./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:27:37,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:27:37,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:27:37,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:27:37,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:27:37,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:27:37,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:27:37,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:27:37,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:27:37,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:27:37,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:27:37,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:27:37,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:27:37,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:27:37,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:27:37,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:27:37,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:27:37,254 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:27:37,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:27:37,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:27:37,261 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:27:37,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:27:37,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:27:37,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:27:37,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:27:37,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:27:37,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:27:37,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:27:37,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:27:37,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:27:37,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:27:37,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:27:37,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:27:37,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:27:37,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:27:37,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:27:37,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:27:37,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:27:37,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:27:37,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:27:37,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:27:37,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:27:37,287 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 19:27:37,321 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:27:37,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:27:37,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:27:37,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:27:37,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:27:37,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:27:37,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:27:37,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:27:37,324 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:27:37,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:27:37,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:27:37,326 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:27:37,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:27:37,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:27:37,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:27:37,327 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:27:37,327 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:27:37,327 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:27:37,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:27:37,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:27:37,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:27:37,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:27:37,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:27:37,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:27:37,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:27:37,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:27:37,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:27:37,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:27:37,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 19:27:37,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 19:27:37,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-12 19:27:37,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:27:37,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:27:37,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:27:37,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:27:37,605 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:27:37,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-12 19:27:37,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65a88e48/2cba4c3334304ade81e33b6f24ed95b4/FLAG6142bc572 [2022-07-12 19:27:38,235 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:27:38,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-12 19:27:38,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65a88e48/2cba4c3334304ade81e33b6f24ed95b4/FLAG6142bc572 [2022-07-12 19:27:38,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65a88e48/2cba4c3334304ade81e33b6f24ed95b4 [2022-07-12 19:27:38,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:27:38,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:27:38,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:27:38,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:27:38,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:27:38,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:38,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69adc609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38, skipping insertion in model container [2022-07-12 19:27:38,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:38,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:27:38,608 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:27:38,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:27:38,885 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:27:38,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:27:38,972 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:27:38,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38 WrapperNode [2022-07-12 19:27:38,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:27:38,974 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:27:38,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:27:38,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:27:38,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,057 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-07-12 19:27:39,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:27:39,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:27:39,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:27:39,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:27:39,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:27:39,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:27:39,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:27:39,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:27:39,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (1/1) ... [2022-07-12 19:27:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:27:39,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:39,165 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) [2022-07-12 19:27:39,169 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 [2022-07-12 19:27:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 19:27:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-12 19:27:39,205 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-12 19:27:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:27:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:27:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:27:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:27:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:27:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 19:27:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:27:39,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:27:39,344 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:27:39,345 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:27:39,681 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:27:39,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:27:39,688 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 19:27:39,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:27:39 BoogieIcfgContainer [2022-07-12 19:27:39,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:27:39,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:27:39,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:27:39,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:27:39,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:27:38" (1/3) ... [2022-07-12 19:27:39,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7805759a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:27:39, skipping insertion in model container [2022-07-12 19:27:39,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:27:38" (2/3) ... [2022-07-12 19:27:39,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7805759a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:27:39, skipping insertion in model container [2022-07-12 19:27:39,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:27:39" (3/3) ... [2022-07-12 19:27:39,699 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-12 19:27:39,729 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:27:39,730 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-12 19:27:39,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:27:39,792 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@1c569921, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5a2d3dd8 [2022-07-12 19:27:39,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-12 19:27:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:27:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:27:39,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:39,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:27:39,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:39,816 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-12 19:27:39,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:39,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466602084] [2022-07-12 19:27:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:39,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:40,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:40,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466602084] [2022-07-12 19:27:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466602084] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:40,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:40,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:27:40,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242302350] [2022-07-12 19:27:40,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:40,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:27:40,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:40,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:27:40,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:27:40,102 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:40,241 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-07-12 19:27:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:27:40,244 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 [2022-07-12 19:27:40,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:40,253 INFO L225 Difference]: With dead ends: 124 [2022-07-12 19:27:40,253 INFO L226 Difference]: Without dead ends: 118 [2022-07-12 19:27:40,255 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 [2022-07-12 19:27:40,274 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:40,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-12 19:27:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2022-07-12 19:27:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-12 19:27:40,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2022-07-12 19:27:40,358 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2022-07-12 19:27:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:40,359 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2022-07-12 19:27:40,359 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) [2022-07-12 19:27:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2022-07-12 19:27:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:27:40,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:40,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:27:40,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 19:27:40,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:40,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-12 19:27:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:40,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886355775] [2022-07-12 19:27:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:40,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:40,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:40,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886355775] [2022-07-12 19:27:40,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886355775] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:40,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:40,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:27:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415189456] [2022-07-12 19:27:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:40,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:40,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:40,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:40,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:40,569 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:40,747 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2022-07-12 19:27:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:27:40,748 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 [2022-07-12 19:27:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:40,751 INFO L225 Difference]: With dead ends: 221 [2022-07-12 19:27:40,752 INFO L226 Difference]: Without dead ends: 221 [2022-07-12 19:27:40,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:27:40,753 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:40,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 207 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-12 19:27:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2022-07-12 19:27:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 150 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-12 19:27:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2022-07-12 19:27:40,798 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2022-07-12 19:27:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:40,798 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2022-07-12 19:27:40,798 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) [2022-07-12 19:27:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2022-07-12 19:27:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 19:27:40,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:40,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 19:27:40,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-12 19:27:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622793894] [2022-07-12 19:27:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:41,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:41,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622793894] [2022-07-12 19:27:41,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622793894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:41,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:41,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:27:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413366669] [2022-07-12 19:27:41,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:41,022 INFO L87 Difference]: Start difference. First operand 168 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:41,191 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2022-07-12 19:27:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:41,192 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 [2022-07-12 19:27:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:41,198 INFO L225 Difference]: With dead ends: 244 [2022-07-12 19:27:41,198 INFO L226 Difference]: Without dead ends: 244 [2022-07-12 19:27:41,198 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 [2022-07-12 19:27:41,200 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:41,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-12 19:27:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-07-12 19:27:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 153 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-12 19:27:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2022-07-12 19:27:41,240 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2022-07-12 19:27:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:41,241 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2022-07-12 19:27:41,241 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) [2022-07-12 19:27:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2022-07-12 19:27:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 19:27:41,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:41,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:41,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 19:27:41,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-12 19:27:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:41,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489415254] [2022-07-12 19:27:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:41,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:41,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489415254] [2022-07-12 19:27:41,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489415254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:41,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:41,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:27:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252777716] [2022-07-12 19:27:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:41,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:41,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:41,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:41,447 INFO L87 Difference]: Start difference. First operand 171 states and 264 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:41,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:41,565 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2022-07-12 19:27:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:41,566 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 [2022-07-12 19:27:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:41,569 INFO L225 Difference]: With dead ends: 223 [2022-07-12 19:27:41,569 INFO L226 Difference]: Without dead ends: 223 [2022-07-12 19:27:41,570 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 [2022-07-12 19:27:41,572 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:41,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-12 19:27:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2022-07-12 19:27:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 153 states have internal predecessors, (217), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-12 19:27:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2022-07-12 19:27:41,588 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2022-07-12 19:27:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:41,589 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2022-07-12 19:27:41,589 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) [2022-07-12 19:27:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2022-07-12 19:27:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 19:27:41,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:41,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:41,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 19:27:41,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-12 19:27:41,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:41,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404000662] [2022-07-12 19:27:41,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:41,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404000662] [2022-07-12 19:27:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404000662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:41,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:41,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:27:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124417471] [2022-07-12 19:27:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:41,654 INFO L87 Difference]: Start difference. First operand 171 states and 262 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:41,741 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2022-07-12 19:27:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:41,741 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 [2022-07-12 19:27:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:41,743 INFO L225 Difference]: With dead ends: 250 [2022-07-12 19:27:41,743 INFO L226 Difference]: Without dead ends: 250 [2022-07-12 19:27:41,743 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 [2022-07-12 19:27:41,745 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:41,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-12 19:27:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2022-07-12 19:27:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 188 states have internal predecessors, (267), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-12 19:27:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2022-07-12 19:27:41,774 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2022-07-12 19:27:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:41,776 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2022-07-12 19:27:41,776 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) [2022-07-12 19:27:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2022-07-12 19:27:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 19:27:41,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:41,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:41,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 19:27:41,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:41,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:41,783 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-12 19:27:41,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:41,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718419222] [2022-07-12 19:27:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:41,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:41,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718419222] [2022-07-12 19:27:41,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718419222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:41,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:41,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:27:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046134383] [2022-07-12 