:56,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:43:56,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:56,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:43:56,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071105805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:56,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:43:56,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2022-07-21 16:43:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283812302] [2022-07-21 16:43:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:56,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:43:56,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:43:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:43:56,456 INFO L87 Difference]: Start difference. First operand 452 states and 666 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:43:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:56,556 INFO L93 Difference]: Finished difference Result 566 states and 816 transitions. [2022-07-21 16:43:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:43:56,559 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 [2022-07-21 16:43:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:56,562 INFO L225 Difference]: With dead ends: 566 [2022-07-21 16:43:56,562 INFO L226 Difference]: Without dead ends: 566 [2022-07-21 16:43:56,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:43:56,563 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 115 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:56,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 164 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-21 16:43:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 473. [2022-07-21 16:43:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 416 states have (on average 1.4615384615384615) internal successors, (608), 441 states have internal predecessors, (608), 17 states have call successors, (17), 14 states have call predecessors, (17), 25 states have return successors, (68), 17 states have call predecessors, (68), 17 states have call successors, (68) [2022-07-21 16:43:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 693 transitions. [2022-07-21 16:43:56,578 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 693 transitions. Word has length 28 [2022-07-21 16:43:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:56,578 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 693 transitions. [2022-07-21 16:43:56,579 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) [2022-07-21 16:43:56,579 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 693 transitions. [2022-07-21 16:43:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 16:43:56,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:56,580 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] [2022-07-21 16:43:56,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:56,795 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,SelfDestructingSolverStorable14 [2022-07-21 16:43:56,796 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2022-07-21 16:43:56,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739717958] [2022-07-21 16:43:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:57,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739717958] [2022-07-21 16:43:57,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739717958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:57,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254114688] [2022-07-21 16:43:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:57,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:57,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:57,104 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) [2022-07-21 16:43:57,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:43:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 16:43:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:43:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:43:57,467 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 [2022-07-21 16:43:57,547 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 [2022-07-21 16:43:57,550 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 [2022-07-21 16:43:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:57,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:43:57,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254114688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:57,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:43:57,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-21 16:43:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780235926] [2022-07-21 16:43:57,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:43:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 16:43:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 16:43:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:43:57,704 INFO L87 Difference]: Start difference. First operand 473 states and 693 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:43:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:59,207 INFO L93 Difference]: Finished difference Result 871 states and 1165 transitions. [2022-07-21 16:43:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-21 16:43:59,207 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 [2022-07-21 16:43:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:59,211 INFO L225 Difference]: With dead ends: 871 [2022-07-21 16:43:59,211 INFO L226 Difference]: Without dead ends: 871 [2022-07-21 16:43:59,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=523, Invalid=2027, Unknown=0, NotChecked=0, Total=2550 [2022-07-21 16:43:59,212 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 891 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:59,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 297 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 553 Invalid, 0 Unknown, 158 Unchecked, 0.5s Time] [2022-07-21 16:43:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-21 16:43:59,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 637. [2022-07-21 16:43:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 570 states have (on average 1.4649122807017543) internal successors, (835), 596 states have internal predecessors, (835), 21 states have call successors, (21), 19 states have call predecessors, (21), 31 states have return successors, (80), 21 states have call predecessors, (80), 21 states have call successors, (80) [2022-07-21 16:43:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 936 transitions. [2022-07-21 16:43:59,235 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 936 transitions. Word has length 29 [2022-07-21 16:43:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:59,236 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 936 transitions. [2022-07-21 16:43:59,236 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) [2022-07-21 16:43:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 936 transitions. [2022-07-21 16:43:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:43:59,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:59,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:43:59,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:43:59,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 16:43:59,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1182683565, now seen corresponding path program 1 times [2022-07-21 16:43:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:59,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123442882] [2022-07-21 16:43:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:59,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:59,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123442882] [2022-07-21 16:43:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123442882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:43:59,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:43:59,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:43:59,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443115065] [2022-07-21 16:43:59,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:43:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:43:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:43:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:43:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:43:59,550 INFO L87 Difference]: Start difference. First operand 637 states and 936 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:43:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:43:59,704 INFO L93 Difference]: Finished difference Result 585 states and 816 transitions. [2022-07-21 16:43:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:43:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-21 16:43:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:43:59,707 INFO L225 Difference]: With dead ends: 585 [2022-07-21 16:43:59,707 INFO L226 Difference]: Without dead ends: 585 [2022-07-21 16:43:59,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:43:59,708 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:43:59,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 114 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:43:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-07-21 16:43:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 560. [2022-07-21 16:43:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 503 states have (on average 1.4532803180914513) internal successors, (731), 531 states have internal predecessors, (731), 15 states have call successors, (15), 13 states have call predecessors, (15), 27 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2022-07-21 16:43:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 796 transitions. [2022-07-21 16:43:59,725 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 796 transitions. Word has length 30 [2022-07-21 16:43:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:43:59,725 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 796 transitions. [2022-07-21 16:43:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:43:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 796 transitions. [2022-07-21 16:43:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:43:59,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:43:59,726 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, 1, 1] [2022-07-21 16:43:59,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:43:59,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:43:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:43:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2022-07-21 16:43:59,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:43:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530885287] [2022-07-21 16:43:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:59,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:43:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:43:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:43:59,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:43:59,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530885287] [2022-07-21 16:43:59,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530885287] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:43:59,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949612638] [2022-07-21 16:43:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:43:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:43:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:43:59,836 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) [2022-07-21 16:43:59,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:43:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:43:59,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:43:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:00,012 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:00,013 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 [2022-07-21 16:44:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:00,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:00,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949612638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:00,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:00,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2022-07-21 16:44:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108833825] [2022-07-21 16:44:00,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 16:44:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:00,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 16:44:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:44:00,092 INFO L87 Difference]: Start difference. First operand 560 states and 796 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:00,404 INFO L93 Difference]: Finished difference Result 679 states and 905 transitions. [2022-07-21 16:44:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:44:00,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-21 16:44:00,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:00,407 INFO L225 Difference]: With dead ends: 679 [2022-07-21 16:44:00,407 INFO L226 Difference]: Without dead ends: 679 [2022-07-21 16:44:00,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:00,408 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 324 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:00,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 179 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 292 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-07-21 16:44:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-07-21 16:44:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 611. [2022-07-21 16:44:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 552 states have (on average 1.4257246376811594) internal successors, (787), 580 states have internal predecessors, (787), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (50), 15 states have call predecessors, (50), 15 states have call successors, (50) [2022-07-21 16:44:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 852 transitions. [2022-07-21 16:44:00,422 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 852 transitions. Word has length 30 [2022-07-21 16:44:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:00,423 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 852 transitions. [2022-07-21 16:44:00,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 852 transitions. [2022-07-21 16:44:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 16:44:00,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:00,423 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, 1, 1] [2022-07-21 16:44:00,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:00,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:00,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2022-07-21 16:44:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:00,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111052427] [2022-07-21 16:44:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:00,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111052427] [2022-07-21 16:44:00,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111052427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:00,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541773787] [2022-07-21 16:44:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:00,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:00,765 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) [2022-07-21 16:44:00,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:44:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 16:44:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:00,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:00,972 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 [2022-07-21 16:44:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:01,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:01,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541773787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:01,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:01,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2022-07-21 16:44:01,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197415367] [2022-07-21 16:44:01,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:01,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:44:01,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:01,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:44:01,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:44:01,121 INFO L87 Difference]: Start difference. First operand 611 states and 852 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:44:01,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:01,614 INFO L93 Difference]: Finished difference Result 725 states and 940 transitions. [2022-07-21 16:44:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:44:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-07-21 16:44:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:01,617 INFO L225 Difference]: With dead ends: 725 [2022-07-21 16:44:01,617 INFO L226 Difference]: Without dead ends: 725 [2022-07-21 16:44:01,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:44:01,618 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 486 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:01,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 237 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 349 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-21 16:44:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-07-21 16:44:01,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 654. [2022-07-21 16:44:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.4131534569983137) internal successors, (838), 623 states have internal predecessors, (838), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2022-07-21 16:44:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 902 transitions. [2022-07-21 16:44:01,634 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 902 transitions. Word has length 31 [2022-07-21 16:44:01,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:01,634 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 902 transitions. [2022-07-21 16:44:01,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 10 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:44:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 902 transitions. [2022-07-21 16:44:01,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 16:44:01,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:01,635 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] [2022-07-21 16:44:01,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:01,851 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:01,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2022-07-21 16:44:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:01,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324608889] [2022-07-21 16:44:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:02,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:02,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324608889] [2022-07-21 16:44:02,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324608889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716094640] [2022-07-21 16:44:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:02,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:02,031 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) [2022-07-21 16:44:02,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:44:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-21 16:44:02,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:02,288 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 [2022-07-21 16:44:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:02,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:02,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716094640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:02,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:02,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-21 16:44:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312212168] [2022-07-21 16:44:02,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 16:44:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:02,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 16:44:02,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:02,533 INFO L87 Difference]: Start difference. First operand 654 states and 902 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:44:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:03,241 INFO L93 Difference]: Finished difference Result 699 states and 917 transitions. [2022-07-21 16:44:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 16:44:03,242 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 [2022-07-21 16:44:03,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:03,244 INFO L225 Difference]: With dead ends: 699 [2022-07-21 16:44:03,244 INFO L226 Difference]: Without dead ends: 699 [2022-07-21 16:44:03,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:44:03,245 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 541 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:03,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 268 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 467 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2022-07-21 16:44:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-21 16:44:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 654. [2022-07-21 16:44:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 593 states have (on average 1.391231028667791) internal successors, (825), 623 states have internal predecessors, (825), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (49), 15 states have call predecessors, (49), 15 states have call successors, (49) [2022-07-21 16:44:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 889 transitions. [2022-07-21 16:44:03,259 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 889 transitions. Word has length 35 [2022-07-21 16:44:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:03,259 INFO L495 AbstractCegarLoop]: Abstraction has 654 states and 889 transitions. [2022-07-21 16:44:03,259 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) [2022-07-21 16:44:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 889 transitions. [2022-07-21 16:44:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 16:44:03,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:03,260 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:03,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:03,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:03,484 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:03,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:03,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2022-07-21 16:44:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:03,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941006641] [2022-07-21 16:44:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 16:44:03,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:03,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941006641] [2022-07-21 16:44:03,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941006641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:03,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570059352] [2022-07-21 16:44:03,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:03,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:03,571 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) [2022-07-21 16:44:03,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:44:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:03,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:44:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:03,791 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:03,792 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 [2022-07-21 16:44:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 16:44:03,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:03,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-07-21 16:44:03,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-07-21 16:44:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 16:44:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570059352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:04,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:04,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2022-07-21 16:44:04,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365313494] [2022-07-21 16:44:04,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 16:44:04,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:04,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 16:44:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:44:04,022 INFO L87 Difference]: Start difference. First operand 654 states and 889 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 16:44:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:04,506 INFO L93 Difference]: Finished difference Result 724 states and 942 transitions. [2022-07-21 16:44:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:44:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-07-21 16:44:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:04,509 INFO L225 Difference]: With dead ends: 724 [2022-07-21 16:44:04,509 INFO L226 Difference]: Without dead ends: 724 [2022-07-21 16:44:04,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=268, Invalid=602, Unknown=0, NotChecked=0, Total=870 [2022-07-21 16:44:04,512 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 412 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:04,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 205 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 406 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-07-21 16:44:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-21 16:44:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 664. [2022-07-21 16:44:04,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.3867768595041323) internal successors, (839), 633 states have internal predecessors, (839), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-07-21 16:44:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 899 transitions. [2022-07-21 16:44:04,527 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 899 transitions. Word has length 36 [2022-07-21 16:44:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:04,527 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 899 transitions. [2022-07-21 16:44:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 16:44:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 899 transitions. [2022-07-21 16:44:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 16:44:04,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:04,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:04,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 16:44:04,755 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:04,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash 45027747, now seen corresponding path program 1 times [2022-07-21 16:44:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:04,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967504139] [2022-07-21 16:44:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:04,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:04,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967504139] [2022-07-21 16:44:04,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967504139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:04,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788997813] [2022-07-21 16:44:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:04,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:04,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:04,981 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) [2022-07-21 16:44:05,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:44:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 16:44:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:05,322 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 [2022-07-21 16:44:05,384 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 [2022-07-21 16:44:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 16:44:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:05,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788997813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:05,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:05,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-07-21 16:44:05,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820715935] [2022-07-21 16:44:05,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:05,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:44:05,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:44:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:44:05,484 INFO L87 Difference]: Start difference. First operand 664 states and 899 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:44:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:06,546 INFO L93 Difference]: Finished difference Result 561 states and 698 transitions. [2022-07-21 16:44:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 16:44:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-07-21 16:44:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:06,550 INFO L225 Difference]: With dead ends: 561 [2022-07-21 16:44:06,550 INFO L226 Difference]: Without dead ends: 561 [2022-07-21 16:44:06,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2022-07-21 16:44:06,551 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 682 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:06,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 341 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 643 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-07-21 16:44:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-21 16:44:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 385. [2022-07-21 16:44:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 346 states have (on average 1.3757225433526012) internal successors, (476), 366 states have internal predecessors, (476), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-21 16:44:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 506 transitions. [2022-07-21 16:44:06,565 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 506 transitions. Word has length 37 [2022-07-21 16:44:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:06,566 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 506 transitions. [2022-07-21 16:44:06,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:44:06,566 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 506 transitions. [2022-07-21 16:44:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:44:06,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:06,566 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] [2022-07-21 16:44:06,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:06,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 16:44:06,790 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:06,791 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2022-07-21 16:44:06,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:06,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329237453] [2022-07-21 16:44:06,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:06,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:06,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329237453] [2022-07-21 16:44:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329237453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:06,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273981258] [2022-07-21 16:44:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:06,845 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) [2022-07-21 16:44:06,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:44:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:44:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:06,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:06,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273981258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:06,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:06,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-21 16:44:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483565089] [2022-07-21 16:44:06,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:06,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:06,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:06,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:06,983 INFO L87 Difference]: Start difference. First operand 385 states and 506 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:44:07,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:07,050 INFO L93 Difference]: Finished difference Result 405 states and 521 transitions. [2022-07-21 16:44:07,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:07,051 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 [2022-07-21 16:44:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:07,052 INFO L225 Difference]: With dead ends: 405 [2022-07-21 16:44:07,052 INFO L226 Difference]: Without dead ends: 405 [2022-07-21 16:44:07,052 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 [2022-07-21 16:44:07,052 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:07,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:07,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-21 16:44:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 382. [2022-07-21 16:44:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 345 states have (on average 1.3565217391304347) internal successors, (468), 363 states have internal predecessors, (468), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-21 16:44:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 498 transitions. [2022-07-21 16:44:07,059 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 498 transitions. Word has length 40 [2022-07-21 16:44:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:07,060 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 498 transitions. [2022-07-21 16:44:07,060 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) [2022-07-21 16:44:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 498 transitions. [2022-07-21 16:44:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 16:44:07,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:07,060 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] [2022-07-21 16:44:07,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:07,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 16:44:07,276 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:07,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2022-07-21 16:44:07,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:07,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700158418] [2022-07-21 16:44:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:07,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:07,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700158418] [2022-07-21 16:44:07,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700158418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:07,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739618225] [2022-07-21 16:44:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:07,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:07,338 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) [2022-07-21 