19:27:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:41,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:41,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:41,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:41,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:41,852 INFO L87 Difference]: Start difference. First operand 207 states and 312 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:41,938 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2022-07-12 19:27:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:41,939 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 [2022-07-12 19:27:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:41,940 INFO L225 Difference]: With dead ends: 245 [2022-07-12 19:27:41,940 INFO L226 Difference]: Without dead ends: 245 [2022-07-12 19:27:41,941 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 [2022-07-12 19:27:41,943 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:41,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:41,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-12 19:27:41,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2022-07-12 19:27:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 198 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-07-12 19:27:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2022-07-12 19:27:41,962 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2022-07-12 19:27:41,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:41,962 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2022-07-12 19:27:41,962 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) [2022-07-12 19:27:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2022-07-12 19:27:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:27:41,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:41,964 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:41,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 19:27:41,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-12 19:27:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:41,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671351363] [2022-07-12 19:27:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:41,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:42,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:42,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671351363] [2022-07-12 19:27:42,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671351363] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334320985] [2022-07-12 19:27:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:42,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:42,095 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) [2022-07-12 19:27:42,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 19:27:42,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 19:27:42,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:42,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:42,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334320985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:42,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:42,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-07-12 19:27:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613444518] [2022-07-12 19:27:42,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:42,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 19:27:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:42,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 19:27:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:27:42,502 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:42,767 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2022-07-12 19:27:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:27:42,768 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 [2022-07-12 19:27:42,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:42,772 INFO L225 Difference]: With dead ends: 302 [2022-07-12 19:27:42,773 INFO L226 Difference]: Without dead ends: 302 [2022-07-12 19:27:42,773 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 [2022-07-12 19:27:42,774 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 415 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:42,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:27:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-12 19:27:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2022-07-12 19:27:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.4893617021276595) internal successors, (280), 210 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-07-12 19:27:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2022-07-12 19:27:42,790 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2022-07-12 19:27:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:42,790 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2022-07-12 19:27:42,790 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) [2022-07-12 19:27:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2022-07-12 19:27:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 19:27:42,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:42,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:42,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:43,007 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 [2022-07-12 19:27:43,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:43,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:43,008 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-12 19:27:43,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:43,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141802412] [2022-07-12 19:27:43,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:43,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:43,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141802412] [2022-07-12 19:27:43,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141802412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944798308] [2022-07-12 19:27:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:43,137 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) [2022-07-12 19:27:43,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 19:27:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:27:43,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:43,324 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 [2022-07-12 19:27:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:43,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944798308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:43,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:43,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-12 19:27:43,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827168484] [2022-07-12 19:27:43,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:43,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 19:27:43,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:43,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 19:27:43,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:27:43,402 INFO L87 Difference]: Start difference. First operand 229 states and 335 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:43,702 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2022-07-12 19:27:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 19:27:43,703 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 [2022-07-12 19:27:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:43,705 INFO L225 Difference]: With dead ends: 335 [2022-07-12 19:27:43,705 INFO L226 Difference]: Without dead ends: 335 [2022-07-12 19:27:43,705 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 [2022-07-12 19:27:43,706 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:43,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 411 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:27:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-12 19:27:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2022-07-12 19:27:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.482233502538071) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2022-07-12 19:27:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2022-07-12 19:27:43,729 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2022-07-12 19:27:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:43,729 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2022-07-12 19:27:43,729 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) [2022-07-12 19:27:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2022-07-12 19:27:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 19:27:43,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:43,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:43,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:43,955 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 [2022-07-12 19:27:43,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-12 19:27:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:43,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302103839] [2022-07-12 19:27:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:43,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:44,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:44,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302103839] [2022-07-12 19:27:44,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302103839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949332680] [2022-07-12 19:27:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:44,091 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) [2022-07-12 19:27:44,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 19:27:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 19:27:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:44,304 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 [2022-07-12 19:27:44,313 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 [2022-07-12 19:27:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:44,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:44,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949332680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:44,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:44,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2022-07-12 19:27:44,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167987804] [2022-07-12 19:27:44,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:44,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 19:27:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 19:27:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-12 19:27:44,440 INFO L87 Difference]: Start difference. First operand 239 states and 349 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:45,057 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2022-07-12 19:27:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:27:45,058 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 [2022-07-12 19:27:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:45,061 INFO L225 Difference]: With dead ends: 570 [2022-07-12 19:27:45,061 INFO L226 Difference]: Without dead ends: 570 [2022-07-12 19:27:45,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-07-12 19:27:45,062 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 502 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:45,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 748 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:27:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-07-12 19:27:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2022-07-12 19:27:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.5136054421768708) internal successors, (445), 322 states have internal predecessors, (445), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2022-07-12 19:27:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-12 19:27:45,080 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2022-07-12 19:27:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:45,080 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-12 19:27:45,080 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) [2022-07-12 19:27:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-12 19:27:45,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 19:27:45,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:45,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:45,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:45,305 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 [2022-07-12 19:27:45,306 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:45,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-12 19:27:45,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:45,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977307821] [2022-07-12 19:27:45,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977307821] [2022-07-12 19:27:45,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977307821] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:45,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:45,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:27:45,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543164638] [2022-07-12 19:27:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:45,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:27:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:27:45,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:27:45,354 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:27:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:45,373 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2022-07-12 19:27:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:27:45,373 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 [2022-07-12 19:27:45,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:45,375 INFO L225 Difference]: With dead ends: 356 [2022-07-12 19:27:45,375 INFO L226 Difference]: Without dead ends: 356 [2022-07-12 19:27:45,376 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 [2022-07-12 19:27:45,376 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:45,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:27:45,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-12 19:27:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2022-07-12 19:27:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.5067567567567568) internal successors, (446), 323 states have internal predecessors, (446), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-07-12 19:27:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2022-07-12 19:27:45,386 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2022-07-12 19:27:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:45,387 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2022-07-12 19:27:45,387 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) [2022-07-12 19:27:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2022-07-12 19:27:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 19:27:45,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:45,388 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] [2022-07-12 19:27:45,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 19:27:45,389 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-12 19:27:45,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:45,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602437618] [2022-07-12 19:27:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:45,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602437618] [2022-07-12 19:27:45,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602437618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:45,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:27:45,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 19:27:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197013827] [2022-07-12 19:27:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:45,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:27:45,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:27:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:27:45,430 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:27:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:45,488 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2022-07-12 19:27:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:27:45,489 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 [2022-07-12 19:27:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:45,491 INFO L225 Difference]: With dead ends: 263 [2022-07-12 19:27:45,491 INFO L226 Difference]: Without dead ends: 263 [2022-07-12 19:27:45,491 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 [2022-07-12 19:27:45,492 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:45,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-12 19:27:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-12 19:27:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 224 states have (on average 1.4910714285714286) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-07-12 19:27:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2022-07-12 19:27:45,500 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2022-07-12 19:27:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:45,500 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2022-07-12 19:27:45,500 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) [2022-07-12 19:27:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2022-07-12 19:27:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 19:27:45,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:45,501 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] [2022-07-12 19:27:45,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 19:27:45,502 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:45,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-12 19:27:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:45,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122091451] [2022-07-12 19:27:45,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:45,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:45,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122091451] [2022-07-12 19:27:45,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122091451] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:45,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324479800] [2022-07-12 19:27:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:45,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:45,680 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) [2022-07-12 19:27:45,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 19:27:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:27:45,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:45,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:27:45,990 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 [2022-07-12 19:27:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:46,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:48,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324479800] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:48,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:27:48,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-12 19:27:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166099977] [2022-07-12 19:27:48,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:48,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 19:27:48,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 19:27:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:27:48,197 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:27:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:48,943 INFO L93 Difference]: Finished difference Result 414 states and 529 transitions. [2022-07-12 19:27:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 19:27:48,944 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 [2022-07-12 19:27:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:48,946 INFO L225 Difference]: With dead ends: 414 [2022-07-12 19:27:48,946 INFO L226 Difference]: Without dead ends: 414 [2022-07-12 19:27:48,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2022-07-12 19:27:48,947 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 606 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:48,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 322 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 323 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-07-12 19:27:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-07-12 19:27:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 321. [2022-07-12 19:27:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 279 states have (on average 1.4838709677419355) internal successors, (414), 304 states have internal predecessors, (414), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-12 19:27:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2022-07-12 19:27:48,969 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2022-07-12 19:27:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:48,969 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2022-07-12 19:27:48,970 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) [2022-07-12 19:27:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2022-07-12 19:27:48,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:27:48,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:48,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:49,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:49,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:49,195 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:49,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:49,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-12 19:27:49,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:49,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881927528] [2022-07-12 19:27:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:49,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:49,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881927528] [2022-07-12 19:27:49,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881927528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:49,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684260182] [2022-07-12 19:27:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:49,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:49,299 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) [2022-07-12 19:27:49,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 19:27:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 19:27:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:49,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:27:49,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684260182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:49,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:27:49,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2022-07-12 19:27:49,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433246865] [2022-07-12 19:27:49,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:49,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 19:27:49,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:49,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 19:27:49,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:27:49,480 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:27:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:49,575 INFO L93 Difference]: Finished difference Result 416 states and 561 transitions. [2022-07-12 19:27:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:27:49,576 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 [2022-07-12 19:27:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:49,577 INFO L225 Difference]: With dead ends: 416 [2022-07-12 19:27:49,577 INFO L226 Difference]: Without dead ends: 416 [2022-07-12 19:27:49,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:27:49,578 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:49,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-07-12 19:27:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 344. [2022-07-12 19:27:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 302 states have (on average 1.4735099337748345) internal successors, (445), 327 states have internal predecessors, (445), 9 states have call successors, (9), 7 states have call predecessors, (9), 15 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-07-12 19:27:49,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-07-12 19:27:49,587 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 28 [2022-07-12 19:27:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:49,588 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-07-12 19:27:49,588 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) [2022-07-12 19:27:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-07-12 19:27:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:27:49,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:49,589 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] [2022-07-12 19:27:49,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:49,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-12 19:27:49,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-12 19:27:49,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:49,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987300707] [2022-07-12 19:27:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:49,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:50,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987300707] [2022-07-12 19:27:50,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987300707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460285005] [2022-07-12 19:27:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:50,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:50,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:50,212 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) [2022-07-12 19:27:50,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 19:27:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:50,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:27:50,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:50,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:27:50,628 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 [2022-07-12 19:27:50,714 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 [2022-07-12 19:27:50,718 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 [2022-07-12 19:27:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:50,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:50,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460285005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:50,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:27:50,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-12 19:27:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336533923] [2022-07-12 19:27:50,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 19:27:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 19:27:50,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-12 19:27:50,900 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:27:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:52,346 INFO L93 Difference]: Finished difference Result 554 states and 693 transitions. [2022-07-12 19:27:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 19:27:52,348 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 [2022-07-12 19:27:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:52,350 INFO L225 Difference]: With dead ends: 554 [2022-07-12 19:27:52,350 INFO L226 Difference]: Without dead ends: 554 [2022-07-12 19:27:52,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 19:27:52,352 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 691 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:52,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 505 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2022-07-12 19:27:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-07-12 19:27:52,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 401. [2022-07-12 19:27:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 356 states have (on average 1.4915730337078652) internal successors, (531), 382 states have internal predecessors, (531), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-07-12 19:27:52,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 571 transitions. [2022-07-12 19:27:52,364 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 571 transitions. Word has length 29 [2022-07-12 19:27:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:52,366 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 571 transitions. [2022-07-12 19:27:52,366 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) [2022-07-12 19:27:52,366 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 571 transitions. [2022-07-12 19:27:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 19:27:52,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:52,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:52,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:52,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:52,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:52,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-07-12 19:27:52,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:52,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609935494] [2022-07-12 19:27:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:52,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:52,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609935494] [2022-07-12 19:27:52,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609935494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398020565] [2022-07-12 19:27:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:52,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:52,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:52,670 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) [2022-07-12 19:27:52,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 19:27:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:27:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:52,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398020565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:52,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:52,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-12 19:27:52,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157059912] [2022-07-12 19:27:52,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:52,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:27:52,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:52,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:27:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:27:52,911 INFO L87 Difference]: Start difference. First operand 401 states and 571 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:27:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:53,192 INFO L93 Difference]: Finished difference Result 558 states and 726 transitions. [2022-07-12 19:27:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:27:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-07-12 19:27:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:53,195 INFO L225 Difference]: With dead ends: 558 [2022-07-12 19:27:53,195 INFO L226 Difference]: Without dead ends: 558 [2022-07-12 19:27:53,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:27:53,196 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 389 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:53,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 213 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:27:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-12 19:27:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 478. [2022-07-12 19:27:53,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 431 states have (on average 1.443155452436195) internal successors, (622), 457 states have internal predecessors, (622), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-07-12 19:27:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 659 transitions. [2022-07-12 19:27:53,209 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 659 transitions. Word has length 30 [2022-07-12 19:27:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:53,209 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 659 transitions. [2022-07-12 19:27:53,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:27:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 659 transitions. [2022-07-12 19:27:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-12 19:27:53,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:53,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:27:53,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:53,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:53,431 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:53,432 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-07-12 19:27:53,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:53,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560016378] [2022-07-12 19:27:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:53,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:53,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:53,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560016378] [2022-07-12 19:27:53,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560016378] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:53,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841994804] [2022-07-12 19:27:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:53,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:53,520 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) [2022-07-12 19:27:53,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 19:27:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:53,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 19:27:53,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:53,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 19:27:53,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841994804] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:53,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:53,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-12 19:27:53,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72903352] [2022-07-12 19:27:53,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:53,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 19:27:53,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 19:27:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:27:53,830 INFO L87 Difference]: Start difference. First operand 478 states and 659 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:27:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:54,264 INFO L93 Difference]: Finished difference Result 533 states and 692 transitions. [2022-07-12 19:27:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:27:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-07-12 19:27:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:54,266 INFO L225 Difference]: With dead ends: 533 [2022-07-12 19:27:54,266 INFO L226 Difference]: Without dead ends: 533 [2022-07-12 19:27:54,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-12 19:27:54,267 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 498 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:54,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 332 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:27:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-12 19:27:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 484. [2022-07-12 19:27:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.425629290617849) internal successors, (623), 463 states have internal predecessors, (623), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 659 transitions. [2022-07-12 19:27:54,281 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 659 transitions. Word has length 31 [2022-07-12 19:27:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:54,281 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 659 transitions. [2022-07-12 19:27:54,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:27:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 659 transitions. [2022-07-12 19:27:54,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 19:27:54,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:54,283 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] [2022-07-12 19:27:54,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 19:27:54,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 19:27:54,507 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-12 19:27:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:54,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83775351] [2022-07-12 19:27:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:54,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:54,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:54,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83775351] [2022-07-12 19:27:54,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83775351] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:54,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320120124] [2022-07-12 19:27:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:54,690 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) [2022-07-12 19:27:54,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 19:27:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:54,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-12 19:27:54,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:27:54,991 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 [2022-07-12 19:27:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:55,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:55,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320120124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:55,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:27:55,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-12 19:27:55,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192835127] [2022-07-12 19:27:55,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:55,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 19:27:55,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 19:27:55,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-07-12 19:27:55,326 INFO L87 Difference]: Start difference. First operand 484 states and 659 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:27:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:56,163 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2022-07-12 19:27:56,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 19:27:56,164 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 [2022-07-12 19:27:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:56,166 INFO L225 Difference]: With dead ends: 555 [2022-07-12 19:27:56,166 INFO L226 Difference]: Without dead ends: 555 [2022-07-12 19:27:56,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 19:27:56,167 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 451 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:56,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 427 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 542 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-07-12 19:27:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-12 19:27:56,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 484. [2022-07-12 19:27:56,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 437 states have (on average 1.3958810068649885) internal successors, (610), 463 states have internal predecessors, (610), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:56,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 646 transitions. [2022-07-12 19:27:56,178 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 646 transitions. Word has length 35 [2022-07-12 19:27:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:56,179 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 646 transitions. [2022-07-12 19:27:56,179 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) [2022-07-12 19:27:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 646 transitions. [2022-07-12 19:27:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 19:27:56,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:56,179 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] [2022-07-12 19:27:56,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:56,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-12 19:27:56,399 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-12 19:27:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:56,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178851575] [2022-07-12 19:27:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:56,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:56,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178851575] [2022-07-12 19:27:56,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178851575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:56,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11522384] [2022-07-12 19:27:56,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:56,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:56,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:56,466 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) [2022-07-12 19:27:56,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 19:27:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:56,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:27:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:56,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11522384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:56,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:56,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-12 19:27:56,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435062596] [2022-07-12 19:27:56,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:56,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:56,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:56,630 INFO L87 Difference]: Start difference. First operand 484 states and 646 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:27:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:56,721 INFO L93 Difference]: Finished difference Result 513 states and 669 transitions. [2022-07-12 19:27:56,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:56,721 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 [2022-07-12 19:27:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:56,723 INFO L225 Difference]: With dead ends: 513 [2022-07-12 19:27:56,723 INFO L226 Difference]: Without dead ends: 513 [2022-07-12 19:27:56,723 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 [2022-07-12 19:27:56,724 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 84 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:56,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 70 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-07-12 19:27:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 482. [2022-07-12 19:27:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 437 states have (on average 1.3775743707093822) internal successors, (602), 461 states have internal predecessors, (602), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 638 transitions. [2022-07-12 19:27:56,738 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 638 transitions. Word has length 40 [2022-07-12 19:27:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:56,738 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 638 transitions. [2022-07-12 19:27:56,738 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) [2022-07-12 19:27:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 638 transitions. [2022-07-12 19:27:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:27:56,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:56,739 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] [2022-07-12 19:27:56,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:56,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 19:27:56,955 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-12 19:27:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093952789] [2022-07-12 19:27:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093952789] [2022-07-12 19:27:57,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093952789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:57,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006527614] [2022-07-12 19:27:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:57,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:57,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:57,030 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) [2022-07-12 19:27:57,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 19:27:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:27:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006527614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:57,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:57,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-07-12 19:27:57,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531476571] [2022-07-12 19:27:57,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:57,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:57,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:57,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:27:57,205 INFO L87 Difference]: Start difference. First operand 482 states and 638 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:27:57,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:57,308 INFO L93 Difference]: Finished difference Result 511 states and 661 transitions. [2022-07-12 19:27:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:57,309 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 [2022-07-12 19:27:57,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:57,311 INFO L225 Difference]: With dead ends: 511 [2022-07-12 19:27:57,311 INFO L226 Difference]: Without dead ends: 511 [2022-07-12 19:27:57,312 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 [2022-07-12 19:27:57,312 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:57,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:27:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-07-12 19:27:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 