16:44:07,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:44:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:44:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:07,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:07,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739618225] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:07,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:07,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-21 16:44:07,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609445323] [2022-07-21 16:44:07,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:07,502 INFO L87 Difference]: Start difference. First operand 382 states and 498 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:44:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:07,583 INFO L93 Difference]: Finished difference Result 402 states and 512 transitions. [2022-07-21 16:44:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:07,584 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 [2022-07-21 16:44:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:07,585 INFO L225 Difference]: With dead ends: 402 [2022-07-21 16:44:07,585 INFO L226 Difference]: Without dead ends: 402 [2022-07-21 16:44:07,585 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 [2022-07-21 16:44:07,586 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:07,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 43 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-21 16:44:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 380. [2022-07-21 16:44:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 345 states have (on average 1.3333333333333333) internal successors, (460), 361 states have internal predecessors, (460), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-21 16:44:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 490 transitions. [2022-07-21 16:44:07,593 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 490 transitions. Word has length 41 [2022-07-21 16:44:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:07,593 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 490 transitions. [2022-07-21 16:44:07,593 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) [2022-07-21 16:44:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 490 transitions. [2022-07-21 16:44:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:44:07,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:07,594 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] [2022-07-21 16:44:07,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:07,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-21 16:44:07,807 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2022-07-21 16:44:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138648199] [2022-07-21 16:44:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:07,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138648199] [2022-07-21 16:44:07,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138648199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:07,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609921776] [2022-07-21 16:44:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:07,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:07,865 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) [2022-07-21 16:44:07,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:44:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:44:07,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:07,942 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 [2022-07-21 16:44:07,979 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:07,979 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 [2022-07-21 16:44:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:07,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:08,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609921776] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:08,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:08,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-21 16:44:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111870552] [2022-07-21 16:44:08,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:44:08,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:44:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:44:08,106 INFO L87 Difference]: Start difference. First operand 380 states and 490 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:08,226 INFO L93 Difference]: Finished difference Result 417 states and 516 transitions. [2022-07-21 16:44:08,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:44:08,226 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 [2022-07-21 16:44:08,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:08,228 INFO L225 Difference]: With dead ends: 417 [2022-07-21 16:44:08,228 INFO L226 Difference]: Without dead ends: 417 [2022-07-21 16:44:08,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:44:08,232 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:08,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 135 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 158 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-07-21 16:44:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-07-21 16:44:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 386. [2022-07-21 16:44:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 351 states have (on average 1.3162393162393162) internal successors, (462), 367 states have internal predecessors, (462), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-21 16:44:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 492 transitions. [2022-07-21 16:44:08,245 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 492 transitions. Word has length 42 [2022-07-21 16:44:08,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:08,245 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 492 transitions. [2022-07-21 16:44:08,246 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) [2022-07-21 16:44:08,246 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 492 transitions. [2022-07-21 16:44:08,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 16:44:08,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:08,246 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] [2022-07-21 16:44:08,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:08,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:08,468 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1366889029, now seen corresponding path program 1 times [2022-07-21 16:44:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:08,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217877743] [2022-07-21 16:44:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:08,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217877743] [2022-07-21 16:44:08,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217877743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:08,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93722020] [2022-07-21 16:44:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:08,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:08,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:08,512 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) [2022-07-21 16:44:08,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:44:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:44:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:08,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:08,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93722020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:08,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:44:08,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-21 16:44:08,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471738970] [2022-07-21 16:44:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:08,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:08,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:44:08,609 INFO L87 Difference]: Start difference. First operand 386 states and 492 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 16:44:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:08,634 INFO L93 Difference]: Finished difference Result 450 states and 547 transitions. [2022-07-21 16:44:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:08,635 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 [2022-07-21 16:44:08,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:08,636 INFO L225 Difference]: With dead ends: 450 [2022-07-21 16:44:08,636 INFO L226 Difference]: Without dead ends: 450 [2022-07-21 16:44:08,637 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 [2022-07-21 16:44:08,637 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 59 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:08,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 189 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-07-21 16:44:08,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 376. [2022-07-21 16:44:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 341 states have (on average 1.284457478005865) internal successors, (438), 357 states have internal predecessors, (438), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-07-21 16:44:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 468 transitions. [2022-07-21 16:44:08,648 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 468 transitions. Word has length 45 [2022-07-21 16:44:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:08,648 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 468 transitions. [2022-07-21 16:44:08,649 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) [2022-07-21 16:44:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 468 transitions. [2022-07-21 16:44:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:44:08,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:08,649 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] [2022-07-21 16:44:08,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-21 16:44:08,875 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:08,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash -624108164, now seen corresponding path program 1 times [2022-07-21 16:44:08,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:08,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028033868] [2022-07-21 16:44:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:08,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028033868] [2022-07-21 16:44:08,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028033868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273960177] [2022-07-21 16:44:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:08,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:08,984 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) [2022-07-21 16:44:08,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:44:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:09,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:44:09,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:09,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273960177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:09,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:09,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-07-21 16:44:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267027609] [2022-07-21 16:44:09,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:44:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:09,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:44:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:44:09,206 INFO L87 Difference]: Start difference. First operand 376 states and 468 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 16:44:09,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:09,428 INFO L93 Difference]: Finished difference Result 337 states and 403 transitions. [2022-07-21 16:44:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:44:09,429 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 [2022-07-21 16:44:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:09,430 INFO L225 Difference]: With dead ends: 337 [2022-07-21 16:44:09,430 INFO L226 Difference]: Without dead ends: 337 [2022-07-21 16:44:09,430 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 [2022-07-21 16:44:09,432 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 160 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:09,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 144 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-21 16:44:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 324. [2022-07-21 16:44:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.2602739726027397) internal successors, (368), 307 states have internal predecessors, (368), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-21 16:44:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 393 transitions. [2022-07-21 16:44:09,439 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 393 transitions. Word has length 48 [2022-07-21 16:44:09,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:09,440 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 393 transitions. [2022-07-21 16:44:09,440 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) [2022-07-21 16:44:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 393 transitions. [2022-07-21 16:44:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:44:09,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:09,440 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] [2022-07-21 16:44:09,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:09,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 16:44:09,665 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2022-07-21 16:44:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:09,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157168044] [2022-07-21 16:44:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:09,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 16:44:09,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:09,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157168044] [2022-07-21 16:44:09,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157168044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:09,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886170146] [2022-07-21 16:44:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:09,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:09,804 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) [2022-07-21 16:44:09,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:44:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:44:09,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:10,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:10,198 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 [2022-07-21 16:44:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:10,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:10,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886170146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:10,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:10,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-21 16:44:10,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496670193] [2022-07-21 16:44:10,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:10,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 16:44:10,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 16:44:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:44:10,336 INFO L87 Difference]: Start difference. First operand 324 states and 393 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 16:44:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:10,783 INFO L93 Difference]: Finished difference Result 352 states and 407 transitions. [2022-07-21 16:44:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:44:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-21 16:44:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:10,785 INFO L225 Difference]: With dead ends: 352 [2022-07-21 16:44:10,785 INFO L226 Difference]: Without dead ends: 352 [2022-07-21 16:44:10,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:44:10,786 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 344 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:10,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 216 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-07-21 16:44:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-07-21 16:44:10,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 323. [2022-07-21 16:44:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.25) internal successors, (365), 306 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 388 transitions. [2022-07-21 16:44:10,791 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 388 transitions. Word has length 48 [2022-07-21 16:44:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:10,791 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 388 transitions. [2022-07-21 16:44:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 16:44:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 388 transitions. [2022-07-21 16:44:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 16:44:10,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:10,791 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] [2022-07-21 16:44:10,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:10,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 16:44:10,992 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2022-07-21 16:44:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:10,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931887546] [2022-07-21 16:44:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:11,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:44:11,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931887546] [2022-07-21 16:44:11,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931887546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:11,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633206882] [2022-07-21 16:44:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:11,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:11,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:11,276 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) [2022-07-21 16:44:11,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:44:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 16:44:11,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:11,799 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 [2022-07-21 16:44:11,868 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 [2022-07-21 16:44:11,871 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 [2022-07-21 16:44:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:11,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633206882] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:11,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:11,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 18 [2022-07-21 16:44:11,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293504960] [2022-07-21 16:44:11,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:11,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 16:44:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 16:44:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:11,980 INFO L87 Difference]: Start difference. First operand 323 states and 388 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:13,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:13,004 INFO L93 Difference]: Finished difference Result 393 states and 443 transitions. [2022-07-21 16:44:13,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-21 16:44:13,004 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-21 16:44:13,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:13,006 INFO L225 Difference]: With dead ends: 393 [2022-07-21 16:44:13,006 INFO L226 Difference]: Without dead ends: 393 [2022-07-21 16:44:13,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2022-07-21 16:44:13,011 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 514 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:13,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 284 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 575 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-07-21 16:44:13,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-21 16:44:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 323. [2022-07-21 16:44:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2397260273972603) internal successors, (362), 306 states have internal predecessors, (362), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 385 transitions. [2022-07-21 16:44:13,018 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 385 transitions. Word has length 50 [2022-07-21 16:44:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:13,018 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 385 transitions. [2022-07-21 16:44:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 16 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 385 transitions. [2022-07-21 16:44:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:44:13,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:13,019 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] [2022-07-21 16:44:13,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:13,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 16:44:13,235 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2022-07-21 16:44:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:13,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671346575] [2022-07-21 16:44:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:13,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:13,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:13,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671346575] [2022-07-21 16:44:13,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671346575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678592194] [2022-07-21 16:44:13,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:13,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:13,364 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) [2022-07-21 16:44:13,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:44:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:13,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:44:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:13,556 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:13,556 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 [2022-07-21 16:44:13,656 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:13,656 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 [2022-07-21 16:44:13,685 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:13,686 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 [2022-07-21 16:44:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:13,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:13,778 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 16:44:13,778 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 [2022-07-21 16:44:13,912 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 16:44:13,913 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 [2022-07-21 16:44:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:14,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678592194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:14,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:14,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 25 [2022-07-21 16:44:14,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441441803] [2022-07-21 16:44:14,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:14,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 16:44:14,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:14,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 16:44:14,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:44:14,087 INFO L87 Difference]: Start difference. First operand 323 states and 385 transitions. Second operand has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 16:44:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:14,305 INFO L93 Difference]: Finished difference Result 336 states and 397 transitions. [2022-07-21 16:44:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:44:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2022-07-21 16:44:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:14,307 INFO L225 Difference]: With dead ends: 336 [2022-07-21 16:44:14,307 INFO L226 Difference]: Without dead ends: 336 [2022-07-21 16:44:14,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:44:14,309 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 375 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:14,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 60 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 147 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-07-21 16:44:14,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-07-21 16:44:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2022-07-21 16:44:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2328767123287672) internal successors, (360), 305 states have internal predecessors, (360), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 383 transitions. [2022-07-21 16:44:14,315 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 383 transitions. Word has length 51 [2022-07-21 16:44:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:14,315 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 383 transitions. [2022-07-21 16:44:14,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 16:44:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 383 transitions. [2022-07-21 16:44:14,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:44:14,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:14,316 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] [2022-07-21 16:44:14,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:14,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2022-07-21 16:44:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046898514] [2022-07-21 16:44:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:14,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:14,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:14,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046898514] [2022-07-21 16:44:14,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046898514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:14,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376847750] [2022-07-21 16:44:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:14,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:14,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:14,645 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) [2022-07-21 16:44:14,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:44:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:14,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 16:44:14,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:14,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:14,840 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 [2022-07-21 16:44:14,848 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:14,848 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 [2022-07-21 16:44:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:14,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:14,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376847750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:14,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:44:14,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-07-21 16:44:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882437383] [2022-07-21 16:44:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:44:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:44:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:44:14,905 INFO L87 Difference]: Start difference. First operand 322 states and 383 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:15,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:15,043 INFO L93 Difference]: Finished difference Result 371 states and 429 transitions. [2022-07-21 16:44:15,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:44:15,044 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 [2022-07-21 16:44:15,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:15,045 INFO L225 Difference]: With dead ends: 371 [2022-07-21 16:44:15,045 INFO L226 Difference]: Without dead ends: 371 [2022-07-21 16:44:15,045 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 [2022-07-21 16:44:15,046 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 209 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:15,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-21 16:44:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2022-07-21 16:44:15,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2226027397260273) internal successors, (357), 305 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 380 transitions. [2022-07-21 16:44:15,058 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 380 transitions. Word has length 51 [2022-07-21 16:44:15,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:15,059 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 380 transitions. [2022-07-21 16:44:15,059 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) [2022-07-21 16:44:15,059 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 380 transitions. [2022-07-21 16:44:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:44:15,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:15,061 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:15,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:15,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-21 16:44:15,271 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:15,272 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2022-07-21 16:44:15,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:15,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656209534] [2022-07-21 16:44:15,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:15,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:15,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:15,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656209534] [2022-07-21 16:44:15,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656209534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:15,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816803786] [2022-07-21 16:44:15,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:15,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:15,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:15,381 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) [2022-07-21 16:44:15,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:44:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:15,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 16:44:15,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:15,521 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:15,522 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 [2022-07-21 16:44:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:15,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:15,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816803786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:15,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:15,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-07-21 16:44:15,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843191765] [2022-07-21 16:44:15,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:15,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:44:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:15,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:44:15,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:44:15,685 INFO L87 Difference]: Start difference. First operand 322 states and 380 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 16:44:15,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:15,937 INFO L93 Difference]: Finished difference Result 343 states and 396 transitions. [2022-07-21 16:44:15,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:44:15,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-21 16:44:15,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:15,938 INFO L225 Difference]: With dead ends: 343 [2022-07-21 16:44:15,938 INFO L226 Difference]: Without dead ends: 343 [2022-07-21 16:44:15,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-07-21 16:44:15,939 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:15,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 150 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 212 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-07-21 16:44:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-21 16:44:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2022-07-21 16:44:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2157534246575343) internal successors, (355), 305 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:15,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 378 transitions. [2022-07-21 16:44:15,949 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 378 transitions. Word has length 51 [2022-07-21 16:44:15,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:15,949 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 378 transitions. [2022-07-21 16:44:15,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 16:44:15,949 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 378 transitions. [2022-07-21 16:44:15,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:44:15,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:15,950 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:15,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 16:44:16,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:16,163 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:16,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2001887703, now seen corresponding path program 2 times [2022-07-21 16:44:16,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:16,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130771868] [2022-07-21 16:44:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:16,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:16,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:16,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:16,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:16,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130771868] [2022-07-21 16:44:16,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130771868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677876597] [2022-07-21 16:44:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:44:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:16,258 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) [2022-07-21 16:44:16,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:44:16,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:44:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:44:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 16:44:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:16,435 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:16,435 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 [2022-07-21 16:44:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:16,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:16,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677876597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:16,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:16,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2022-07-21 16:44:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062350869] [2022-07-21 