480. [2022-07-12 19:27:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 437 states have (on average 1.3592677345537758) internal successors, (594), 459 states have internal predecessors, (594), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 630 transitions. [2022-07-12 19:27:57,325 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 630 transitions. Word has length 41 [2022-07-12 19:27:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:57,326 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 630 transitions. [2022-07-12 19:27:57,326 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) [2022-07-12 19:27:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 630 transitions. [2022-07-12 19:27:57,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 19:27:57,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:57,327 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] [2022-07-12 19:27:57,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 19:27:57,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:57,552 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:57,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-12 19:27:57,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:57,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75466730] [2022-07-12 19:27:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75466730] [2022-07-12 19:27:57,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75466730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896764588] [2022-07-12 19:27:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:57,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:57,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:57,616 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) [2022-07-12 19:27:57,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 19:27:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:27:57,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:57,702 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 [2022-07-12 19:27:57,742 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:27:57,743 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 [2022-07-12 19:27:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:27:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:57,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896764588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:27:57,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:27:57,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-07-12 19:27:57,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85012869] [2022-07-12 19:27:57,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:27:57,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:27:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:57,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:27:57,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:27:57,894 INFO L87 Difference]: Start difference. First operand 480 states and 630 transitions. Second operand has 7 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:27:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:58,028 INFO L93 Difference]: Finished difference Result 532 states and 675 transitions. [2022-07-12 19:27:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:27:58,029 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 [2022-07-12 19:27:58,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:58,031 INFO L225 Difference]: With dead ends: 532 [2022-07-12 19:27:58,031 INFO L226 Difference]: Without dead ends: 532 [2022-07-12 19:27:58,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:27:58,032 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 83 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:58,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 170 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-07-12 19:27:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-07-12 19:27:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 486. [2022-07-12 19:27:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 443 states have (on average 1.3544018058690745) internal successors, (600), 465 states have internal predecessors, (600), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 636 transitions. [2022-07-12 19:27:58,043 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 636 transitions. Word has length 42 [2022-07-12 19:27:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:58,044 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 636 transitions. [2022-07-12 19:27:58,044 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) [2022-07-12 19:27:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 636 transitions. [2022-07-12 19:27:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-12 19:27:58,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:58,045 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] [2022-07-12 19:27:58,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:58,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:58,262 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:58,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:58,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1200736699, now seen corresponding path program 1 times [2022-07-12 19:27:58,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:58,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231370161] [2022-07-12 19:27:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:58,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:27:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231370161] [2022-07-12 19:27:58,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231370161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:58,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317154590] [2022-07-12 19:27:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:58,313 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) [2022-07-12 19:27:58,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 19:27:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:27:58,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:27:58,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:27:58,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317154590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:27:58,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:27:58,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-07-12 19:27:58,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937919486] [2022-07-12 19:27:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:27:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:27:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:27:58,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:27:58,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:27:58,431 INFO L87 Difference]: Start difference. First operand 486 states and 636 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:27:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:27:58,455 INFO L93 Difference]: Finished difference Result 580 states and 722 transitions. [2022-07-12 19:27:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:27:58,456 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 [2022-07-12 19:27:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:27:58,458 INFO L225 Difference]: With dead ends: 580 [2022-07-12 19:27:58,459 INFO L226 Difference]: Without dead ends: 580 [2022-07-12 19:27:58,459 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 [2022-07-12 19:27:58,459 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 68 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:27:58,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 156 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:27:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-07-12 19:27:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 476. [2022-07-12 19:27:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 433 states have (on average 1.327944572748268) internal successors, (575), 455 states have internal predecessors, (575), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:27:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 611 transitions. [2022-07-12 19:27:58,475 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 611 transitions. Word has length 45 [2022-07-12 19:27:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:27:58,476 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 611 transitions. [2022-07-12 19:27:58,476 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) [2022-07-12 19:27:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 611 transitions. [2022-07-12 19:27:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:27:58,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:27:58,477 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] [2022-07-12 19:27:58,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 19:27:58,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-12 19:27:58,687 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:27:58,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:27:58,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-12 19:27:58,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:27:58,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957943174] [2022-07-12 19:27:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:58,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:27:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:27:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:27:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 19:27:58,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:27:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957943174] [2022-07-12 19:27:58,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957943174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:27:58,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709743557] [2022-07-12 19:27:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:27:58,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:27:58,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:27:58,851 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) [2022-07-12 19:27:58,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 19:27:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:27:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 19:27:58,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:27:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:27:59,262 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 [2022-07-12 19:27:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:27:59,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:03,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709743557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:03,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:03,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2022-07-12 19:28:03,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732683876] [2022-07-12 19:28:03,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:03,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 19:28:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:03,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 19:28:03,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:28:03,428 INFO L87 Difference]: Start difference. First operand 476 states and 611 transitions. Second operand has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:28:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:03,938 INFO L93 Difference]: Finished difference Result 573 states and 691 transitions. [2022-07-12 19:28:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 19:28:03,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-07-12 19:28:03,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:03,941 INFO L225 Difference]: With dead ends: 573 [2022-07-12 19:28:03,941 INFO L226 Difference]: Without dead ends: 573 [2022-07-12 19:28:03,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2022-07-12 19:28:03,942 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 454 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:03,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 422 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 352 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-07-12 19:28:03,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-12 19:28:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 480. [2022-07-12 19:28:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 438 states have (on average 1.321917808219178) internal successors, (579), 459 states have internal predecessors, (579), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-12 19:28:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 613 transitions. [2022-07-12 19:28:03,953 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 613 transitions. Word has length 48 [2022-07-12 19:28:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 613 transitions. [2022-07-12 19:28:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 10 states have internal predecessors, (61), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:28:03,954 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 613 transitions. [2022-07-12 19:28:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 19:28:03,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:03,954 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] [2022-07-12 19:28:03,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:04,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-12 19:28:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:04,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794225003] [2022-07-12 19:28:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:04,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:04,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794225003] [2022-07-12 19:28:04,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794225003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833900099] [2022-07-12 19:28:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:04,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:04,213 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) [2022-07-12 19:28:04,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 19:28:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:28:04,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:28:04,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:04,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833900099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:04,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:28:04,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-12 19:28:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208591175] [2022-07-12 19:28:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:04,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:04,289 INFO L87 Difference]: Start difference. First operand 480 states and 613 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:04,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:04,293 INFO L93 Difference]: Finished difference Result 506 states and 634 transitions. [2022-07-12 19:28:04,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:04,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-07-12 19:28:04,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:04,295 INFO L225 Difference]: With dead ends: 506 [2022-07-12 19:28:04,295 INFO L226 Difference]: Without dead ends: 506 [2022-07-12 19:28:04,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:04,300 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:04,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 110 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-12 19:28:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 479. [2022-07-12 19:28:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 438 states have (on average 1.3082191780821917) internal successors, (573), 458 states have internal predecessors, (573), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (24), 10 states have call predecessors, (24), 10 states have call successors, (24) [2022-07-12 19:28:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 607 transitions. [2022-07-12 19:28:04,311 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 607 transitions. Word has length 47 [2022-07-12 19:28:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:04,311 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 607 transitions. [2022-07-12 19:28:04,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 607 transitions. [2022-07-12 19:28:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:28:04,312 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:04,312 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] [2022-07-12 19:28:04,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:04,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:04,531 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:04,532 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2022-07-12 19:28:04,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920132978] [2022-07-12 19:28:04,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:04,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:04,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:04,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920132978] [2022-07-12 19:28:04,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920132978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:04,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919215233] [2022-07-12 19:28:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:04,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:04,624 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) [2022-07-12 19:28:04,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 19:28:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:04,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:28:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:04,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:04,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919215233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:04,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:04,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-07-12 19:28:04,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663841667] [2022-07-12 19:28:04,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:04,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 19:28:04,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:04,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 19:28:04,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-12 19:28:04,829 INFO L87 Difference]: Start difference. First operand 479 states and 607 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 19:28:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:05,037 INFO L93 Difference]: Finished difference Result 399 states and 478 transitions. [2022-07-12 19:28:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:28:05,037 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 [2022-07-12 19:28:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:05,039 INFO L225 Difference]: With dead ends: 399 [2022-07-12 19:28:05,039 INFO L226 Difference]: Without dead ends: 399 [2022-07-12 19:28:05,039 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 [2022-07-12 19:28:05,040 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 239 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:05,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 128 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:28:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-12 19:28:05,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 368. [2022-07-12 19:28:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 334 states have (on average 1.2754491017964071) internal successors, (426), 351 states have internal predecessors, (426), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:28:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 450 transitions. [2022-07-12 19:28:05,048 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 450 transitions. Word has length 48 [2022-07-12 19:28:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:05,048 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 450 transitions. [2022-07-12 19:28:05,048 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) [2022-07-12 19:28:05,048 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 450 transitions. [2022-07-12 19:28:05,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:28:05,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:05,049 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:05,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:05,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-12 19:28:05,264 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2022-07-12 19:28:05,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:05,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664317096] [2022-07-12 19:28:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:05,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:05,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664317096] [2022-07-12 19:28:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664317096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526914079] [2022-07-12 19:28:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:05,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:05,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:05,309 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) [2022-07-12 19:28:05,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 19:28:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:05,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:28:05,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:28:05,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526914079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:05,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:28:05,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2022-07-12 19:28:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098787884] [2022-07-12 19:28:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:05,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:28:05,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:05,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:28:05,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:28:05,447 INFO L87 Difference]: Start difference. First operand 368 states and 450 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:05,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:05,473 INFO L93 Difference]: Finished difference Result 384 states and 462 transitions. [2022-07-12 19:28:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:28:05,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-07-12 19:28:05,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:05,475 INFO L225 Difference]: With dead ends: 384 [2022-07-12 19:28:05,475 INFO L226 Difference]: Without dead ends: 384 [2022-07-12 19:28:05,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 19:28:05,476 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:05,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 92 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-12 19:28:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 367. [2022-07-12 19:28:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 334 states have (on average 1.2604790419161678) internal successors, (421), 350 states have internal predecessors, (421), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:28:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 445 transitions. [2022-07-12 19:28:05,483 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 445 transitions. Word has length 48 [2022-07-12 19:28:05,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:05,483 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 445 transitions. [2022-07-12 19:28:05,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 445 transitions. [2022-07-12 19:28:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:28:05,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:05,484 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] [2022-07-12 19:28:05,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:05,706 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-12 19:28:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:05,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216818732] [2022-07-12 19:28:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:05,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:05,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-12 19:28:06,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216818732] [2022-07-12 19:28:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216818732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162475465] [2022-07-12 19:28:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:06,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:06,042 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) [2022-07-12 19:28:06,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 19:28:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 19:28:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:06,599 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 [2022-07-12 19:28:06,679 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 [2022-07-12 19:28:06,684 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 [2022-07-12 19:28:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:06,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:06,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162475465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:06,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:06,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-07-12 19:28:06,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425530161] [2022-07-12 19:28:06,842 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:06,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 19:28:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:06,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 19:28:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-12 19:28:06,844 INFO L87 Difference]: Start difference. First operand 367 states and 445 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:28:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:07,704 INFO L93 Difference]: Finished difference Result 418 states and 477 transitions. [2022-07-12 19:28:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 19:28:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-07-12 19:28:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:07,706 INFO L225 Difference]: With dead ends: 418 [2022-07-12 19:28:07,707 INFO L226 Difference]: Without dead ends: 418 [2022-07-12 19:28:07,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 19:28:07,708 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 401 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:07,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 395 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 483 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-07-12 19:28:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-07-12 19:28:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 366. [2022-07-12 19:28:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 334 states have (on average 1.2574850299401197) internal successors, (420), 349 states have internal predecessors, (420), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 442 transitions. [2022-07-12 19:28:07,714 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 442 transitions. Word has length 50 [2022-07-12 19:28:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:07,715 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 442 transitions. [2022-07-12 19:28:07,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:28:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 442 transitions. [2022-07-12 19:28:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 19:28:07,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:07,716 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:07,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:07,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:07,939 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:07,940 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2022-07-12 19:28:07,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:07,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461814658] [2022-07-12 19:28:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:07,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:07,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:07,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:07,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461814658] [2022-07-12 19:28:07,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461814658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:07,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835121441] [2022-07-12 19:28:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:07,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:07,983 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) [2022-07-12 19:28:08,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 19:28:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:28:08,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:28:08,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:08,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835121441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:08,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:28:08,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-07-12 19:28:08,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762836194] [2022-07-12 19:28:08,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:08,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:08,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:08,067 INFO L87 Difference]: Start difference. First operand 366 states and 442 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:08,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:08,071 INFO L93 Difference]: Finished difference Result 384 states and 456 transitions. [2022-07-12 19:28:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-07-12 19:28:08,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:08,073 INFO L225 Difference]: With dead ends: 384 [2022-07-12 19:28:08,073 INFO L226 Difference]: Without dead ends: 384 [2022-07-12 19:28:08,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:08,074 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:08,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 107 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-07-12 19:28:08,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 365. [2022-07-12 19:28:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2425149700598803) internal successors, (415), 348 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:08,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2022-07-12 19:28:08,081 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 49 [2022-07-12 19:28:08,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:08,081 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2022-07-12 19:28:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:08,081 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2022-07-12 19:28:08,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:28:08,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:08,082 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:08,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:08,307 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:08,307 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-12 19:28:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:08,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823162618] [2022-07-12 19:28:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:08,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:08,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:08,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:08,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823162618] [2022-07-12 19:28:08,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823162618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:08,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028372403] [2022-07-12 19:28:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:08,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:08,378 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) [2022-07-12 19:28:08,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 19:28:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:28:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:08,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028372403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:08,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:08,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-07-12 19:28:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094675968] [2022-07-12 19:28:08,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:08,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:28:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:08,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:28:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:28:08,693 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 19:28:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:08,928 INFO L93 Difference]: Finished difference Result 402 states and 463 transitions. [2022-07-12 19:28:08,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:28:08,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-12 19:28:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:08,930 INFO L225 Difference]: With dead ends: 402 [2022-07-12 19:28:08,930 INFO L226 Difference]: Without dead ends: 402 [2022-07-12 19:28:08,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-12 19:28:08,931 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 265 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:08,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 193 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:28:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-12 19:28:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 365. [2022-07-12 19:28:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2335329341317365) internal successors, (412), 348 states have internal predecessors, (412), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 434 transitions. [2022-07-12 19:28:08,937 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 434 transitions. Word has length 51 [2022-07-12 19:28:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:08,937 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 434 transitions. [2022-07-12 19:28:08,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 19:28:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 434 transitions. [2022-07-12 19:28:08,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:28:08,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:08,938 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] [2022-07-12 19:28:08,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:09,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 19:28:09,156 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:09,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:09,156 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-12 19:28:09,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895671478] [2022-07-12 19:28:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:09,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:09,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:09,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:09,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895671478] [2022-07-12 19:28:09,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895671478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:09,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270401874] [2022-07-12 19:28:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:09,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:09,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:09,320 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) [2022-07-12 19:28:09,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 19:28:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-12 19:28:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:09,490 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:28:09,491 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 [2022-07-12 19:28:09,586 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:28:09,586 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 [2022-07-12 19:28:09,632 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:28:09,633 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 [2022-07-12 19:28:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:09,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:09,742 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:28:09,742 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 [2022-07-12 19:28:09,914 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:28:09,915 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 [2022-07-12 19:28:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:10,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270401874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:10,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:10,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 26 [2022-07-12 19:28:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222498659] [2022-07-12 19:28:10,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 19:28:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 19:28:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-07-12 19:28:10,096 INFO L87 Difference]: Start difference. First operand 365 states and 434 transitions. Second operand has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 19:28:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:10,369 INFO L93 Difference]: Finished difference Result 393 states and 460 transitions. [2022-07-12 19:28:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:28:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2022-07-12 19:28:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:10,371 INFO L225 Difference]: With dead ends: 393 [2022-07-12 19:28:10,371 INFO L226 Difference]: Without dead ends: 393 [2022-07-12 19:28:10,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 19:28:10,372 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 416 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:10,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 96 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 184 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-07-12 19:28:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-12 19:28:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 365. [2022-07-12 19:28:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.2305389221556886) internal successors, (411), 348 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 433 transitions. [2022-07-12 19:28:10,377 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 433 transitions. Word has length 51 [2022-07-12 19:28:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:10,377 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 433 transitions. [2022-07-12 19:28:10,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 5.28) internal successors, (132), 25 states have internal predecessors, (132), 6 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 19:28:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 433 transitions. [2022-07-12 19:28:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:28:10,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:10,378 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] [2022-07-12 19:28:10,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:10,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-12 19:28:10,579 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-12 19:28:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157627499] [2022-07-12 19:28:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:10,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:10,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:10,712 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:10,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:10,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157627499] [2022-07-12 19:28:10,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157627499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:10,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690818594] [2022-07-12 19:28:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:10,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:10,715 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) [2022-07-12 19:28:10,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 19:28:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:28:10,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:10,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:10,930 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 [2022-07-12 19:28:10,938 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:28:10,939 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 [2022-07-12 19:28:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:10,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690818594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:10,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:28:10,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-07-12 19:28:10,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618749281] [2022-07-12 19:28:10,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:10,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:28:10,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:28:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:28:10,999 INFO L87 Difference]: Start difference. First operand 365 states and 433 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:28:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:11,127 INFO L93 Difference]: Finished difference Result 443 states and 508 transitions. [2022-07-12 19:28:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:28:11,128 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 [2022-07-12 19:28:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:11,129 INFO L225 Difference]: With dead ends: 443 [2022-07-12 19:28:11,129 INFO L226 Difference]: Without dead ends: 443 [2022-07-12 19:28:11,130 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 [2022-07-12 19:28:11,130 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 233 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:11,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 80 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:28:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-12 19:28:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 365. [2022-07-12 19:28:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 334 states have (on average 1.221556886227545) internal successors, (408), 348 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 430 transitions. [2022-07-12 19:28:11,137 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 430 transitions. Word has length 51 [2022-07-12 19:28:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:11,138 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 430 transitions. [2022-07-12 19:28:11,138 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) [2022-07-12 19:28:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 430 transitions. [2022-07-12 19:28:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 19:28:11,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:11,139 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:11,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:11,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:11,364 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-12 19:28:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:11,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060029012] [2022-07-12 19:28:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:11,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:11,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:11,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:11,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060029012] [2022-07-12 19:28:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060029012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457137206] [2022-07-12 19:28:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:11,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:11,440 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) [2022-07-12 19:28:11,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-12 19:28:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 19:28:11,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:11,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:28:11,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457137206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:11,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:11,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2022-07-12 19:28:11,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337903182] [2022-07-12 19:28:11,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:11,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 19:28:11,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:11,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 19:28:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-07-12 19:28:11,809 INFO L87 Difference]: Start difference. First operand 365 states and 430 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:28:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:12,126 INFO L93 Difference]: Finished difference Result 396 states and 455 transitions. [2022-07-12 19:28:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:28:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2022-07-12 19:28:12,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:12,127 INFO L225 Difference]: With dead ends: 396 [2022-07-12 19:28:12,127 INFO L226 Difference]: Without dead ends: 396 [2022-07-12 19:28:12,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-07-12 19:28:12,128 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 343 