16:44:16,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:44:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:44:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:44:16,517 INFO L87 Difference]: Start difference. First operand 322 states and 378 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 16:44:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:16,779 INFO L93 Difference]: Finished difference Result 342 states and 391 transitions. [2022-07-21 16:44:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:44:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2022-07-21 16:44:16,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:16,781 INFO L225 Difference]: With dead ends: 342 [2022-07-21 16:44:16,781 INFO L226 Difference]: Without dead ends: 342 [2022-07-21 16:44:16,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:16,782 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:16,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 169 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-07-21 16:44:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-21 16:44:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 322. [2022-07-21 16:44:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2123287671232876) internal successors, (354), 305 states have internal predecessors, (354), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 377 transitions. [2022-07-21 16:44:16,787 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 377 transitions. Word has length 51 [2022-07-21 16:44:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:16,788 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 377 transitions. [2022-07-21 16:44:16,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 8 states have internal predecessors, (45), 1 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-21 16:44:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 377 transitions. [2022-07-21 16:44:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:44:16,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:16,789 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] [2022-07-21 16:44:16,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:17,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:17,009 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:17,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2022-07-21 16:44:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:17,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717299861] [2022-07-21 16:44:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:17,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:17,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:17,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717299861] [2022-07-21 16:44:17,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717299861] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:17,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729504397] [2022-07-21 16:44:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:17,444 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) [2022-07-21 16:44:17,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:44:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:17,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 16:44:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:17,688 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:17,689 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 [2022-07-21 16:44:17,878 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-21 16:44:17,879 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 [2022-07-21 16:44:17,926 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-21 16:44:17,927 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 [2022-07-21 16:44:18,054 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 [2022-07-21 16:44:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:18,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:18,148 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 16:44:18,148 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 88 treesize of output 81 [2022-07-21 16:44:18,362 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-21 16:44:18,362 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 [2022-07-21 16:44:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:18,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729504397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:18,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:44:18,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2022-07-21 16:44:18,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627581359] [2022-07-21 16:44:18,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 16:44:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:18,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 16:44:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:44:18,610 INFO L87 Difference]: Start difference. First operand 322 states and 377 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-21 16:44:19,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:19,295 INFO L93 Difference]: Finished difference Result 373 states and 428 transitions. [2022-07-21 16:44:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:44:19,295 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 [2022-07-21 16:44:19,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:19,297 INFO L225 Difference]: With dead ends: 373 [2022-07-21 16:44:19,297 INFO L226 Difference]: Without dead ends: 373 [2022-07-21 16:44:19,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=2551, Unknown=0, NotChecked=0, Total=3080 [2022-07-21 16:44:19,298 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 618 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:19,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 246 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 838 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2022-07-21 16:44:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-07-21 16:44:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 322. [2022-07-21 16:44:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.2054794520547945) internal successors, (352), 305 states have internal predecessors, (352), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 375 transitions. [2022-07-21 16:44:19,303 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 375 transitions. Word has length 52 [2022-07-21 16:44:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:19,303 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 375 transitions. [2022-07-21 16:44:19,304 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) [2022-07-21 16:44:19,304 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 375 transitions. [2022-07-21 16:44:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:44:19,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:19,304 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:19,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-21 16:44:19,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:19,523 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:19,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:19,524 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2022-07-21 16:44:19,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:19,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913990815] [2022-07-21 16:44:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:19,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:19,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:19,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:44:19,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913990815] [2022-07-21 16:44:19,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913990815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:19,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341484581] [2022-07-21 16:44:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:19,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:19,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:19,652 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) [2022-07-21 16:44:19,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:44:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:44:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:19,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:19,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-21 16:44:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:44:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341484581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:20,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:20,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2022-07-21 16:44:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227181974] [2022-07-21 16:44:20,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 16:44:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 16:44:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:20,047 INFO L87 Difference]: Start difference. First operand 322 states and 375 transitions. Second operand has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:20,409 INFO L93 Difference]: Finished difference Result 353 states and 395 transitions. [2022-07-21 16:44:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:44:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-07-21 16:44:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:20,410 INFO L225 Difference]: With dead ends: 353 [2022-07-21 16:44:20,410 INFO L226 Difference]: Without dead ends: 353 [2022-07-21 16:44:20,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 16:44:20,411 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 404 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:20,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 244 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 315 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-07-21 16:44:20,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-21 16:44:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 322. [2022-07-21 16:44:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 305 states have internal predecessors, (346), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 369 transitions. [2022-07-21 16:44:20,421 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 369 transitions. Word has length 52 [2022-07-21 16:44:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:20,421 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 369 transitions. [2022-07-21 16:44:20,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.857142857142857) internal successors, (68), 11 states have internal predecessors, (68), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 369 transitions. [2022-07-21 16:44:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:44:20,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:20,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:20,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:20,647 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2022-07-21 16:44:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006129371] [2022-07-21 16:44:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:20,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:20,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-21 16:44:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006129371] [2022-07-21 16:44:20,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006129371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:20,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434596263] [2022-07-21 16:44:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:44:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:20,785 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) [2022-07-21 16:44:20,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:44:20,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:44:20,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:44:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 16:44:20,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:21,022 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 [2022-07-21 16:44:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:21,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434596263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:21,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:21,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2022-07-21 16:44:21,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755433755] [2022-07-21 16:44:21,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:21,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:44:21,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:21,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:44:21,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:44:21,173 INFO L87 Difference]: Start difference. First operand 322 states and 369 transitions. Second operand has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:21,502 INFO L93 Difference]: Finished difference Result 349 states and 389 transitions. [2022-07-21 16:44:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 16:44:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-07-21 16:44:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:21,504 INFO L225 Difference]: With dead ends: 349 [2022-07-21 16:44:21,504 INFO L226 Difference]: Without dead ends: 349 [2022-07-21 16:44:21,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:44:21,505 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 250 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:21,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 235 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 294 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-07-21 16:44:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-07-21 16:44:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 322. [2022-07-21 16:44:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 292 states have (on average 1.178082191780822) internal successors, (344), 305 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 367 transitions. [2022-07-21 16:44:21,510 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 367 transitions. Word has length 52 [2022-07-21 16:44:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:21,511 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 367 transitions. [2022-07-21 16:44:21,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 367 transitions. [2022-07-21 16:44:21,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:44:21,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:21,512 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] [2022-07-21 16:44:21,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:21,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-21 16:44:21,727 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2022-07-21 16:44:21,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:21,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506089601] [2022-07-21 16:44:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:21,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:21,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:21,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:21,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506089601] [2022-07-21 16:44:21,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506089601] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:21,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411784652] [2022-07-21 16:44:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:21,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:21,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:21,956 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) [2022-07-21 16:44:21,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 16:44:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 16:44:22,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:22,113 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:22,113 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 [2022-07-21 16:44:22,220 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-21 16:44:22,220 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 [2022-07-21 16:44:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411784652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:22,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:22,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-07-21 16:44:22,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413365999] [2022-07-21 16:44:22,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 16:44:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 16:44:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-07-21 16:44:22,482 INFO L87 Difference]: Start difference. First operand 322 states and 367 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:22,967 INFO L93 Difference]: Finished difference Result 350 states and 391 transitions. [2022-07-21 16:44:22,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:44:22,968 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 [2022-07-21 16:44:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:22,969 INFO L225 Difference]: With dead ends: 350 [2022-07-21 16:44:22,969 INFO L226 Difference]: Without dead ends: 350 [2022-07-21 16:44:22,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 16:44:22,970 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 247 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:22,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 354 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 322 Invalid, 0 Unknown, 164 Unchecked, 0.1s Time] [2022-07-21 16:44:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-21 16:44:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 321. [2022-07-21 16:44:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1712328767123288) internal successors, (342), 304 states have internal predecessors, (342), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 365 transitions. [2022-07-21 16:44:22,975 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 365 transitions. Word has length 54 [2022-07-21 16:44:22,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:22,975 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 365 transitions. [2022-07-21 16:44:22,975 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) [2022-07-21 16:44:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 365 transitions. [2022-07-21 16:44:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 16:44:22,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:22,976 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:23,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:23,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 16:44:23,191 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:23,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:23,192 INFO L85 PathProgramCache]: Analyzing trace with hash 301474113, now seen corresponding path program 1 times [2022-07-21 16:44:23,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:23,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265203531] [2022-07-21 16:44:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:23,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265203531] [2022-07-21 16:44:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265203531] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275030068] [2022-07-21 16:44:23,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:23,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:23,366 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) [2022-07-21 16:44:23,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 16:44:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:23,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-21 16:44:23,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:23,852 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:23,852 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 [2022-07-21 16:44:23,864 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:23,864 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 [2022-07-21 16:44:23,874 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 7 treesize of output 3 [2022-07-21 16:44:23,876 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 7 treesize of output 3 [2022-07-21 16:44:24,000 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 [2022-07-21 16:44:24,065 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:24,065 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 22 [2022-07-21 16:44:24,073 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:44:24,073 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 19 [2022-07-21 16:44:24,258 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:24,259 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 [2022-07-21 16:44:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:24,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:24,417 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 10 treesize of output 8 [2022-07-21 16:44:24,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275030068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:24,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:24,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2022-07-21 16:44:24,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683705798] [2022-07-21 16:44:24,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 16:44:24,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:24,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 16:44:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:44:24,446 INFO L87 Difference]: Start difference. First operand 321 states and 365 transitions. Second operand has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:25,679 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2022-07-21 16:44:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-21 16:44:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2022-07-21 16:44:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:25,680 INFO L225 Difference]: With dead ends: 348 [2022-07-21 16:44:25,681 INFO L226 Difference]: Without dead ends: 348 [2022-07-21 16:44:25,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=514, Invalid=2908, Unknown=0, NotChecked=0, Total=3422 [2022-07-21 16:44:25,682 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 354 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 633 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:25,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 580 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 610 Invalid, 0 Unknown, 633 Unchecked, 0.3s Time] [2022-07-21 16:44:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-21 16:44:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 321. [2022-07-21 16:44:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.167808219178082) internal successors, (341), 304 states have internal predecessors, (341), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 364 transitions. [2022-07-21 16:44:25,687 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 364 transitions. Word has length 55 [2022-07-21 16:44:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:25,687 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 364 transitions. [2022-07-21 16:44:25,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 4.166666666666667) internal successors, (100), 20 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 364 transitions. [2022-07-21 16:44:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:44:25,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:25,688 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] [2022-07-21 16:44:25,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:25,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 16:44:25,888 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1039811026, now seen corresponding path program 2 times [2022-07-21 16:44:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:25,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080228866] [2022-07-21 16:44:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:25,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 16:44:26,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080228866] [2022-07-21 16:44:26,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080228866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585157440] [2022-07-21 16:44:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:44:26,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:26,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:26,034 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) [2022-07-21 16:44:26,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 16:44:26,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:44:26,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:44:26,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-21 16:44:26,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:26,392 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 [2022-07-21 16:44:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:44:26,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:26,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585157440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:26,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-21 16:44:26,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124486693] [2022-07-21 16:44:26,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:26,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 16:44:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 16:44:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:44:26,642 INFO L87 Difference]: Start difference. First operand 321 states and 364 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 16:44:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:27,197 INFO L93 Difference]: Finished difference Result 342 states and 380 transitions. [2022-07-21 16:44:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 16:44:27,197 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 [2022-07-21 16:44:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:27,198 INFO L225 Difference]: With dead ends: 342 [2022-07-21 16:44:27,198 INFO L226 Difference]: Without dead ends: 342 [2022-07-21 16:44:27,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:44:27,200 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 314 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:27,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 314 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 406 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-07-21 16:44:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-21 16:44:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 321. [2022-07-21 16:44:27,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 292 states have (on average 1.1575342465753424) internal successors, (338), 304 states have internal predecessors, (338), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-21 16:44:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 361 transitions. [2022-07-21 16:44:27,204 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 361 transitions. Word has length 56 [2022-07-21 16:44:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:27,205 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 361 transitions. [2022-07-21 16:44:27,205 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) [2022-07-21 16:44:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 361 transitions. [2022-07-21 16:44:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-21 16:44:27,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:27,206 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] [2022-07-21 16:44:27,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 16:44:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 16:44:27,427 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 717947847, now seen corresponding path program 1 times [2022-07-21 16:44:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:27,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078627673] [2022-07-21 16:44:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:27,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:27,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078627673] [2022-07-21 16:44:27,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078627673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235319189] [2022-07-21 16:44:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:27,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:27,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:27,767 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:44:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 16:44:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:44:27,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:27,995 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:27,995 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 [2022-07-21 16:44:28,147 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:28,148 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 [2022-07-21 16:44:28,225 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 [2022-07-21 16:44:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:44:28,295 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 [2022-07-21 16:44:28,421 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:28,421 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 [2022-07-21 16:44:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:28,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:28,680 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 10 treesize of output 8 [2022-07-21 16:44:28,691 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 16:44:28,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-07-21 16:44:28,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235319189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:28,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:28,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2022-07-21 16:44:28,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445183041] [2022-07-21 16:44:28,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:28,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 16:44:28,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:28,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 16:44:28,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 16:44:28,748 INFO L87 Difference]: Start difference. First operand 321 states and 361 transitions. Second operand has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:30,344 INFO L93 Difference]: Finished difference Result 350 states and 383 transitions. [2022-07-21 16:44:30,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 16:44:30,344 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2022-07-21 16:44:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:30,345 INFO L225 Difference]: With dead ends: 350 [2022-07-21 16:44:30,345 INFO L226 Difference]: Without dead ends: 350 [2022-07-21 16:44:30,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1029, Invalid=4671, Unknown=0, NotChecked=0, Total=5700 [2022-07-21 16:44:30,347 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 744 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 515 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 706 Invalid, 0 Unknown, 347 Unchecked, 0.4s Time] [2022-07-21 16:44:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-21 16:44:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 320. [2022-07-21 16:44:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 303 states have internal predecessors, (336), 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) [2022-07-21 16:44:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 358 transitions. [2022-07-21 16:44:30,352 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 358 transitions. Word has length 59 [2022-07-21 16:44:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:30,353 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 358 transitions. [2022-07-21 16:44:30,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.857142857142857) internal successors, (108), 25 states have internal predecessors, (108), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 358 transitions. [2022-07-21 16:44:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-21 16:44:30,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:30,354 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-07-21 16:44:30,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-21 16:44:30,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 16:44:30,563 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash 781546727, now seen corresponding path program 1 times [2022-07-21 16:44:30,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925980413] [2022-07-21 16:44:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:30,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:30,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:30,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925980413] [2022-07-21 16:44:30,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925980413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:30,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714196721] [2022-07-21 16:44:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:30,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:30,832 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:44:30,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 16:44:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:30,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 16:44:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:31,077 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:31,078 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 [2022-07-21 16:44:31,305 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-21 16:44:31,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-07-21 16:44:31,405 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 [2022-07-21 16:44:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:31,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:31,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714196721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:31,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:31,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2022-07-21 16:44:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676276825] [2022-07-21 16:44:31,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:31,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:44:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:31,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:44:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-07-21 16:44:31,566 INFO L87 Difference]: Start difference. First operand 320 states and 358 transitions. Second operand has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:32,762 INFO L93 Difference]: Finished difference Result 346 states and 380 transitions. [2022-07-21 16:44:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-21 16:44:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2022-07-21 16:44:32,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:32,764 INFO L225 Difference]: With dead ends: 346 [2022-07-21 16:44:32,764 INFO L226 Difference]: Without dead ends: 346 [2022-07-21 16:44:32,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=568, Invalid=3214, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 16:44:32,765 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 603 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:32,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 