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:12,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 270 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-07-12 19:28:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 364. [2022-07-12 19:28:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2065868263473054) internal successors, (403), 347 states have internal predecessors, (403), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:12,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 425 transitions. [2022-07-12 19:28:12,135 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 425 transitions. Word has length 52 [2022-07-12 19:28:12,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:12,135 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 425 transitions. [2022-07-12 19:28:12,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-12 19:28:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 425 transitions. [2022-07-12 19:28:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 19:28:12,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:12,137 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] [2022-07-12 19:28:12,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-12 19:28:12,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:12,350 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:12,350 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-12 19:28:12,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:12,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202341633] [2022-07-12 19:28:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:12,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:12,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202341633] [2022-07-12 19:28:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202341633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332051978] [2022-07-12 19:28:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:12,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:12,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:12,852 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) [2022-07-12 19:28:12,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-12 19:28:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:12,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 19:28:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:13,109 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:28:13,109 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 [2022-07-12 19:28:13,323 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-07-12 19:28:13,323 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 [2022-07-12 19:28:13,365 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-07-12 19:28:13,365 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 [2022-07-12 19:28:13,495 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 [2022-07-12 19:28:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:13,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:13,592 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-12 19:28:13,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2022-07-12 19:28:13,868 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-12 19:28:13,869 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 [2022-07-12 19:28:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:14,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332051978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:14,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:14,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 44 [2022-07-12 19:28:14,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395370862] [2022-07-12 19:28:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 19:28:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 19:28:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2022-07-12 19:28:14,146 INFO L87 Difference]: Start difference. First operand 364 states and 425 transitions. Second operand has 46 states, 42 states have (on average 3.3333333333333335) internal successors, (140), 37 states have internal predecessors, (140), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-12 19:28:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:14,971 INFO L93 Difference]: Finished difference Result 451 states and 511 transitions. [2022-07-12 19:28:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 19:28:14,972 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 [2022-07-12 19:28:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:14,973 INFO L225 Difference]: With dead ends: 451 [2022-07-12 19:28:14,973 INFO L226 Difference]: Without dead ends: 451 [2022-07-12 19:28:14,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 19:28:14,976 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 660 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:14,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 253 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 726 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-07-12 19:28:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-12 19:28:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 364. [2022-07-12 19:28:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 334 states have (on average 1.2035928143712575) internal successors, (402), 347 states have internal predecessors, (402), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 19:28:14,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 424 transitions. [2022-07-12 19:28:14,995 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 424 transitions. Word has length 52 [2022-07-12 19:28:14,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:14,996 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 424 transitions. [2022-07-12 19:28:14,996 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) [2022-07-12 19:28:14,996 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 424 transitions. [2022-07-12 19:28:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 19:28:14,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:14,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:15,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:15,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:15,223 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:15,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:15,223 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2022-07-12 19:28:15,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:15,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861585563] [2022-07-12 19:28:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:15,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:15,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861585563] [2022-07-12 19:28:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861585563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138257395] [2022-07-12 19:28:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:15,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:15,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:15,274 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) [2022-07-12 19:28:15,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-12 19:28:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:15,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:28:15,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:28:15,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:15,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138257395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:15,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 19:28:15,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-12 19:28:15,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251500338] [2022-07-12 19:28:15,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:15,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:15,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:15,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:15,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:28:15,371 INFO L87 Difference]: Start difference. First operand 364 states and 424 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:15,374 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2022-07-12 19:28:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-07-12 19:28:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:15,376 INFO L225 Difference]: With dead ends: 306 [2022-07-12 19:28:15,376 INFO L226 Difference]: Without dead ends: 306 [2022-07-12 19:28:15,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:28:15,377 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:15,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 98 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:15,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-12 19:28:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2022-07-12 19:28:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.178030303030303) internal successors, (311), 274 states have internal predecessors, (311), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 19:28:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 329 transitions. [2022-07-12 19:28:15,382 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 329 transitions. Word has length 52 [2022-07-12 19:28:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:15,383 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 329 transitions. [2022-07-12 19:28:15,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 329 transitions. [2022-07-12 19:28:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 19:28:15,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:15,384 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] [2022-07-12 19:28:15,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-12 19:28:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-12 19:28:15,604 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-12 19:28:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277864397] [2022-07-12 19:28:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:16,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277864397] [2022-07-12 19:28:16,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277864397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:16,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644185338] [2022-07-12 19:28:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:16,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:16,158 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) [2022-07-12 19:28:16,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-12 19:28:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:16,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 19:28:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:16,485 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:28:16,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-12 19:28:16,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-12 19:28:16,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-12 19:28:16,615 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 [2022-07-12 19:28:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:16,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:16,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-12 19:28:16,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-12 19:28:16,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-07-12 19:28:16,984 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-12 19:28:16,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-07-12 19:28:17,086 INFO L356 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-07-12 19:28:17,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 49 [2022-07-12 19:28:17,134 INFO L356 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-07-12 19:28:17,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-07-12 19:28:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:17,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644185338] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:17,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 19:28:17,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 10] total 35 [2022-07-12 19:28:17,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476461269] [2022-07-12 19:28:17,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:17,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-12 19:28:17,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:17,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-12 19:28:17,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 19:28:17,201 INFO L87 Difference]: Start difference. First operand 289 states and 329 transitions. Second operand has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:28:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:18,089 INFO L93 Difference]: Finished difference Result 353 states and 392 transitions. [2022-07-12 19:28:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 19:28:18,089 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-07-12 19:28:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:18,091 INFO L225 Difference]: With dead ends: 353 [2022-07-12 19:28:18,091 INFO L226 Difference]: Without dead ends: 353 [2022-07-12 19:28:18,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 19:28:18,092 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 458 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:18,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 155 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 431 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-07-12 19:28:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-12 19:28:18,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 289. [2022-07-12 19:28:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 274 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 19:28:18,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 328 transitions. [2022-07-12 19:28:18,100 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 328 transitions. Word has length 53 [2022-07-12 19:28:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:18,101 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 328 transitions. [2022-07-12 19:28:18,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.235294117647059) internal successors, (144), 32 states have internal predecessors, (144), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 19:28:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 328 transitions. [2022-07-12 19:28:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 19:28:18,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:18,102 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] [2022-07-12 19:28:18,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-12 19:28:18,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-12 19:28:18,311 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-12 19:28:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958132565] [2022-07-12 19:28:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:18,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:18,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:18,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:28:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:18,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958132565] [2022-07-12 19:28:18,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958132565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:18,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048211119] [2022-07-12 19:28:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:18,548 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) [2022-07-12 19:28:18,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-12 19:28:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 19:28:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:18,723 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-12 19:28:18,724 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 [2022-07-12 19:28:18,865 INFO L356 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-07-12 19:28:18,865 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 [2022-07-12 19:28:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:18,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:19,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048211119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:19,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:19,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-07-12 19:28:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002829296] [2022-07-12 19:28:19,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:19,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 19:28:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 19:28:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-07-12 19:28:19,178 INFO L87 Difference]: Start difference. First operand 289 states and 328 transitions. Second operand has 21 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 2 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:28:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:19,758 INFO L93 Difference]: Finished difference Result 307 states and 344 transitions. [2022-07-12 19:28:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:28:19,759 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 [2022-07-12 19:28:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:19,760 INFO L225 Difference]: With dead ends: 307 [2022-07-12 19:28:19,760 INFO L226 Difference]: Without dead ends: 307 [2022-07-12 19:28:19,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 19:28:19,761 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 336 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:19,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 264 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 295 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-07-12 19:28:19,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-12 19:28:19,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 288. [2022-07-12 19:28:19,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 273 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 19:28:19,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 327 transitions. [2022-07-12 19:28:19,765 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 327 transitions. Word has length 54 [2022-07-12 19:28:19,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:19,765 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 327 transitions. [2022-07-12 19:28:19,766 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) [2022-07-12 19:28:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 327 transitions. [2022-07-12 19:28:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-12 19:28:19,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:19,766 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] [2022-07-12 19:28:19,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-12 19:28:19,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-12 19:28:19,979 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2022-07-12 19:28:19,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679039243] [2022-07-12 19:28:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:19,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:20,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:20,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 19:28:20,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 19:28:20,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679039243] [2022-07-12 19:28:20,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679039243] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:20,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024344101] [2022-07-12 19:28:20,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 19:28:20,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:20,160 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) [2022-07-12 19:28:20,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-12 19:28:20,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 19:28:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:28:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-12 19:28:20,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:20,546 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 [2022-07-12 19:28:20,649 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:28:20,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024344101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:20,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:20,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2022-07-12 19:28:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855093792] [2022-07-12 19:28:20,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:20,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 19:28:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 19:28:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 19:28:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-12 19:28:20,816 INFO L87 Difference]: Start difference. First operand 288 states and 327 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 14 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 19:28:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:21,402 INFO L93 Difference]: Finished difference Result 312 states and 347 transitions. [2022-07-12 19:28:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 19:28:21,403 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 [2022-07-12 19:28:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:21,404 INFO L225 Difference]: With dead ends: 312 [2022-07-12 19:28:21,404 INFO L226 Difference]: Without dead ends: 312 [2022-07-12 19:28:21,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 19:28:21,405 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:21,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 261 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 359 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-12 19:28:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-07-12 19:28:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 288. [2022-07-12 19:28:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 264 states have (on average 1.1590909090909092) internal successors, (306), 273 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 19:28:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-07-12 19:28:21,409 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 56 [2022-07-12 19:28:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:21,410 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-07-12 19:28:21,410 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) [2022-07-12 19:28:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-07-12 19:28:21,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-12 19:28:21,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:21,411 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] [2022-07-12 19:28:21,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-12 19:28:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 19:28:21,615 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2022-07-12 19:28:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 19:28:21,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769737401] [2022-07-12 19:28:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 19:28:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 19:28:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-12 19:28:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:21,867 ERROR L253 erpolLogProxyWrapper]: Interpolant 12 not inductive [2022-07-12 19:28:21,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-12 19:28:21,875 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:879) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:803) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:192) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:284) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:379) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-12 19:28:21,878 INFO L158 Benchmark]: Toolchain (without parser) took 43319.91ms. Allocated memory was 104.9MB in the beginning and 205.5MB in the end (delta: 100.7MB). Free memory was 75.2MB in the beginning and 135.6MB in the end (delta: -60.4MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2022-07-12 19:28:21,878 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:28:21,879 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.34ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 71.9MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 19:28:21,879 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.68ms. Allocated memory is still 104.9MB. Free memory was 71.9MB in the beginning and 69.5MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-12 19:28:21,879 INFO L158 Benchmark]: Boogie Preprocessor took 58.10ms. Allocated memory is still 104.9MB. Free memory was 69.5MB in the beginning and 68.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 19:28:21,879 INFO L158 Benchmark]: RCFGBuilder took 572.75ms. Allocated memory is still 104.9MB. Free memory was 68.0MB in the beginning and 54.4MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 19:28:21,879 INFO L158 Benchmark]: TraceAbstraction took 42186.07ms. Allocated memory was 104.9MB in the beginning and 205.5MB in the end (delta: 100.7MB). Free memory was 54.1MB in the beginning and 135.6MB in the end (delta: -81.5MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2022-07-12 19:28:21,880 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 104.9MB. Free memory was 62.0MB in the beginning and 62.0MB in the end (delta: 46.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.34ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 71.9MB in the end (delta: 3.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.68ms. Allocated memory is still 104.9MB. Free memory was 71.9MB in the beginning and 69.5MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.10ms. Allocated memory is still 104.9MB. Free memory was 69.5MB in the beginning and 68.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 572.75ms. Allocated memory is still 104.9MB. Free memory was 68.0MB in the beginning and 54.4MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 42186.07ms. Allocated memory was 104.9MB in the beginning and 205.5MB in the end (delta: 100.7MB). Free memory was 54.1MB in the beginning and 135.6MB in the end (delta: -81.5MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:233) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-12 19:28:21,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 19:28:24,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 19:28:24,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 19:28:24,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 19:28:24,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 19:28:24,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 19:28:24,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 19:28:24,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 19:28:24,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 19:28:24,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 19:28:24,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 19:28:24,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 19:28:24,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 19:28:24,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 19:28:24,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 19:28:24,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 19:28:24,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 19:28:24,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 19:28:24,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 19:28:24,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 19:28:24,109 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 19:28:24,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 19:28:24,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 19:28:24,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 19:28:24,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 19:28:24,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 19:28:24,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 19:28:24,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 19:28:24,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 19:28:24,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 19:28:24,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 19:28:24,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 19:28:24,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 19:28:24,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 19:28:24,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 19:28:24,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 19:28:24,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 19:28:24,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 19:28:24,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 19:28:24,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 19:28:24,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 19:28:24,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 19:28:24,144 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-12 19:28:24,178 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 19:28:24,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 19:28:24,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 19:28:24,179 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 19:28:24,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 19:28:24,180 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 19:28:24,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 19:28:24,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 19:28:24,181 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 19:28:24,182 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 19:28:24,182 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 19:28:24,182 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 19:28:24,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 19:28:24,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 19:28:24,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 19:28:24,192 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 19:28:24,192 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 19:28:24,193 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 19:28:24,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 19:28:24,193 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 19:28:24,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-12 19:28:24,193 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-12 19:28:24,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 19:28:24,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 19:28:24,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 19:28:24,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 19:28:24,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 19:28:24,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:28:24,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 19:28:24,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 19:28:24,196 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-12 19:28:24,196 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-12 19:28:24,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-12 19:28:24,196 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-07-12 19:28:24,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 19:28:24,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 19:28:24,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 19:28:24,600 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 19:28:24,600 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 19:28:24,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-12 19:28:24,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30622e756/1b87bbc06d2f4b35ba1ce2e0370772df/FLAGd11fb418a [2022-07-12 19:28:25,223 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 19:28:25,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-07-12 19:28:25,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30622e756/1b87bbc06d2f4b35ba1ce2e0370772df/FLAGd11fb418a [2022-07-12 19:28:25,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30622e756/1b87bbc06d2f4b35ba1ce2e0370772df [2022-07-12 19:28:25,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 19:28:25,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 19:28:25,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 19:28:25,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 19:28:25,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 19:28:25,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:25,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@315aee36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25, skipping insertion in model container [2022-07-12 19:28:25,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:25,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 19:28:25,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 19:28:25,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:28:25,898 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 19:28:25,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 19:28:25,964 INFO L208 MainTranslator]: Completed translation [2022-07-12 19:28:25,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25 WrapperNode [2022-07-12 19:28:25,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 19:28:25,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 19:28:25,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 19:28:25,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 19:28:25,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:25,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,009 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-07-12 19:28:26,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 19:28:26,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 19:28:26,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 19:28:26,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 19:28:26,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 19:28:26,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 19:28:26,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 19:28:26,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 19:28:26,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (1/1) ... [2022-07-12 19:28:26,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 19:28:26,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 19:28:26,081 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) [2022-07-12 19:28:26,091 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 [2022-07-12 19:28:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-07-12 19:28:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-07-12 19:28:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-07-12 19:28:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 19:28:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 19:28:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 19:28:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 19:28:26,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 19:28:26,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-12 19:28:26,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 19:28:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 19:28:26,206 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 19:28:26,208 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 19:28:26,531 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 19:28:26,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 19:28:26,540 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 19:28:26,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:28:26 BoogieIcfgContainer [2022-07-12 19:28:26,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 19:28:26,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 19:28:26,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 19:28:26,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 19:28:26,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 07:28:25" (1/3) ... [2022-07-12 19:28:26,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66016e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:28:26, skipping insertion in model container [2022-07-12 19:28:26,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 07:28:25" (2/3) ... [2022-07-12 19:28:26,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66016e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 07:28:26, skipping insertion in model container [2022-07-12 19:28:26,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 07:28:26" (3/3) ... [2022-07-12 19:28:26,554 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-07-12 19:28:26,569 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 19:28:26,570 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-07-12 19:28:26,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 19:28:26,637 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@60146814, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77a0eedd [2022-07-12 19:28:26,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-07-12 19:28:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-12 19:28:26,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:28:26,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:26,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:28:26,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-07-12 19:28:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:26,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662631000] [2022-07-12 19:28:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:26,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:26,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:26,677 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) [2022-07-12 19:28:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-12 19:28:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:28:26,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:26,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:26,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:26,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662631000] [2022-07-12 19:28:26,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662631000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:26,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:26,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-07-12 19:28:26,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513231687] [2022-07-12 19:28:26,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:26,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:26,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:28:26,954 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:27,213 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-07-12 19:28:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:27,218 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 [2022-07-12 19:28:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:27,229 INFO L225 Difference]: With dead ends: 110 [2022-07-12 19:28:27,229 INFO L226 Difference]: Without dead ends: 106 [2022-07-12 19:28:27,231 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 [2022-07-12 19:28:27,234 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:27,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-12 19:28:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-07-12 19:28:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-07-12 19:28:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-07-12 19:28:27,299 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-07-12 19:28:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:27,299 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-07-12 19:28:27,299 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) [2022-07-12 19:28:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-07-12 19:28:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 19:28:27,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:27,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 19:28:27,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-12 19:28:27,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:27,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:27,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:27,516 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-07-12 19:28:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303292385] [2022-07-12 19:28:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:27,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:27,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:27,520 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) [2022-07-12 19:28:27,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-12 19:28:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:28:27,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:27,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:27,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:27,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303292385] [2022-07-12 19:28:27,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303292385] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:27,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:27,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:28:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983889219] [2022-07-12 19:28:27,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:28:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:28:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:28:27,703 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:27,960 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-07-12 19:28:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:28:27,961 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 [2022-07-12 19:28:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:27,963 INFO L225 Difference]: With dead ends: 206 [2022-07-12 19:28:27,968 INFO L226 Difference]: Without dead ends: 206 [2022-07-12 19:28:27,968 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 [2022-07-12 19:28:27,969 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:27,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-12 19:28:27,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-07-12 19:28:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 19:28:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-07-12 19:28:27,992 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-07-12 19:28:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:27,992 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-07-12 19:28:27,992 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) [2022-07-12 19:28:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-07-12 19:28:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-12 19:28:27,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:27,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:28,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:28,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:28,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:28,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-07-12 19:28:28,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:28,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189162871] [2022-07-12 19:28:28,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:28,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:28,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:28,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:28:28,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-12 19:28:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:28,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:28:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:28,376 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 [2022-07-12 19:28:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:28,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:28,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:28,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189162871] [2022-07-12 19:28:28,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189162871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:28,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:28,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:28:28,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442686956] [2022-07-12 19:28:28,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:28,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:28:28,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:28,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:28:28,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:28,391 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:28,664 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-07-12 19:28:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:28:28,665 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 [2022-07-12 19:28:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:28,667 INFO L225 Difference]: With dead ends: 228 [2022-07-12 19:28:28,667 INFO L226 Difference]: Without dead ends: 228 [2022-07-12 19:28:28,668 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 [2022-07-12 19:28:28,669 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:28,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-12 19:28:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-07-12 19:28:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 19:28:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-07-12 19:28:28,687 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-07-12 19:28:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:28,687 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-07-12 19:28:28,687 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) [2022-07-12 19:28:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-07-12 19:28:28,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-12 19:28:28,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:28,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:28,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:28,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:28,898 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:28,898 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-07-12 19:28:28,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:28,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377242699] [2022-07-12 19:28:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:28,899 