267 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 468 Invalid, 0 Unknown, 344 Unchecked, 0.2s Time] [2022-07-21 16:44:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-07-21 16:44:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 319. [2022-07-21 16:44:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 294 states have (on average 1.1360544217687074) internal successors, (334), 302 states have internal predecessors, (334), 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) [2022-07-21 16:44:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 356 transitions. [2022-07-21 16:44:32,770 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 356 transitions. Word has length 60 [2022-07-21 16:44:32,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:32,770 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 356 transitions. [2022-07-21 16:44:32,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 4.153846153846154) internal successors, (108), 24 states have internal predecessors, (108), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:44:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 356 transitions. [2022-07-21 16:44:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-21 16:44:32,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:32,772 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:32,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:32,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-21 16:44:32,995 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:32,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1541855194, now seen corresponding path program 1 times [2022-07-21 16:44:32,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:32,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608880115] [2022-07-21 16:44:32,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:32,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:33,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608880115] [2022-07-21 16:44:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608880115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491357773] [2022-07-21 16:44:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:33,396 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:44:33,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 16:44:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-21 16:44:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:33,971 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:33,972 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 [2022-07-21 16:44:33,994 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:33,994 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 [2022-07-21 16:44:34,342 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 [2022-07-21 16:44:34,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:44:34,465 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 22 [2022-07-21 16:44:34,476 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:44:34,476 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 19 [2022-07-21 16:44:34,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 16:44:34,812 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:44:34,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-07-21 16:44:34,867 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:44:34,868 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 [2022-07-21 16:44:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:34,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:35,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-21 16:44:35,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491357773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:35,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:35,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2022-07-21 16:44:35,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809365328] [2022-07-21 16:44:35,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:44:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:35,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:44:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 16:44:35,185 INFO L87 Difference]: Start difference. First operand 319 states and 356 transitions. Second operand has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:38,930 INFO L93 Difference]: Finished difference Result 353 states and 387 transitions. [2022-07-21 16:44:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-21 16:44:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-07-21 16:44:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:38,932 INFO L225 Difference]: With dead ends: 353 [2022-07-21 16:44:38,932 INFO L226 Difference]: Without dead ends: 353 [2022-07-21 16:44:38,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1262, Invalid=7294, Unknown=0, NotChecked=0, Total=8556 [2022-07-21 16:44:38,933 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 691 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:38,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 493 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 802 Invalid, 0 Unknown, 481 Unchecked, 0.5s Time] [2022-07-21 16:44:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-21 16:44:38,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 318. [2022-07-21 16:44:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 294 states have (on average 1.1326530612244898) internal successors, (333), 301 states have internal predecessors, (333), 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) [2022-07-21 16:44:38,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 355 transitions. [2022-07-21 16:44:38,938 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 355 transitions. Word has length 61 [2022-07-21 16:44:38,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:38,938 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 355 transitions. [2022-07-21 16:44:38,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-21 16:44:38,939 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 355 transitions. [2022-07-21 16:44:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 16:44:38,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:38,940 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-07-21 16:44:38,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-21 16:44:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:39,155 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 40877192, now seen corresponding path program 1 times [2022-07-21 16:44:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981284698] [2022-07-21 16:44:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:39,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 16:44:39,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:39,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981284698] [2022-07-21 16:44:39,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981284698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716849380] [2022-07-21 16:44:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:39,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:39,209 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:44:39,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 16:44:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 16:44:39,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-21 16:44:39,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:39,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716849380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:39,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:44:39,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-21 16:44:39,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805448856] [2022-07-21 16:44:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:39,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:39,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:39,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:39,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:44:39,336 INFO L87 Difference]: Start difference. First operand 318 states and 355 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:39,355 INFO L93 Difference]: Finished difference Result 326 states and 363 transitions. [2022-07-21 16:44:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-07-21 16:44:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:39,357 INFO L225 Difference]: With dead ends: 326 [2022-07-21 16:44:39,357 INFO L226 Difference]: Without dead ends: 326 [2022-07-21 16:44:39,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:44:39,360 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:39,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 67 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-21 16:44:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 273. [2022-07-21 16:44:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 252 states have (on average 1.123015873015873) internal successors, (283), 258 states have internal predecessors, (283), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 16:44:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 303 transitions. [2022-07-21 16:44:39,366 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 303 transitions. Word has length 63 [2022-07-21 16:44:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:39,367 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 303 transitions. [2022-07-21 16:44:39,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 16:44:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 303 transitions. [2022-07-21 16:44:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 16:44:39,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:39,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:39,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:39,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:39,591 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:39,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 701075492, now seen corresponding path program 1 times [2022-07-21 16:44:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:39,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741712820] [2022-07-21 16:44:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 16:44:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 16:44:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:44:39,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:44:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741712820] [2022-07-21 16:44:39,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741712820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762754762] [2022-07-21 16:44:39,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:39,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:44:39,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:39,708 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:44:39,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 16:44:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:39,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 16:44:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:39,820 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 [2022-07-21 16:44:39,921 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-21 16:44:39,921 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 3 case distinctions, treesize of input 20 treesize of output 21 [2022-07-21 16:44:39,941 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-21 16:44:39,942 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 14 [2022-07-21 16:44:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:40,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762754762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:44:40,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:40,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-07-21 16:44:40,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061478627] [2022-07-21 16:44:40,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 16:44:40,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:44:40,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 16:44:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:44:40,005 INFO L87 Difference]: Start difference. First operand 273 states and 303 transitions. Second operand has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 16:44:40,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:40,189 INFO L93 Difference]: Finished difference Result 328 states and 364 transitions. [2022-07-21 16:44:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 16:44:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-07-21 16:44:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:40,190 INFO L225 Difference]: With dead ends: 328 [2022-07-21 16:44:40,191 INFO L226 Difference]: Without dead ends: 328 [2022-07-21 16:44:40,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:44:40,191 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 92 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:40,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 203 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-07-21 16:44:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-21 16:44:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 315. [2022-07-21 16:44:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 291 states have (on average 1.1237113402061856) internal successors, (327), 298 states have internal predecessors, (327), 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) [2022-07-21 16:44:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 351 transitions. [2022-07-21 16:44:40,196 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 351 transitions. Word has length 66 [2022-07-21 16:44:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:40,197 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 351 transitions. [2022-07-21 16:44:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.636363636363637) internal successors, (73), 11 states have internal predecessors, (73), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 16:44:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 351 transitions. [2022-07-21 16:44:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 16:44:40,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:40,198 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:40,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:40,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-21 16:44:40,399 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1953429379, now seen corresponding path program 1 times [2022-07-21 16:44:40,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:44:40,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427703756] [2022-07-21 16:44:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:40,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:44:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 16:44:40,419 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 16:44:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 16:44:40,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 16:44:40,480 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 16:44:40,481 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-07-21 16:44:40,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-07-21 16:44:40,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-07-21 16:44:40,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-07-21 16:44:40,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-07-21 16:44:40,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-07-21 16:44:40,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (11 of 23 remaining) [2022-07-21 16:44:40,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (10 of 23 remaining) [2022-07-21 16:44:40,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (9 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (8 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (7 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (6 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (5 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (4 of 23 remaining) [2022-07-21 16:44:40,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (3 of 23 remaining) [2022-07-21 16:44:40,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE (2 of 23 remaining) [2022-07-21 16:44:40,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE (1 of 23 remaining) [2022-07-21 16:44:40,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE (0 of 23 remaining) [2022-07-21 16:44:40,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-21 16:44:40,490 INFO L356 BasicCegarLoop]: Path program histogram: [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:40,494 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 16:44:40,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:40 BoogieIcfgContainer [2022-07-21 16:44:40,556 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 16:44:40,556 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 16:44:40,556 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 16:44:40,557 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 16:44:40,557 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:43:49" (3/4) ... [2022-07-21 16:44:40,559 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 16:44:40,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 16:44:40,560 INFO L158 Benchmark]: Toolchain (without parser) took 52296.07ms. Allocated memory was 54.5MB in the beginning and 174.1MB in the end (delta: 119.5MB). Free memory was 29.6MB in the beginning and 64.6MB in the end (delta: -35.0MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. [2022-07-21 16:44:40,560 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 36.0MB in the beginning and 36.0MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:44:40,560 INFO L158 Benchmark]: CACSL2BoogieTranslator took 509.80ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.3MB in the beginning and 40.6MB in the end (delta: -11.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2022-07-21 16:44:40,561 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.52ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:44:40,561 INFO L158 Benchmark]: Boogie Preprocessor took 30.70ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 36.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:44:40,561 INFO L158 Benchmark]: RCFGBuilder took 459.91ms. Allocated memory is still 67.1MB. Free memory was 36.7MB in the beginning and 39.6MB in the end (delta: -2.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 16:44:40,561 INFO L158 Benchmark]: TraceAbstraction took 51239.23ms. Allocated memory was 67.1MB in the beginning and 174.1MB in the end (delta: 107.0MB). Free memory was 39.1MB in the beginning and 64.6MB in the end (delta: -25.4MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. [2022-07-21 16:44:40,561 INFO L158 Benchmark]: Witness Printer took 3.39ms. Allocated memory is still 174.1MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:44:40,562 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 54.5MB. Free memory was 36.0MB in the beginning and 36.0MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 509.80ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 29.3MB in the beginning and 40.6MB in the end (delta: -11.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.52ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.70ms. Allocated memory is still 67.1MB. Free memory was 38.3MB in the beginning and 36.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 459.91ms. Allocated memory is still 67.1MB. Free memory was 36.7MB in the beginning and 39.6MB in the end (delta: -2.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 51239.23ms. Allocated memory was 67.1MB in the beginning and 174.1MB in the end (delta: 107.0MB). Free memory was 39.1MB in the beginning and 64.6MB in the end (delta: -25.4MB). Peak memory consumption was 84.4MB. Max. memory is 16.1GB. * Witness Printer took 3.39ms. Allocated memory is still 174.1MB. Free memory is still 64.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 722]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c1") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={4:0}, input={4:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={4:0}, input={4:0}, state=1] [L724] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L725] CALL parse_input("c2") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L725] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L726] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 715]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 719]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 67 locations, 23 error locations. Started 1 CEGAR loops. OverallTime: 51.1s, OverallIterations: 45, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12954 SdHoareTripleChecker+Valid, 7.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12940 mSDsluCounter, 10516 SdHoareTripleChecker+Invalid, 6.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3410 IncrementalHoareTripleChecker+Unchecked, 8474 mSDsCounter, 1723 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12138 IncrementalHoareTripleChecker+Invalid, 17271 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1723 mSolverCounterUnsat, 2042 mSDtfsCounter, 12138 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2945 GetRequests, 1885 SyntacticMatches, 47 SemanticMatches, 1013 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10698 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=664occurred in iteration=21, InterpolantAutomatonStates: 669, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 44 MinimizatonAttempts, 2284 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 18.6s InterpolantComputationTime, 3115 NumberOfCodeBlocks, 3115 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 3316 ConstructedInterpolants, 274 QuantifiedInterpolants, 38639 SizeOfPredicates, 156 NumberOfNonLiveVariables, 8975 ConjunctsInSsa, 702 ConjunctsInUnsatCore, 87 InterpolantComputations, 15 PerfectInterpolantSequences, 925/1948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-07-21 16:44:40,600 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_1.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 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:44:42,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:44:42,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:44:42,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:44:42,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:44:42,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:44:42,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:44:42,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:44:42,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:44:42,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:44:42,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:44:42,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:44:42,557 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:44:42,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:44:42,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:44:42,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:44:42,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:44:42,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:44:42,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:44:42,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:44:42,571 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:44:42,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:44:42,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:44:42,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:44:42,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:44:42,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:44:42,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:44:42,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:44:42,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:44:42,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:44:42,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:44:42,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:44:42,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:44:42,588 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:44:42,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:44:42,590 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:44:42,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:44:42,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:44:42,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:44:42,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:44:42,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:44:42,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:44:42,598 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2022-07-21 16:44:42,625 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:44:42,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:44:42,625 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:44:42,625 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:44:42,626 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:44:42,626 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:44:42,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:44:42,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:44:42,626 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:44:42,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:44:42,627 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:44:42,627 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:44:42,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:44:42,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:44:42,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:44:42,634 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:44:42,635 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:44:42,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:44:42,639 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:44:42,639 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 16:44:42,640 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 16:44:42,640 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:44:42,640 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:44:42,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:44:42,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:44:42,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:44:42,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:44:42,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:44:42,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:44:42,641 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 16:44:42,642 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 16:44:42,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 16:44:42,642 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f5db0b7f76a0d4c4c35217e21dd4a594e7457adb3230ac21a302fd5d7ee15c [2022-07-21 16:44:42,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:44:42,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:44:42,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:44:42,953 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:44:42,953 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:44:42,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-07-21 16:44:43,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8b9069b/aae551688c7d41b29adb40a361df3e53/FLAG10ffe8b64 [2022-07-21 16:44:43,520 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:44:43,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_1.i [2022-07-21 16:44:43,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8b9069b/aae551688c7d41b29adb40a361df3e53/FLAG10ffe8b64 [2022-07-21 16:44:44,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c8b9069b/aae551688c7d41b29adb40a361df3e53 [2022-07-21 16:44:44,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:44:44,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:44:44,038 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:44:44,038 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:44:44,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:44:44,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4005652f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44, skipping insertion in model container [2022-07-21 16:44:44,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:44:44,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:44:44,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:44:44,389 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:44:44,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:44:44,472 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:44:44,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44 WrapperNode [2022-07-21 16:44:44,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:44:44,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:44:44,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:44:44,474 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:44:44,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,536 INFO L137 Inliner]: procedures = 169, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-07-21 16:44:44,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:44:44,538 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:44:44,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:44:44,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:44:44,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:44:44,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:44:44,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:44:44,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:44:44,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (1/1) ... [2022-07-21 16:44:44,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:44:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:44:44,646 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) [2022-07-21 16:44:44,651 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 [2022-07-21 16:44:44,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-21 16:44:44,680 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-21 16:44:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 16:44:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:44:44,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:44:44,827 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:44:44,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:44:45,202 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:44:45,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:44:45,214 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 16:44:45,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:45 BoogieIcfgContainer [2022-07-21 16:44:45,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:44:45,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:44:45,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:44:45,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:44:45,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:44" (1/3) ... [2022-07-21 16:44:45,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5544e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:45, skipping insertion in model container [2022-07-21 16:44:45,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:44" (2/3) ... [2022-07-21 16:44:45,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5544e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:45, skipping insertion in model container [2022-07-21 16:44:45,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:45" (3/3) ... [2022-07-21 16:44:45,231 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_1.i [2022-07-21 16:44:45,245 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:44:45,245 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2022-07-21 16:44:45,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:44:45,296 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@2b531856, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@65789a5f [2022-07-21 16:44:45,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-07-21 16:44:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-21 16:44:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:44:45,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:45,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:44:45,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -594954629, now seen corresponding path program 1 times [2022-07-21 16:44:45,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:45,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469159166] [2022-07-21 16:44:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:45,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:45,339 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) [2022-07-21 16:44:45,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 16:44:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:44:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:45,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:45,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:45,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469159166] [2022-07-21 16:44:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469159166] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:45,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:45,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 16:44:45,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777994442] [2022-07-21 16:44:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:45,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:45,610 INFO L87 Difference]: Start difference. First operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:45,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:45,788 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2022-07-21 16:44:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:45,791 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 [2022-07-21 16:44:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:45,807 INFO L225 Difference]: With dead ends: 121 [2022-07-21 16:44:45,807 INFO L226 Difference]: Without dead ends: 117 [2022-07-21 16:44:45,812 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 [2022-07-21 16:44:45,816 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 56 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:45,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:45,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-21 16:44:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2022-07-21 16:44:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 80 states have internal predecessors, (100), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-21 16:44:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-07-21 16:44:45,866 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 6 [2022-07-21 16:44:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:45,867 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-07-21 16:44:45,867 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) [2022-07-21 16:44:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-07-21 16:44:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 16:44:45,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:45,871 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 16:44:45,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 16:44:46,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:46,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash -594954628, now seen corresponding path program 1 times [2022-07-21 16:44:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:46,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627912763] [2022-07-21 16:44:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:46,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:46,085 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) [2022-07-21 16:44:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 16:44:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 16:44:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:46,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:46,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:46,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627912763] [2022-07-21 16:44:46,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627912763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:46,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:46,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:44:46,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398912902] [2022-07-21 16:44:46,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:46,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:44:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:46,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:44:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:44:46,264 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:46,453 INFO L93 Difference]: Finished difference Result 214 states and 281 transitions. [2022-07-21 16:44:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:44:46,454 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 [2022-07-21 16:44:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:46,456 INFO L225 Difference]: With dead ends: 214 [2022-07-21 16:44:46,456 INFO L226 Difference]: Without dead ends: 214 [2022-07-21 16:44:46,457 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 [2022-07-21 16:44:46,458 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 143 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:46,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 158 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:44:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-21 16:44:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2022-07-21 16:44:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 120 states have (on average 1.7666666666666666) internal successors, (212), 142 states have internal predecessors, (212), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 16:44:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 243 transitions. [2022-07-21 16:44:46,474 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 243 transitions. Word has length 6 [2022-07-21 16:44:46,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:46,474 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 243 transitions. [2022-07-21 16:44:46,475 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) [2022-07-21 16:44:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 243 transitions. [2022-07-21 16:44:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:44:46,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:46,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:46,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:46,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:46,684 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:46,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1263724334, now seen corresponding path program 1 times [2022-07-21 16:44:46,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:46,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060848681] [2022-07-21 16:44:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:46,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:46,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:46,687 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) [2022-07-21 16:44:46,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 16:44:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:44:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:46,854 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 [2022-07-21 16:44:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:46,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:46,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060848681] [2022-07-21 16:44:46,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060848681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:46,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:46,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:44:46,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853473998] [2022-07-21 16:44:46,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:46,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:46,869 INFO L87 Difference]: Start difference. First operand 156 states and 243 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:47,133 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2022-07-21 16:44:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:47,133 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 [2022-07-21 16:44:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:47,135 INFO L225 Difference]: With dead ends: 247 [2022-07-21 16:44:47,136 INFO L226 Difference]: Without dead ends: 247 [2022-07-21 16:44:47,136 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 [2022-07-21 16:44:47,137 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:47,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 191 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:44:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-21 16:44:47,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2022-07-21 16:44:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 145 states have internal predecessors, (215), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 16:44:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 246 transitions. [2022-07-21 16:44:47,163 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 246 transitions. Word has length 7 [2022-07-21 16:44:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 246 transitions. [2022-07-21 16:44:47,164 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) [2022-07-21 16:44:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 246 transitions. [2022-07-21 16:44:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-21 16:44:47,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:47,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:47,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:47,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash -520748645, now seen corresponding path program 1 times [2022-07-21 16:44:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:47,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537875705] [2022-07-21 16:44:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:47,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:47,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:47,378 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) [2022-07-21 16:44:47,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 16:44:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:47,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 16:44:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:47,543 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 [2022-07-21 16:44:47,547 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 [2022-07-21 16:44:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:47,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:47,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:47,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537875705] [2022-07-21 16:44:47,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537875705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:47,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:47,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:44:47,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249442233] [2022-07-21 16:44:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:47,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:47,571 INFO L87 Difference]: Start difference. First operand 159 states and 246 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:47,787 INFO L93 Difference]: Finished difference Result 216 states and 282 transitions. [2022-07-21 16:44:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:47,788 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 [2022-07-21 16:44:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:47,789 INFO L225 Difference]: With dead ends: 216 [2022-07-21 16:44:47,790 INFO L226 Difference]: Without dead ends: 216 [2022-07-21 16:44:47,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:44:47,791 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 146 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:47,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 210 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:44:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-21 16:44:47,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2022-07-21 16:44:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 145 states have internal predecessors, (213), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 16:44:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 244 transitions. [2022-07-21 16:44:47,809 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 244 transitions. Word has length 8 [2022-07-21 16:44:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:47,810 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 244 transitions. [2022-07-21 16:44:47,810 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) [2022-07-21 16:44:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 244 transitions. [2022-07-21 16:44:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:44:47,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:47,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:47,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:48,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:48,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:48,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1036661236, now seen corresponding path program 1 times [2022-07-21 16:44:48,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041429718] [2022-07-21 16:44:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:48,023 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) [2022-07-21 16:44:48,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 16:44:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:48,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 16:44:48,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:48,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:48,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041429718] [2022-07-21 16:44:48,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041429718] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:48,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:48,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:44:48,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853670508] [2022-07-21 16:44:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:48,121 INFO L87 Difference]: Start difference. First operand 159 states and 244 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:48,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:48,270 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2022-07-21 16:44:48,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:48,271 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 [2022-07-21 16:44:48,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:48,272 INFO L225 Difference]: With dead ends: 253 [2022-07-21 16:44:48,272 INFO L226 Difference]: Without dead ends: 253 [2022-07-21 16:44:48,273 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 [2022-07-21 16:44:48,273 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 147 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:48,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 209 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:44:48,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-21 16:44:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 192. [2022-07-21 16:44:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 154 states have (on average 1.6818181818181819) internal successors, (259), 177 states have internal predecessors, (259), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 16:44:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2022-07-21 16:44:48,290 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2022-07-21 16:44:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:48,290 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2022-07-21 16:44:48,291 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) [2022-07-21 16:44:48,291 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2022-07-21 16:44:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:44:48,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:48,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:48,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:48,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 2071727293, now seen corresponding path program 1 times [2022-07-21 16:44:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:48,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621734458] [2022-07-21 16:44:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:48,502 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:48,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:48,503 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) [2022-07-21 16:44:48,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 16:44:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:48,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:44:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:48,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:48,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:48,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621734458] [2022-07-21 16:44:48,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621734458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:48,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:48,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:44:48,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234178252] [2022-07-21 16:44:48,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:48,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:44:48,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:44:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:44:48,616 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:48,796 INFO L93 Difference]: Finished difference Result 242 states and 313 transitions. [2022-07-21 16:44:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:44:48,797 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 [2022-07-21 16:44:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:48,798 INFO L225 Difference]: With dead ends: 242 [2022-07-21 16:44:48,798 INFO L226 Difference]: Without dead ends: 242 [2022-07-21 16:44:48,799 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 [2022-07-21 16:44:48,799 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 186 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:48,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 207 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:44:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-07-21 16:44:48,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2022-07-21 16:44:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 167 states have (on average 1.6766467065868262) internal successors, (280), 191 states have internal predecessors, (280), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-21 16:44:48,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 311 transitions. [2022-07-21 16:44:48,815 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 311 transitions. Word has length 10 [2022-07-21 16:44:48,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:48,815 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 311 transitions. [2022-07-21 16:44:48,815 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) [2022-07-21 16:44:48,815 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 311 transitions. [2022-07-21 16:44:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:44:48,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:48,816 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:48,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:49,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:49,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:49,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:49,017 INFO L85 PathProgramCache]: Analyzing trace with hash 288674115, now seen corresponding path program 1 times [2022-07-21 16:44:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:49,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992341092] [2022-07-21 16:44:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:49,019 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) [2022-07-21 16:44:49,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 16:44:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:49,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 16:44:49,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:49,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:49,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:49,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992341092] [2022-07-21 16:44:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992341092] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:49,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:49,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-21 16:44:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651940234] [2022-07-21 16:44:49,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:49,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:44:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:44:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:44:49,701 INFO L87 Difference]: Start difference. First operand 206 states and 311 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) [2022-07-21 16:44:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:50,186 INFO L93 Difference]: Finished difference Result 368 states and 497 transitions. [2022-07-21 16:44:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:44:50,188 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 [2022-07-21 16:44:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:50,190 INFO L225 Difference]: With dead ends: 368 [2022-07-21 16:44:50,190 INFO L226 Difference]: Without dead ends: 368 [2022-07-21 16:44:50,190 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 [2022-07-21 16:44:50,191 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 444 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:50,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 286 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:44:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-21 16:44:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 241. [2022-07-21 16:44:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 200 states have (on average 1.655) internal successors, (331), 226 states have internal predecessors, (331), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-21 16:44:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 368 transitions. [2022-07-21 16:44:50,201 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 368 transitions. Word has length 14 [2022-07-21 16:44:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:50,202 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 368 transitions. [2022-07-21 16:44:50,202 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) [2022-07-21 16:44:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 368 transitions. [2022-07-21 16:44:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 16:44:50,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:50,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:50,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:50,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 358962923, now seen corresponding path program 1 times [2022-07-21 16:44:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967271670] [2022-07-21 16:44:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:50,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:50,420 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) [2022-07-21 16:44:50,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 16:44:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:50,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:44:50,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:50,635 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 [2022-07-21 16:44:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:50,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:50,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967271670] [2022-07-21 16:44:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967271670] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:50,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:50,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 16:44:50,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215425293] [2022-07-21 16:44:50,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:50,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:44:50,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:50,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:44:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:44:50,782 INFO L87 Difference]: Start difference. First operand 241 states and 368 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) [2022-07-21 16:44:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:51,258 INFO L93 Difference]: Finished difference Result 418 states and 596 transitions. [2022-07-21 16:44:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:44:51,259 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 [2022-07-21 16:44:51,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:51,261 INFO L225 Difference]: With dead ends: 418 [2022-07-21 16:44:51,261 INFO L226 Difference]: Without dead ends: 418 [2022-07-21 16:44:51,262 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 [2022-07-21 16:44:51,262 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 242 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:51,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 449 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 16:44:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-21 16:44:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 251. [2022-07-21 16:44:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 210 states have (on average 1.6476190476190475) internal successors, (346), 236 states have internal predecessors, (346), 9 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-21 16:44:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 383 transitions. [2022-07-21 16:44:51,272 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 383 transitions. Word has length 15 [2022-07-21 16:44:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:51,272 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 383 transitions. [2022-07-21 16:44:51,272 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) [2022-07-21 16:44:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 383 transitions. [2022-07-21 16:44:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:44:51,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:51,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:51,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:51,483 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051230, now seen corresponding path program 1 times [2022-07-21 16:44:51,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:51,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006888159] [2022-07-21 16:44:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:51,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:51,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:51,485 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) [2022-07-21 16:44:51,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 16:44:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 16:44:51,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:51,757 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 [2022-07-21 16:44:51,764 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 [2022-07-21 16:44:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:51,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006888159] [2022-07-21 16:44:51,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006888159] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:51,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:51,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-21 16:44:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35456290] [2022-07-21 16:44:51,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:51,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:44:51,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:44:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:44:51,955 INFO L87 Difference]: Start difference. First operand 251 states and 383 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) [2022-07-21 16:44:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:52,963 INFO L93 Difference]: Finished difference Result 634 states and 850 transitions. [2022-07-21 16:44:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:44:52,964 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 [2022-07-21 16:44:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:52,979 INFO L225 Difference]: With dead ends: 634 [2022-07-21 16:44:52,979 INFO L226 Difference]: Without dead ends: 634 [2022-07-21 16:44:52,979 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 [2022-07-21 16:44:52,980 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 606 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:52,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 633 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 16:44:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-07-21 16:44:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 349. [2022-07-21 16:44:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 330 states have internal predecessors, (503), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2022-07-21 16:44:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 553 transitions. [2022-07-21 16:44:52,997 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 553 transitions. Word has length 16 [2022-07-21 16:44:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:52,997 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 553 transitions. [2022-07-21 16:44:52,997 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) [2022-07-21 16:44:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 553 transitions. [2022-07-21 16:44:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:44:52,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:52,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:53,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:53,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:53,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986564, now seen corresponding path program 1 times [2022-07-21 16:44:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:53,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292520681] [2022-07-21 16:44:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:53,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:53,210 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) [2022-07-21 16:44:53,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 16:44:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:44:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:53,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:53,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:53,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292520681] [2022-07-21 16:44:53,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292520681] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:53,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:53,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 16:44:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258692646] [2022-07-21 16:44:53,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:53,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:53,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:53,278 INFO L87 Difference]: Start difference. First operand 349 states and 553 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:53,305 INFO L93 Difference]: Finished difference Result 493 states and 776 transitions. [2022-07-21 16:44:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:44:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:53,308 INFO L225 Difference]: With dead ends: 493 [2022-07-21 16:44:53,308 INFO L226 Difference]: Without dead ends: 493 [2022-07-21 16:44:53,309 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 [2022-07-21 16:44:53,309 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 54 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:53,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-21 16:44:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 477. [2022-07-21 16:44:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 420 states have (on average 1.6547619047619047) internal successors, (695), 451 states have internal predecessors, (695), 15 states have call successors, (15), 10 states have call predecessors, (15), 19 states have return successors, (64), 15 states have call predecessors, (64), 15 states have call successors, (64) [2022-07-21 16:44:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 774 transitions. [2022-07-21 16:44:53,323 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 774 transitions. Word has length 18 [2022-07-21 16:44:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:53,324 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 774 transitions. [2022-07-21 16:44:53,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 774 transitions. [2022-07-21 16:44:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:44:53,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:53,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:53,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:53,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1592986820, now seen corresponding path program 1 times [2022-07-21 16:44:53,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:53,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042167555] [2022-07-21 16:44:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:53,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:53,536 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) [2022-07-21 16:44:53,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 16:44:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 16:44:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:53,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:53,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:53,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042167555] [2022-07-21 16:44:53,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042167555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:53,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:53,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:44:53,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578929233] [2022-07-21 16:44:53,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:53,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:53,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:53,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:53,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:53,647 INFO L87 Difference]: Start difference. First operand 477 states and 774 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) [2022-07-21 16:44:53,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:53,686 INFO L93 Difference]: Finished difference Result 523 states and 806 transitions. [2022-07-21 16:44:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:53,687 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 [2022-07-21 16:44:53,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:53,690 INFO L225 Difference]: With dead ends: 523 [2022-07-21 16:44:53,690 INFO L226 Difference]: Without dead ends: 523 [2022-07-21 16:44:53,690 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 [2022-07-21 16:44:53,691 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:53,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-07-21 16:44:53,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 506. [2022-07-21 16:44:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6322869955156951) internal successors, (728), 479 states have internal predecessors, (728), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2022-07-21 16:44:53,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 801 transitions. [2022-07-21 16:44:53,706 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 801 transitions. Word has length 18 [2022-07-21 16:44:53,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:53,707 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 801 transitions. [2022-07-21 16:44:53,707 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) [2022-07-21 16:44:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 801 transitions. [2022-07-21 16:44:53,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 16:44:53,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:53,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:44:53,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:53,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2137943300, now seen corresponding path program 1 times [2022-07-21 16:44:53,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:53,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110929105] [2022-07-21 16:44:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:53,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:53,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:53,920 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) [2022-07-21 16:44:53,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 16:44:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:44:53,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:54,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:54,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:54,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110929105] [2022-07-21 16:44:54,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110929105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:54,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:54,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-21 16:44:54,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296317032] [2022-07-21 16:44:54,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:54,047 INFO L87 Difference]: Start difference. First operand 506 states and 801 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:54,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:54,090 INFO L93 Difference]: Finished difference Result 521 states and 801 transitions. [2022-07-21 16:44:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 16:44:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:54,095 INFO L225 Difference]: With dead ends: 521 [2022-07-21 16:44:54,096 INFO L226 Difference]: Without dead ends: 521 [2022-07-21 16:44:54,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:54,097 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 31 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:54,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 121 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-07-21 16:44:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 506. [2022-07-21 16:44:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 446 states have (on average 1.6233183856502242) internal successors, (724), 479 states have internal predecessors, (724), 15 states have call successors, (15), 11 states have call predecessors, (15), 22 states have return successors, (58), 15 states have call predecessors, (58), 15 states have call successors, (58) [2022-07-21 16:44:54,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 797 transitions. [2022-07-21 16:44:54,111 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 797 transitions. Word has length 19 [2022-07-21 16:44:54,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:54,111 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 797 transitions. [2022-07-21 16:44:54,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:44:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 797 transitions. [2022-07-21 16:44:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:44:54,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:54,116 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-21 16:44:54,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:54,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1621609206, now seen corresponding path program 2 times [2022-07-21 16:44:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:54,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527574107] [2022-07-21 16:44:54,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:44:54,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:54,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:54,332 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) [2022-07-21 16:44:54,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 16:44:54,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:44:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:44:54,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 16:44:54,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:54,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:44:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:55,496 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:55,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527574107] [2022-07-21 16:44:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527574107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:44:55,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:44:55,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-07-21 16:44:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190359659] [2022-07-21 16:44:55,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:44:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:44:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:44:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:44:55,498 INFO L87 Difference]: Start difference. First operand 506 states and 797 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) [2022-07-21 16:44:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:57,900 INFO L93 Difference]: Finished difference Result 838 states and 1226 transitions. [2022-07-21 16:44:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 16:44:57,900 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 [2022-07-21 16:44:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:57,904 INFO L225 Difference]: With dead ends: 838 [2022-07-21 16:44:57,904 INFO L226 Difference]: Without dead ends: 838 [2022-07-21 16:44:57,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-21 16:44:57,905 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 302 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 16:44:57,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 604 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 16:44:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-21 16:44:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 556. [2022-07-21 16:44:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 493 states have (on average 1.6470588235294117) internal successors, (812), 529 states have internal predecessors, (812), 15 states have call successors, (15), 11 states have call predecessors, (15), 25 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2022-07-21 16:44:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 882 transitions. [2022-07-21 16:44:57,925 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 882 transitions. Word has length 22 [2022-07-21 16:44:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:57,925 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 882 transitions. [2022-07-21 16:44:57,926 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) [2022-07-21 16:44:57,926 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 882 transitions. [2022-07-21 16:44:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 16:44:57,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:57,927 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] [2022-07-21 16:44:57,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:58,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:58,136 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:58,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1078444150, now seen corresponding path program 1 times [2022-07-21 16:44:58,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:58,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134278490] [2022-07-21 16:44:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:58,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:58,139 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:44:58,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-21 16:44:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 16:44:58,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:44:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:44:58,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:44:58,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:44:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134278490] [2022-07-21 16:44:58,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134278490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:44:58,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:44:58,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:44:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261933026] [2022-07-21 16:44:58,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:44:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:44:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:44:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:44:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:44:58,201 INFO L87 Difference]: Start difference. First operand 556 states and 882 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) [2022-07-21 16:44:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:44:58,206 INFO L93 Difference]: Finished difference Result 400 states and 619 transitions. [2022-07-21 16:44:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:44:58,206 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 [2022-07-21 16:44:58,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:44:58,208 INFO L225 Difference]: With dead ends: 400 [2022-07-21 16:44:58,208 INFO L226 Difference]: Without dead ends: 400 [2022-07-21 16:44:58,208 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 [2022-07-21 16:44:58,209 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 13 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 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 [2022-07-21 16:44:58,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:44:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-07-21 16:44:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-07-21 16:44:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 349 states have (on average 1.6389684813753582) internal successors, (572), 380 states have internal predecessors, (572), 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) [2022-07-21 16:44:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 619 transitions. [2022-07-21 16:44:58,226 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 619 transitions. Word has length 25 [2022-07-21 16:44:58,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:44:58,226 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 619 transitions. [2022-07-21 16:44:58,226 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) [2022-07-21 16:44:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 619 transitions. [2022-07-21 16:44:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 16:44:58,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:44:58,228 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] [2022-07-21 16:44:58,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:44:58,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:44:58,437 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:44:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:44:58,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1446375410, now seen corresponding path program 1 times [2022-07-21 16:44:58,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:44:58,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847744111] [2022-07-21 16:44:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:44:58,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:44:58,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:44:58,440 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) [2022-07-21 16:44:58,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 16:44:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:44:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:44:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:00,819 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 [2022-07-21 16:45:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:00,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:03,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847744111] [2022-07-21 16:45:03,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847744111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881957175] [2022-07-21 16:45:03,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:03,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:45:03,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:45:03,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:45:03,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-21 16:45:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:03,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 16:45:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:05,716 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 [2022-07-21 16:45:05,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:05,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:08,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881957175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:08,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:08,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-21 16:45:08,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067072421] [2022-07-21 16:45:08,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:08,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:45:08,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:45:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=64, Unknown=2, NotChecked=0, Total=90 [2022-07-21 16:45:08,014 INFO L87 Difference]: Start difference. First operand 400 states and 619 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) [2022-07-21 16:45:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:12,448 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-07-21 16:45:12,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:45:12,449 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 [2022-07-21 16:45:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:12,451 INFO L225 Difference]: With dead ends: 697 [2022-07-21 16:45:12,451 INFO L226 Difference]: Without dead ends: 697 [2022-07-21 16:45:12,452 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=162, Unknown=4, NotChecked=0, Total=240 [2022-07-21 16:45:12,452 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 220 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:12,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 273 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 153 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-07-21 16:45:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-21 16:45:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 607. [2022-07-21 16:45:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 542 states have (on average 1.5904059040590406) internal successors, (862), 578 states have internal predecessors, (862), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2022-07-21 16:45:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 937 transitions. [2022-07-21 16:45:12,472 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 937 transitions. Word has length 27 [2022-07-21 16:45:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:12,472 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 937 transitions. [2022-07-21 16:45:12,473 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) [2022-07-21 16:45:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 937 transitions. [2022-07-21 16:45:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:45:12,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:12,475 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:45:12,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:12,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:12,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:12,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:12,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 308487171, now seen corresponding path program 1 times [2022-07-21 16:45:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:12,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230259965] [2022-07-21 16:45:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:12,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:12,881 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) [2022-07-21 16:45:12,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 16:45:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 16:45:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:13,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:45:13,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:13,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230259965] [2022-07-21 16:45:13,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230259965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:45:13,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:45:13,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:45:13,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13229975] [2022-07-21 16:45:13,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:45:13,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:45:13,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:13,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:45:13,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:45:13,084 INFO L87 Difference]: Start difference. First operand 607 states and 937 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) [2022-07-21 16:45:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:13,288 INFO L93 Difference]: Finished difference Result 560 states and 812 transitions. [2022-07-21 16:45:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:45:13,289 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 [2022-07-21 16:45:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:13,291 INFO L225 Difference]: With dead ends: 560 [2022-07-21 16:45:13,291 INFO L226 Difference]: Without dead ends: 560 [2022-07-21 16:45:13,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:45:13,292 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:13,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 215 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:45:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-07-21 16:45:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 488. [2022-07-21 16:45:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 432 states have (on average 1.5648148148148149) internal successors, (676), 464 states have internal predecessors, (676), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-07-21 16:45:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 732 transitions. [2022-07-21 16:45:13,305 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 732 transitions. Word has length 28 [2022-07-21 16:45:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:13,305 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 732 transitions. [2022-07-21 16:45:13,305 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) [2022-07-21 16:45:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 732 transitions. [2022-07-21 16:45:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-21 16:45:13,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:13,306 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] [2022-07-21 16:45:13,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:13,518 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:13,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1602633389, now seen corresponding path program 1 times [2022-07-21 16:45:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:13,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794819315] [2022-07-21 16:45:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:13,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:13,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:13,520 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:45:13,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 16:45:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:45:13,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:16,004 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 [2022-07-21 16:45:16,099 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 [2022-07-21 16:45:16,103 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 [2022-07-21 16:45:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:16,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:18,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:18,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794819315] [2022-07-21 16:45:18,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794819315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [581538804] [2022-07-21 16:45:18,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:18,353 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:45:18,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:45:18,354 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:45:18,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-21 16:45:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:18,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:45:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:22,851 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 [2022-07-21 16:45:22,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-21 16:45:22,918 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 [2022-07-21 16:45:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:22,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:25,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [581538804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:25,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:25,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-21 16:45:25,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320988675] [2022-07-21 16:45:25,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:25,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:45:25,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:25,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:45:25,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-21 16:45:25,129 INFO L87 Difference]: Start difference. First operand 488 states and 732 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) [2022-07-21 16:45:31,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:31,764 INFO L93 Difference]: Finished difference Result 567 states and 795 transitions. [2022-07-21 16:45:31,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:45:31,765 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 [2022-07-21 16:45:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:31,767 INFO L225 Difference]: With dead ends: 567 [2022-07-21 16:45:31,767 INFO L226 Difference]: Without dead ends: 567 [2022-07-21 16:45:31,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-21 16:45:31,768 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 286 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 194 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-07-21 16:45:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-21 16:45:31,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 489. [2022-07-21 16:45:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 433 states have (on average 1.5588914549653579) internal successors, (675), 465 states have internal predecessors, (675), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-07-21 16:45:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 731 transitions. [2022-07-21 16:45:31,778 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 731 transitions. Word has length 29 [2022-07-21 16:45:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:31,778 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 731 transitions. [2022-07-21 16:45:31,779 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) [2022-07-21 16:45:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 731 transitions. [2022-07-21 16:45:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:45:31,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:31,779 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, 1, 1] [2022-07-21 16:45:31,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:31,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:32,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:32,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1857972446, now seen corresponding path program 1 times [2022-07-21 16:45:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:32,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237830887] [2022-07-21 16:45:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:32,185 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:32,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:32,187 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:45:32,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 16:45:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:32,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 16:45:32,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:32,368 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 16:45:32,368 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 [2022-07-21 16:45:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:32,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:32,584 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:32,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237830887] [2022-07-21 16:45:32,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237830887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:32,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:32,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-07-21 16:45:32,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595663565] [2022-07-21 16:45:32,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:32,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:45:32,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:32,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:45:32,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:45:32,585 INFO L87 Difference]: Start difference. First operand 489 states and 731 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 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) [2022-07-21 16:45:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:32,911 INFO L93 Difference]: Finished difference Result 613 states and 857 transitions. [2022-07-21 16:45:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:45:32,912 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), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-21 16:45:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:32,914 INFO L225 Difference]: With dead ends: 613 [2022-07-21 16:45:32,914 INFO L226 Difference]: Without dead ends: 613 [2022-07-21 16:45:32,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:45:32,915 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 417 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:32,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 252 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 141 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-21 16:45:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-07-21 16:45:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 575. [2022-07-21 16:45:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 516 states have (on average 1.494186046511628) internal successors, (771), 549 states have internal predecessors, (771), 13 states have call successors, (13), 12 states have call predecessors, (13), 23 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2022-07-21 16:45:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 827 transitions. [2022-07-21 16:45:32,928 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 827 transitions. Word has length 30 [2022-07-21 16:45:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:32,928 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 827 transitions. [2022-07-21 16:45:32,929 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), 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) [2022-07-21 16:45:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 827 transitions. [2022-07-21 16:45:32,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-21 16:45:32,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:32,929 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, 1, 1] [2022-07-21 16:45:32,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:33,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:33,139 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:33,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1762570929, now seen corresponding path program 1 times [2022-07-21 16:45:33,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:33,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129034119] [2022-07-21 16:45:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:33,140 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:33,141 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) [2022-07-21 16:45:33,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 16:45:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:45:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:33,345 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 [2022-07-21 16:45:33,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:33,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:33,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:33,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129034119] [2022-07-21 16:45:33,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129034119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730650383] [2022-07-21 16:45:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:33,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:45:33,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:45:33,563 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:45:33,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-07-21 16:45:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:33,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:45:33,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:33,822 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 [2022-07-21 16:45:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:33,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:34,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [730650383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:34,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:34,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 16:45:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6927403] [2022-07-21 16:45:34,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:34,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:45:34,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:45:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:45:34,002 INFO L87 Difference]: Start difference. First operand 575 states and 827 transitions. Second operand has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2022-07-21 16:45:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:34,476 INFO L93 Difference]: Finished difference Result 735 states and 974 transitions. [2022-07-21 16:45:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:45:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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 31 [2022-07-21 16:45:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:34,479 INFO L225 Difference]: With dead ends: 735 [2022-07-21 16:45:34,479 INFO L226 Difference]: Without dead ends: 735 [2022-07-21 16:45:34,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:45:34,480 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 305 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:34,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 304 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 173 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-07-21 16:45:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-07-21 16:45:34,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 670. [2022-07-21 16:45:34,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 608 states have (on average 1.4638157894736843) internal successors, (890), 643 states have internal predecessors, (890), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-07-21 16:45:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 941 transitions. [2022-07-21 16:45:34,501 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 941 transitions. Word has length 31 [2022-07-21 16:45:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:34,501 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 941 transitions. [2022-07-21 16:45:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 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) [2022-07-21 16:45:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 941 transitions. [2022-07-21 16:45:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 16:45:34,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:34,503 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] [2022-07-21 16:45:34,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:34,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 16:45:34,916 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -132941611, now seen corresponding path program 1 times [2022-07-21 16:45:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:34,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718408314] [2022-07-21 16:45:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:34,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:34,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:34,918 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) [2022-07-21 16:45:34,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 16:45:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:34,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:45:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:37,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:37,217 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 [2022-07-21 16:45:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:37,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:40,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:40,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718408314] [2022-07-21 16:45:40,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718408314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:40,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1867901375] [2022-07-21 16:45:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:40,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:45:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:45:40,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:45:40,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-21 16:45:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 16:45:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:42,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:42,467 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 [2022-07-21 16:45:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:42,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:45,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1867901375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:45:45,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:45,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 16:45:45,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023089502] [2022-07-21 16:45:45,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:45,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:45:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:45,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:45:45,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=98, Unknown=2, NotChecked=0, Total=132 [2022-07-21 16:45:45,065 INFO L87 Difference]: Start difference. First operand 670 states and 941 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) [2022-07-21 16:45:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:49,589 INFO L93 Difference]: Finished difference Result 924 states and 1228 transitions. [2022-07-21 16:45:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:45:49,595 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 [2022-07-21 16:45:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:49,598 INFO L225 Difference]: With dead ends: 924 [2022-07-21 16:45:49,598 INFO L226 Difference]: Without dead ends: 924 [2022-07-21 16:45:49,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-07-21 16:45:49,599 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 320 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:49,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 320 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 190 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-21 16:45:49,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-07-21 16:45:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 757. [2022-07-21 16:45:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 692 states have (on average 1.4609826589595376) internal successors, (1011), 728 states have internal predecessors, (1011), 14 states have call successors, (14), 14 states have call predecessors, (14), 28 states have return successors, (39), 14 states have call predecessors, (39), 14 states have call successors, (39) [2022-07-21 16:45:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1064 transitions. [2022-07-21 16:45:49,618 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1064 transitions. Word has length 35 [2022-07-21 16:45:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:49,618 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1064 transitions. [2022-07-21 16:45:49,618 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) [2022-07-21 16:45:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1064 transitions. [2022-07-21 16:45:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 16:45:49,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:49,619 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:45:49,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-07-21 16:45:49,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:50,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:50,023 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:50,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1525473162, now seen corresponding path program 1 times [2022-07-21 16:45:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:50,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706729865] [2022-07-21 16:45:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:50,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:50,025 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) [2022-07-21 16:45:50,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 16:45:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 16:45:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:50,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-21 16:45:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:50,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:51,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:51,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706729865] [2022-07-21 16:45:51,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706729865] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:51,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:51,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-07-21 16:45:51,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623259848] [2022-07-21 16:45:51,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 16:45:51,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:51,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 16:45:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-07-21 16:45:51,125 INFO L87 Difference]: Start difference. First operand 757 states and 1064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:45:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:52,193 INFO L93 Difference]: Finished difference Result 780 states and 1062 transitions. [2022-07-21 16:45:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:45:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-07-21 16:45:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:52,196 INFO L225 Difference]: With dead ends: 780 [2022-07-21 16:45:52,196 INFO L226 Difference]: Without dead ends: 780 [2022-07-21 16:45:52,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:45:52,197 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 314 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:52,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 617 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 16:45:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-21 16:45:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 556. [2022-07-21 16:45:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 505 states have (on average 1.495049504950495) internal successors, (755), 535 states have internal predecessors, (755), 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) [2022-07-21 16:45:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 791 transitions. [2022-07-21 16:45:52,211 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 791 transitions. Word has length 36 [2022-07-21 16:45:52,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:52,212 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 791 transitions. [2022-07-21 16:45:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 16:45:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 791 transitions. [2022-07-21 16:45:52,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 16:45:52,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:52,213 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] [2022-07-21 16:45:52,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:52,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:52,423 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr19ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 634414932, now seen corresponding path program 1 times [2022-07-21 16:45:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:52,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105559808] [2022-07-21 16:45:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:52,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:52,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:52,424 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) [2022-07-21 16:45:52,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 16:45:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:52,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 16:45:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:52,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:52,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:52,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105559808] [2022-07-21 16:45:52,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105559808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:52,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:52,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-21 16:45:52,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448211749] [2022-07-21 16:45:52,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:52,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:45:52,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:52,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:45:52,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:45:52,620 INFO L87 Difference]: Start difference. First operand 556 states and 791 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) [2022-07-21 16:45:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:52,651 INFO L93 Difference]: Finished difference Result 566 states and 793 transitions. [2022-07-21 16:45:52,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:45:52,652 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 [2022-07-21 16:45:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:52,653 INFO L225 Difference]: With dead ends: 566 [2022-07-21 16:45:52,653 INFO L226 Difference]: Without dead ends: 566 [2022-07-21 16:45:52,653 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 [2022-07-21 16:45:52,654 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:52,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 116 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:45:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-21 16:45:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 552. [2022-07-21 16:45:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 504 states have (on average 1.4742063492063493) internal successors, (743), 531 states have internal predecessors, (743), 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) [2022-07-21 16:45:52,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 779 transitions. [2022-07-21 16:45:52,669 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 779 transitions. Word has length 40 [2022-07-21 16:45:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:52,670 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 779 transitions. [2022-07-21 16:45:52,670 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) [2022-07-21 16:45:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 779 transitions. [2022-07-21 16:45:52,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 16:45:52,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:52,671 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] [2022-07-21 16:45:52,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:52,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:52,880 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr20ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1807973484, now seen corresponding path program 1 times [2022-07-21 16:45:52,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:52,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623881530] [2022-07-21 16:45:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:52,881 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:52,882 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:45:52,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 16:45:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 16:45:52,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:53,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:53,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623881530] [2022-07-21 16:45:53,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623881530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:53,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:53,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-21 16:45:53,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112602565] [2022-07-21 16:45:53,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:53,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:45:53,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:45:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:45:53,193 INFO L87 Difference]: Start difference. First operand 552 states and 779 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) [2022-07-21 16:45:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:53,338 INFO L93 Difference]: Finished difference Result 498 states and 677 transitions. [2022-07-21 16:45:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:45:53,339 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 [2022-07-21 16:45:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:53,340 INFO L225 Difference]: With dead ends: 498 [2022-07-21 16:45:53,340 INFO L226 Difference]: Without dead ends: 498 [2022-07-21 16:45:53,340 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 [2022-07-21 16:45:53,341 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 75 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:53,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 202 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:45:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-21 16:45:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 466. [2022-07-21 16:45:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 426 states have (on average 1.4553990610328638) internal successors, (620), 447 states have internal predecessors, (620), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-07-21 16:45:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 648 transitions. [2022-07-21 16:45:53,350 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 648 transitions. Word has length 41 [2022-07-21 16:45:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:53,351 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 648 transitions. [2022-07-21 16:45:53,351 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) [2022-07-21 16:45:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 648 transitions. [2022-07-21 16:45:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:45:53,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:53,352 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] [2022-07-21 16:45:53,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-07-21 16:45:53,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:53,562 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr21ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:53,562 INFO L85 PathProgramCache]: Analyzing trace with hash -212603050, now seen corresponding path program 1 times [2022-07-21 16:45:53,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:53,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417407390] [2022-07-21 16:45:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:53,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:53,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:53,564 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) [2022-07-21 16:45:53,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 16:45:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 16:45:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:53,667 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 [2022-07-21 16:45:53,712 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 16:45:53,712 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 [2022-07-21 16:45:53,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:53,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:45:53,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:53,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417407390] [2022-07-21 16:45:53,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417407390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:53,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:53,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-21 16:45:53,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863706514] [2022-07-21 16:45:53,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:53,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:45:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:45:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:45:53,798 INFO L87 Difference]: Start difference. First operand 466 states and 648 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) [2022-07-21 16:45:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:53,928 INFO L93 Difference]: Finished difference Result 493 states and 660 transitions. [2022-07-21 16:45:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:45:53,929 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 [2022-07-21 16:45:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:53,930 INFO L225 Difference]: With dead ends: 493 [2022-07-21 16:45:53,930 INFO L226 Difference]: Without dead ends: 493 [2022-07-21 16:45:53,930 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 [2022-07-21 16:45:53,931 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 37 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:53,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:45:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-21 16:45:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 474. [2022-07-21 16:45:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 434 states have (on average 1.4377880184331797) internal successors, (624), 455 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-07-21 16:45:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 652 transitions. [2022-07-21 16:45:53,952 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 652 transitions. Word has length 42 [2022-07-21 16:45:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:53,952 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 652 transitions. [2022-07-21 16:45:53,953 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) [2022-07-21 16:45:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 652 transitions. [2022-07-21 16:45:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 16:45:53,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:53,953 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] [2022-07-21 16:45:53,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:54,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:54,163 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:54,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2034116786, now seen corresponding path program 1 times [2022-07-21 16:45:54,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:54,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332342500] [2022-07-21 16:45:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:54,165 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) [2022-07-21 16:45:54,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 16:45:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 16:45:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:45:54,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:45:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:45:54,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332342500] [2022-07-21 16:45:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332342500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:45:54,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:45:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-21 16:45:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126423188] [2022-07-21 16:45:54,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:45:54,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:45:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:45:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:45:54,354 INFO L87 Difference]: Start difference. First operand 474 states and 652 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) [2022-07-21 16:45:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:54,473 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2022-07-21 16:45:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:45:54,475 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 [2022-07-21 16:45:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:54,476 INFO L225 Difference]: With dead ends: 384 [2022-07-21 16:45:54,476 INFO L226 Difference]: Without dead ends: 384 [2022-07-21 16:45:54,476 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 [2022-07-21 16:45:54,477 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 124 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:45:54,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 295 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:45:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-21 16:45:54,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 349. [2022-07-21 16:45:54,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 312 states have (on average 1.3397435897435896) internal successors, (418), 332 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) [2022-07-21 16:45:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 442 transitions. [2022-07-21 16:45:54,484 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 442 transitions. Word has length 44 [2022-07-21 16:45:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:54,484 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 442 transitions. [2022-07-21 16:45:54,484 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) [2022-07-21 16:45:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 442 transitions. [2022-07-21 16:45:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 16:45:54,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:54,485 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] [2022-07-21 16:45:54,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:54,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:54,695 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:54,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:54,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1418260067, now seen corresponding path program 1 times [2022-07-21 16:45:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:54,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862046760] [2022-07-21 16:45:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:54,698 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:45:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 16:45:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 16:45:54,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-21 16:45:54,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:45:54,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:45:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862046760] [2022-07-21 16:45:54,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862046760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:45:54,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:45:54,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:45:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501477683] [2022-07-21 16:45:54,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:45:54,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:45:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:45:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:45:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:45:54,792 INFO L87 Difference]: Start difference. First operand 349 states and 442 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) [2022-07-21 16:45:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:45:54,796 INFO L93 Difference]: Finished difference Result 323 states and 395 transitions. [2022-07-21 16:45:54,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:45:54,800 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 [2022-07-21 16:45:54,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:45:54,801 INFO L225 Difference]: With dead ends: 323 [2022-07-21 16:45:54,801 INFO L226 Difference]: Without dead ends: 323 [2022-07-21 16:45:54,801 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 [2022-07-21 16:45:54,801 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 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 [2022-07-21 16:45:54,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:45:54,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-21 16:45:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2022-07-21 16:45:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 282 states have (on average 1.2872340425531914) internal successors, (363), 298 states have internal predecessors, (363), 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) [2022-07-21 16:45:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2022-07-21 16:45:54,810 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 47 [2022-07-21 16:45:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:45:54,810 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2022-07-21 16:45:54,810 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) [2022-07-21 16:45:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2022-07-21 16:45:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 16:45:54,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:45:54,811 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] [2022-07-21 16:45:54,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 16:45:55,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:45:55,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:45:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:45:55,022 INFO L85 PathProgramCache]: Analyzing trace with hash -377504153, now seen corresponding path program 1 times [2022-07-21 16:45:55,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:45:55,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224168097] [2022-07-21 16:45:55,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:45:55,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:45:55,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:45:55,023 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) [2022-07-21 16:45:55,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 16:45:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:45:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:45:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:45:57,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:45:57,595 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 [2022-07-21 16:45:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:45:57,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:00,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:46:00,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224168097] [2022-07-21 16:46:00,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224168097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:46:00,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141503097] [2022-07-21 16:46:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:00,207 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:46:00,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:46:00,208 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:46:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-21 16:46:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:00,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:46:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:46:02,901 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 [2022-07-21 16:46:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:46:02,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:05,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1141503097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:46:05,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:46:05,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-21 16:46:05,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565587992] [2022-07-21 16:46:05,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:46:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:46:05,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:46:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:46:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2022-07-21 16:46:05,206 INFO L87 Difference]: Start difference. First operand 315 states and 387 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) [2022-07-21 16:46:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:46:09,845 INFO L93 Difference]: Finished difference Result 350 states and 406 transitions. [2022-07-21 16:46:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:46:09,846 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 [2022-07-21 16:46:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:46:09,847 INFO L225 Difference]: With dead ends: 350 [2022-07-21 16:46:09,847 INFO L226 Difference]: Without dead ends: 350 [2022-07-21 16:46:09,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=117, Invalid=259, Unknown=4, NotChecked=0, Total=380 [2022-07-21 16:46:09,848 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 189 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:46:09,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 258 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-07-21 16:46:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-21 16:46:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 314. [2022-07-21 16:46:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2775800711743772) internal successors, (359), 297 states have internal predecessors, (359), 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) [2022-07-21 16:46:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 383 transitions. [2022-07-21 16:46:09,854 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 383 transitions. Word has length 48 [2022-07-21 16:46:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:46:09,854 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 383 transitions. [2022-07-21 16:46:09,854 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) [2022-07-21 16:46:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 383 transitions. [2022-07-21 16:46:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-21 16:46:09,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:46:09,855 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] [2022-07-21 16:46:09,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:10,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:10,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-21 16:46:10,264 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:46:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:46:10,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2004239674, now seen corresponding path program 1 times [2022-07-21 16:46:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:46:10,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042016250] [2022-07-21 16:46:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:46:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:46:10,266 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) [2022-07-21 16:46:10,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-21 16:46:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:10,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:46:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:15,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:46:15,159 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 [2022-07-21 16:46:15,276 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 [2022-07-21 16:46:15,282 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 [2022-07-21 16:46:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 16:46:15,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:17,625 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:46:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042016250] [2022-07-21 16:46:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042016250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:46:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1148190912] [2022-07-21 16:46:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:17,626 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:46:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:46:17,627 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) [2022-07-21 16:46:17,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-21 16:46:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:46:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:46:22,537 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 [2022-07-21 16:46:22,588 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 [2022-07-21 16:46:22,592 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 [2022-07-21 16:46:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 16:46:22,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1148190912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:46:24,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:46:24,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 16:46:24,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150572203] [2022-07-21 16:46:24,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:46:24,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:46:24,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:46:24,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:46:24,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-21 16:46:24,801 INFO L87 Difference]: Start difference. First operand 314 states and 383 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) [2022-07-21 16:46:31,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:46:31,468 INFO L93 Difference]: Finished difference Result 343 states and 403 transitions. [2022-07-21 16:46:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:46:31,469 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 [2022-07-21 16:46:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:46:31,470 INFO L225 Difference]: With dead ends: 343 [2022-07-21 16:46:31,470 INFO L226 Difference]: Without dead ends: 343 [2022-07-21 16:46:31,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-21 16:46:31,471 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 131 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:46:31,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 289 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 189 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-07-21 16:46:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-21 16:46:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 314. [2022-07-21 16:46:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 281 states have (on average 1.2740213523131672) internal successors, (358), 297 states have internal predecessors, (358), 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) [2022-07-21 16:46:31,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 382 transitions. [2022-07-21 16:46:31,477 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 382 transitions. Word has length 50 [2022-07-21 16:46:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:46:31,478 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 382 transitions. [2022-07-21 16:46:31,478 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) [2022-07-21 16:46:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 382 transitions. [2022-07-21 16:46:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:46:31,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:46:31,479 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] [2022-07-21 16:46:31,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:31,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-07-21 16:46:31,889 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 [2022-07-21 16:46:31,890 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:46:31,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:46:31,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001345, now seen corresponding path program 1 times [2022-07-21 16:46:31,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:46:31,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190899481] [2022-07-21 16:46:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:31,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:46:31,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:46:31,892 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) [2022-07-21 16:46:31,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-21 16:46:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:46:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:32,142 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:46:32,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-21 16:46:34,621 INFO L356 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2022-07-21 16:46:34,621 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 21 treesize of output 37 [2022-07-21 16:46:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:46:34,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:34,890 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 16:46:34,890 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 60 treesize of output 57 [2022-07-21 16:46:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:46:37,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:46:37,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190899481] [2022-07-21 16:46:37,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190899481] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:46:37,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:46:37,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-07-21 16:46:37,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269353482] [2022-07-21 16:46:37,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:46:37,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:46:37,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:46:37,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:46:37,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=303, Unknown=2, NotChecked=0, Total=380 [2022-07-21 16:46:37,953 INFO L87 Difference]: Start difference. First operand 314 states and 382 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) [2022-07-21 16:46:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:46:44,647 INFO L93 Difference]: Finished difference Result 340 states and 401 transitions. [2022-07-21 16:46:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:46:44,648 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 [2022-07-21 16:46:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:46:44,649 INFO L225 Difference]: With dead ends: 340 [2022-07-21 16:46:44,649 INFO L226 Difference]: Without dead ends: 340 [2022-07-21 16:46:44,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=189, Invalid=619, Unknown=4, NotChecked=0, Total=812 [2022-07-21 16:46:44,650 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 190 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:46:44,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 313 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 200 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-07-21 16:46:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-21 16:46:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 324. [2022-07-21 16:46:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 293 states have (on average 1.2389078498293515) internal successors, (363), 307 states have internal predecessors, (363), 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) [2022-07-21 16:46:44,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 387 transitions. [2022-07-21 16:46:44,655 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 387 transitions. Word has length 51 [2022-07-21 16:46:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:46:44,656 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 387 transitions. [2022-07-21 16:46:44,656 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) [2022-07-21 16:46:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 387 transitions. [2022-07-21 16:46:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:46:44,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:46:44,657 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] [2022-07-21 16:46:44,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:44,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:46:44,867 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:46:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:46:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -2111001344, now seen corresponding path program 1 times [2022-07-21 16:46:44,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:46:44,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220922412] [2022-07-21 16:46:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:46:44,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:46:44,869 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) [2022-07-21 16:46:44,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-21 16:46:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:46:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:45,184 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:46:45,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-21 16:46:45,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-21 16:46:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:46:45,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:46:46,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-21 16:46:48,619 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-21 16:46:48,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-07-21 16:46:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:46:49,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:46:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220922412] [2022-07-21 16:46:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220922412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:46:49,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:46:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-07-21 16:46:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572437590] [2022-07-21 16:46:49,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:46:49,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-21 16:46:49,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:46:49,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-21 16:46:49,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=170, Unknown=1, NotChecked=0, Total=240 [2022-07-21 16:46:49,056 INFO L87 Difference]: Start difference. First operand 324 states and 387 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:46:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:46:53,850 INFO L93 Difference]: Finished difference Result 454 states and 529 transitions. [2022-07-21 16:46:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:46:53,851 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-07-21 16:46:53,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:46:53,852 INFO L225 Difference]: With dead ends: 454 [2022-07-21 16:46:53,852 INFO L226 Difference]: Without dead ends: 454 [2022-07-21 16:46:53,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=214, Invalid=434, Unknown=2, NotChecked=0, Total=650 [2022-07-21 16:46:53,853 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 373 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:46:53,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 206 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 179 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-07-21 16:46:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-21 16:46:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 323. [2022-07-21 16:46:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2294520547945205) internal successors, (359), 306 states have internal predecessors, (359), 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) [2022-07-21 16:46:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 383 transitions. [2022-07-21 16:46:53,859 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 383 transitions. Word has length 51 [2022-07-21 16:46:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:46:53,860 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 383 transitions. [2022-07-21 16:46:53,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 13 states have internal predecessors, (92), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 16:46:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 383 transitions. [2022-07-21 16:46:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-21 16:46:53,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:46:53,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:46:53,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:46:54,071 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:46:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:46:54,071 INFO L85 PathProgramCache]: Analyzing trace with hash 410026143, now seen corresponding path program 1 times [2022-07-21 16:46:54,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:46:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864704209] [2022-07-21 16:46:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:46:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:46:54,073 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:46:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-21 16:46:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:46:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:54,250 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-21 16:46:54,250 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 [2022-07-21 16:46:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:46:54,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:46:54,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:46:54,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864704209] [2022-07-21 16:46:54,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864704209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:46:54,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:46:54,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2022-07-21 16:46:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455320761] [2022-07-21 16:46:54,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:46:54,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 16:46:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:46:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 16:46:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:46:54,581 INFO L87 Difference]: Start difference. First operand 323 states and 383 transitions. Second operand has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 16:46:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:46:54,948 INFO L93 Difference]: Finished difference Result 342 states and 392 transitions. [2022-07-21 16:46:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:46:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-21 16:46:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:46:54,949 INFO L225 Difference]: With dead ends: 342 [2022-07-21 16:46:54,949 INFO L226 Difference]: Without dead ends: 342 [2022-07-21 16:46:54,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 89 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:46:54,950 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 234 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:46:54,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 224 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-07-21 16:46:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-07-21 16:46:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 323. [2022-07-21 16:46:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2191780821917808) internal successors, (356), 306 states have internal predecessors, (356), 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) [2022-07-21 16:46:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 380 transitions. [2022-07-21 16:46:54,955 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 380 transitions. Word has length 51 [2022-07-21 16:46:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:46:54,955 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 380 transitions. [2022-07-21 16:46:54,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.555555555555555) internal successors, (59), 7 states have internal predecessors, (59), 1 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 16:46:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 380 transitions. [2022-07-21 16:46:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:46:54,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:46:54,956 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] [2022-07-21 16:46:54,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-21 16:46:55,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:46:55,156 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:46:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:46:55,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1016532274, now seen corresponding path program 1 times [2022-07-21 16:46:55,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:46:55,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695373511] [2022-07-21 16:46:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:46:55,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:46:55,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:46:55,158 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) [2022-07-21 16:46:55,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-21 16:46:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:46:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 16:46:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:46:55,426 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:46:55,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-21 16:46:57,900 INFO L356 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2022-07-21 16:46:57,901 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 25 treesize of output 45 [2022-07-21 16:46:57,978 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 [2022-07-21 16:46:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:46:58,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:46:58,223 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 16:46:58,223 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 183 treesize of output 170 [2022-07-21 16:47:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:03,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:47:03,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695373511] [2022-07-21 16:47:03,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695373511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:47:03,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:47:03,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-07-21 16:47:03,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216171971] [2022-07-21 16:47:03,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:47:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-21 16:47:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:47:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-21 16:47:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=639, Unknown=3, NotChecked=0, Total=756 [2022-07-21 16:47:03,537 INFO L87 Difference]: Start difference. First operand 323 states and 380 transitions. Second operand has 28 states, 25 states have (on average 3.76) internal successors, (94), 23 states have internal predecessors, (94), 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) [2022-07-21 16:47:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:47:12,717 INFO L93 Difference]: Finished difference Result 359 states and 402 transitions. [2022-07-21 16:47:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 16:47:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 23 states have internal predecessors, (94), 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 52 [2022-07-21 16:47:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:47:12,718 INFO L225 Difference]: With dead ends: 359 [2022-07-21 16:47:12,718 INFO L226 Difference]: Without dead ends: 359 [2022-07-21 16:47:12,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=419, Invalid=1554, Unknown=7, NotChecked=0, Total=1980 [2022-07-21 16:47:12,719 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 651 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:47:12,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 305 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 391 Invalid, 0 Unknown, 230 Unchecked, 0.5s Time] [2022-07-21 16:47:12,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-21 16:47:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 323. [2022-07-21 16:47:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2123287671232876) internal successors, (354), 306 states have internal predecessors, (354), 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) [2022-07-21 16:47:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 378 transitions. [2022-07-21 16:47:12,724 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 378 transitions. Word has length 52 [2022-07-21 16:47:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:47:12,725 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 378 transitions. [2022-07-21 16:47:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.76) internal successors, (94), 23 states have internal predecessors, (94), 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) [2022-07-21 16:47:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 378 transitions. [2022-07-21 16:47:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:47:12,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:47:12,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:47:12,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:12,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:47:12,938 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:47:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:47:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash -174091406, now seen corresponding path program 1 times [2022-07-21 16:47:12,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:47:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214516551] [2022-07-21 16:47:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:12,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:47:12,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:47:12,940 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:47:12,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-21 16:47:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:13,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:47:13,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:13,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:13,182 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 [2022-07-21 16:47:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:47:15,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:15,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:47:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214516551] [2022-07-21 16:47:15,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214516551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392811980] [2022-07-21 16:47:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:15,546 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:47:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:47:15,547 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:47:15,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-07-21 16:47:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 16:47:15,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:17,883 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 [2022-07-21 16:47:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 16:47:17,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [392811980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:18,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:47:18,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 16:47:18,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338753133] [2022-07-21 16:47:18,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:47:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:47:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:47:18,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:47:18,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2022-07-21 16:47:18,160 INFO L87 Difference]: Start difference. First operand 323 states and 378 transitions. Second operand has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-07-21 16:47:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:47:20,559 INFO L93 Difference]: Finished difference Result 362 states and 403 transitions. [2022-07-21 16:47:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 16:47:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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 52 [2022-07-21 16:47:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:47:20,560 INFO L225 Difference]: With dead ends: 362 [2022-07-21 16:47:20,560 INFO L226 Difference]: Without dead ends: 362 [2022-07-21 16:47:20,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=161, Invalid=389, Unknown=2, NotChecked=0, Total=552 [2022-07-21 16:47:20,561 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 234 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:47:20,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 228 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 150 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-07-21 16:47:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-21 16:47:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 323. [2022-07-21 16:47:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.1917808219178083) internal successors, (348), 306 states have internal predecessors, (348), 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) [2022-07-21 16:47:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 372 transitions. [2022-07-21 16:47:20,567 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 372 transitions. Word has length 52 [2022-07-21 16:47:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:47:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 372 transitions. [2022-07-21 16:47:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 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) [2022-07-21 16:47:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 372 transitions. [2022-07-21 16:47:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 16:47:20,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:47:20,568 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:47:20,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:20,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:20,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:47:20,972 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:47:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:47:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1928976600, now seen corresponding path program 2 times [2022-07-21 16:47:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:47:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755191456] [2022-07-21 16:47:20,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:47:20,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:47:20,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:47:20,974 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:47:20,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-07-21 16:47:21,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:47:21,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:47:21,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:47:21,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:21,266 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 [2022-07-21 16:47:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:47:21,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:21,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:47:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755191456] [2022-07-21 16:47:21,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755191456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:21,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1012501372] [2022-07-21 16:47:21,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:47:21,472 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:47:21,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:47:21,473 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:47:21,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-07-21 16:47:21,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:47:21,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:47:21,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:47:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:21,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:21,838 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 [2022-07-21 16:47:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 16:47:21,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:21,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1012501372] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:21,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:47:21,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-21 16:47:21,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851017753] [2022-07-21 16:47:21,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:47:21,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:47:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:47:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:47:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:47:21,956 INFO L87 Difference]: Start difference. First operand 323 states and 372 transitions. Second operand has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-07-21 16:47:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:47:24,303 INFO L93 Difference]: Finished difference Result 350 states and 392 transitions. [2022-07-21 16:47:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:47:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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 52 [2022-07-21 16:47:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:47:24,304 INFO L225 Difference]: With dead ends: 350 [2022-07-21 16:47:24,304 INFO L226 Difference]: Without dead ends: 350 [2022-07-21 16:47:24,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2022-07-21 16:47:24,305 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 155 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:47:24,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 198 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 130 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-07-21 16:47:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-21 16:47:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2022-07-21 16:47:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 306 states have internal predecessors, (346), 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) [2022-07-21 16:47:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 370 transitions. [2022-07-21 16:47:24,309 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 370 transitions. Word has length 52 [2022-07-21 16:47:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:47:24,310 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 370 transitions. [2022-07-21 16:47:24,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 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) [2022-07-21 16:47:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 370 transitions. [2022-07-21 16:47:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 16:47:24,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:47:24,311 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] [2022-07-21 16:47:24,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:24,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:24,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:47:24,714 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:47:24,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:47:24,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729377, now seen corresponding path program 1 times [2022-07-21 16:47:24,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:47:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179134589] [2022-07-21 16:47:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:47:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:47:24,716 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:47:24,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-07-21 16:47:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 16:47:24,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:25,087 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:47:25,087 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 [2022-07-21 16:47:25,411 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 16:47:25,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-07-21 16:47:25,752 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 [2022-07-21 16:47:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:25,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-21 16:47:26,100 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 [2022-07-21 16:47:26,103 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 [2022-07-21 16:47:26,167 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:47:26,167 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 [2022-07-21 16:47:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:26,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:26,538 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 16:47:26,539 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 [2022-07-21 16:47:26,552 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 [2022-07-21 16:47:26,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:47:26,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179134589] [2022-07-21 16:47:26,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179134589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:26,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491490251] [2022-07-21 16:47:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:26,607 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:47:26,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:47:26,608 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:47:26,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-07-21 16:47:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:26,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 16:47:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:27,053 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:47:27,053 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 [2022-07-21 16:47:27,247 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-21 16:47:27,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-07-21 16:47:27,483 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 [2022-07-21 16:47:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:47:27,665 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 [2022-07-21 16:47:27,809 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 [2022-07-21 16:47:27,811 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 [2022-07-21 16:47:27,825 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-21 16:47:27,825 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 [2022-07-21 16:47:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:27,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:27,963 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-21 16:47:27,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-07-21 16:47:27,973 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 [2022-07-21 16:47:28,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491490251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:28,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 16:47:28,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2022-07-21 16:47:28,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081604787] [2022-07-21 16:47:28,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 16:47:28,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:47:28,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:47:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:47:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-21 16:47:28,032 INFO L87 Difference]: Start difference. First operand 323 states and 370 transitions. Second operand has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 16:47:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:47:33,745 INFO L93 Difference]: Finished difference Result 364 states and 406 transitions. [2022-07-21 16:47:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:47:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2022-07-21 16:47:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:47:33,746 INFO L225 Difference]: With dead ends: 364 [2022-07-21 16:47:33,746 INFO L226 Difference]: Without dead ends: 364 [2022-07-21 16:47:33,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=367, Invalid=1272, Unknown=1, NotChecked=0, Total=1640 [2022-07-21 16:47:33,747 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 186 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:47:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 437 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 169 Invalid, 0 Unknown, 442 Unchecked, 0.3s Time] [2022-07-21 16:47:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-21 16:47:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 339. [2022-07-21 16:47:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 306 states have (on average 1.1764705882352942) internal successors, (360), 320 states have internal predecessors, (360), 9 states have call successors, (9), 9 states have call predecessors, (9), 14 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-07-21 16:47:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 388 transitions. [2022-07-21 16:47:33,752 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 388 transitions. Word has length 53 [2022-07-21 16:47:33,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:47:33,752 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 388 transitions. [2022-07-21 16:47:33,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.388888888888889) internal successors, (61), 16 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 16:47:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 388 transitions. [2022-07-21 16:47:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:47:33,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:47:33,753 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] [2022-07-21 16:47:33,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:33,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-07-21 16:47:34,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 16:47:34,157 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-07-21 16:47:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:47:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1929937680, now seen corresponding path program 1 times [2022-07-21 16:47:34,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 16:47:34,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945533498] [2022-07-21 16:47:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:34,158 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 16:47:34,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 16:47:34,159 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 16:47:34,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-07-21 16:47:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 16:47:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:34,358 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 16:47:34,358 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 18 treesize of output 25 [2022-07-21 16:47:36,594 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-21 16:47:36,594 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 28 treesize of output 42 [2022-07-21 16:47:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:36,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:38,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 16:47:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945533498] [2022-07-21 16:47:38,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945533498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:47:38,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [56543465] [2022-07-21 16:47:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:47:38,780 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 16:47:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 16:47:38,781 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 16:47:38,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-07-21 16:47:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:47:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:47:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:47:43,197 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-21 16:47:43,197 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 18 treesize of output 25 [2022-07-21 16:47:49,505 INFO L356 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2022-07-21 16:47:49,505 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 [2022-07-21 16:47:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:49,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:47:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:47:56,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [56543465] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:47:56,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:47:56,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-07-21 16:47:56,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873023035] [2022-07-21 16:47:56,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:47:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-21 16:47:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 16:47:56,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-21 16:47:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=471, Unknown=8, NotChecked=0, Total=600 [2022-07-21 16:47:56,074 INFO L87 Difference]: Start difference. First operand 339 states and 388 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)