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:28,900 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) [2022-07-12 19:28:28,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-12 19:28:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:28:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:29,102 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 [2022-07-12 19:28:29,111 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 [2022-07-12 19:28:29,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:29,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:29,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:29,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377242699] [2022-07-12 19:28:29,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377242699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:29,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:29,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:28:29,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16347155] [2022-07-12 19:28:29,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:29,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:28:29,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:29,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:28:29,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:29,142 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:29,379 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-07-12 19:28:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:28:29,380 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 [2022-07-12 19:28:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:29,381 INFO L225 Difference]: With dead ends: 208 [2022-07-12 19:28:29,382 INFO L226 Difference]: Without dead ends: 208 [2022-07-12 19:28:29,382 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 [2022-07-12 19:28:29,383 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:29,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-12 19:28:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-07-12 19:28:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 19:28:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-07-12 19:28:29,396 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-07-12 19:28:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:29,396 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-07-12 19:28:29,396 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) [2022-07-12 19:28:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-07-12 19:28:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 19:28:29,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:29,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:29,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:29,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-07-12 19:28:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:29,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32120400] [2022-07-12 19:28:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:29,617 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) [2022-07-12 19:28:29,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-12 19:28:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:29,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 19:28:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:29,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:29,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32120400] [2022-07-12 19:28:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32120400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:28:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047626736] [2022-07-12 19:28:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:29,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:28:29,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:28:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:29,750 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:29,917 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-07-12 19:28:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:28:29,917 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 [2022-07-12 19:28:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:29,919 INFO L225 Difference]: With dead ends: 234 [2022-07-12 19:28:29,919 INFO L226 Difference]: Without dead ends: 234 [2022-07-12 19:28:29,919 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 [2022-07-12 19:28:29,920 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:29,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:28:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-12 19:28:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-07-12 19:28:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 19:28:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-07-12 19:28:29,941 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-07-12 19:28:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:29,941 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-07-12 19:28:29,941 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) [2022-07-12 19:28:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-07-12 19:28:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 19:28:29,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:29,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:29,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:30,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:30,152 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:30,152 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-07-12 19:28:30,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:30,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724399165] [2022-07-12 19:28:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:30,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:30,155 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) [2022-07-12 19:28:30,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-12 19:28:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:28:30,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:30,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:30,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724399165] [2022-07-12 19:28:30,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724399165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:30,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:30,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:28:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904423840] [2022-07-12 19:28:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 19:28:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 19:28:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 19:28:30,269 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:30,473 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-07-12 19:28:30,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:28:30,474 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 [2022-07-12 19:28:30,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:30,476 INFO L225 Difference]: With dead ends: 231 [2022-07-12 19:28:30,476 INFO L226 Difference]: Without dead ends: 231 [2022-07-12 19:28:30,476 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 [2022-07-12 19:28:30,477 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:30,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:28:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-12 19:28:30,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-07-12 19:28:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-07-12 19:28:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-07-12 19:28:30,488 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-07-12 19:28:30,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:30,488 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-07-12 19:28:30,488 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) [2022-07-12 19:28:30,488 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-07-12 19:28:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 19:28:30,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:30,489 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:30,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:30,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:30,699 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-07-12 19:28:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [192549754] [2022-07-12 19:28:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:30,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:30,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:30,702 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) [2022-07-12 19:28:30,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-12 19:28:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:30,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:28:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:30,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:31,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [192549754] [2022-07-12 19:28:31,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [192549754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:31,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:31,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-12 19:28:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288848339] [2022-07-12 19:28:31,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:28:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:28:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:28:31,412 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:31,966 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-07-12 19:28:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 19:28:31,968 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 [2022-07-12 19:28:31,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:31,970 INFO L225 Difference]: With dead ends: 367 [2022-07-12 19:28:31,970 INFO L226 Difference]: Without dead ends: 367 [2022-07-12 19:28:31,970 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 [2022-07-12 19:28:31,971 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:31,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 19:28:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-12 19:28:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-07-12 19:28:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-12 19:28:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-07-12 19:28:31,987 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-07-12 19:28:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:31,987 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-07-12 19:28:31,988 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) [2022-07-12 19:28:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-07-12 19:28:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 19:28:31,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:31,989 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:31,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:32,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:32,198 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:32,198 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-07-12 19:28:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:32,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498658271] [2022-07-12 19:28:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:32,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:32,201 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) [2022-07-12 19:28:32,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-12 19:28:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 19:28:32,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:32,434 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 [2022-07-12 19:28:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:32,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:32,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498658271] [2022-07-12 19:28:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498658271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:32,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:32,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:28:32,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84385021] [2022-07-12 19:28:32,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:32,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:28:32,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:28:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:28:32,587 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:33,005 INFO L93 Difference]: Finished difference Result 405 states and 567 transitions. [2022-07-12 19:28:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 19:28:33,007 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 [2022-07-12 19:28:33,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:33,009 INFO L225 Difference]: With dead ends: 405 [2022-07-12 19:28:33,009 INFO L226 Difference]: Without dead ends: 405 [2022-07-12 19:28:33,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-12 19:28:33,009 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 267 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:33,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 323 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:28:33,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-12 19:28:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 249. [2022-07-12 19:28:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 210 states have (on average 1.6142857142857143) internal successors, (339), 234 states have internal predecessors, (339), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-07-12 19:28:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 378 transitions. [2022-07-12 19:28:33,021 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 378 transitions. Word has length 15 [2022-07-12 19:28:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:33,022 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 378 transitions. [2022-07-12 19:28:33,022 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) [2022-07-12 19:28:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 378 transitions. [2022-07-12 19:28:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 19:28:33,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:33,023 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:33,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-07-12 19:28:33,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:33,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-07-12 19:28:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:33,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626653325] [2022-07-12 19:28:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:33,236 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) [2022-07-12 19:28:33,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-12 19:28:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-12 19:28:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:33,544 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 [2022-07-12 19:28:33,548 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 [2022-07-12 19:28:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:33,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:33,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626653325] [2022-07-12 19:28:33,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626653325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:33,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:33,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:28:33,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908439762] [2022-07-12 19:28:33,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:33,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:28:33,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:33,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:28:33,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:28:33,745 INFO L87 Difference]: Start difference. First operand 249 states and 378 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:34,822 INFO L93 Difference]: Finished difference Result 626 states and 845 transitions. [2022-07-12 19:28:34,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:28:34,823 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 [2022-07-12 19:28:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:34,826 INFO L225 Difference]: With dead ends: 626 [2022-07-12 19:28:34,826 INFO L226 Difference]: Without dead ends: 626 [2022-07-12 19:28:34,827 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 [2022-07-12 19:28:34,827 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 460 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:34,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 606 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 19:28:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-07-12 19:28:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 349. [2022-07-12 19:28:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 303 states have (on average 1.6336633663366336) internal successors, (495), 330 states have internal predecessors, (495), 11 states have call successors, (11), 7 states have call predecessors, (11), 15 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-07-12 19:28:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 548 transitions. [2022-07-12 19:28:34,851 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 548 transitions. Word has length 16 [2022-07-12 19:28:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:34,852 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 548 transitions. [2022-07-12 19:28:34,852 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) [2022-07-12 19:28:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 548 transitions. [2022-07-12 19:28:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 19:28:34,853 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:34,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:34,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-12 19:28:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:35,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-07-12 19:28:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373774847] [2022-07-12 19:28:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:35,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:35,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:35,066 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) [2022-07-12 19:28:35,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-12 19:28:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:28:35,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:35,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:35,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:35,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373774847] [2022-07-12 19:28:35,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373774847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:35,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:35,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 19:28:35,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385641646] [2022-07-12 19:28:35,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:35,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:35,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:35,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:35,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:28:35,204 INFO L87 Difference]: Start difference. First operand 349 states and 548 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:35,229 INFO L93 Difference]: Finished difference Result 378 states and 554 transitions. [2022-07-12 19:28:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:35,230 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 [2022-07-12 19:28:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:35,232 INFO L225 Difference]: With dead ends: 378 [2022-07-12 19:28:35,232 INFO L226 Difference]: Without dead ends: 378 [2022-07-12 19:28:35,233 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 [2022-07-12 19:28:35,233 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:35,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-12 19:28:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2022-07-12 19:28:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 318 states have (on average 1.5628930817610063) internal successors, (497), 347 states have internal predecessors, (497), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (43), 11 states have call predecessors, (43), 11 states have call successors, (43) [2022-07-12 19:28:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 551 transitions. [2022-07-12 19:28:35,245 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 551 transitions. Word has length 18 [2022-07-12 19:28:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:35,245 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 551 transitions. [2022-07-12 19:28:35,246 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) [2022-07-12 19:28:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 551 transitions. [2022-07-12 19:28:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 19:28:35,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:35,247 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-12 19:28:35,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:35,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:35,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:35,456 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-07-12 19:28:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:35,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668527538] [2022-07-12 19:28:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 19:28:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:35,458 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) [2022-07-12 19:28:35,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-12 19:28:35,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 19:28:35,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 19:28:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:28:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:35,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:36,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:36,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668527538] [2022-07-12 19:28:36,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668527538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:36,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:36,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-07-12 19:28:36,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462447412] [2022-07-12 19:28:36,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:36,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:28:36,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:36,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:28:36,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:28:36,649 INFO L87 Difference]: Start difference. First operand 367 states and 551 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 19:28:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:39,176 INFO L93 Difference]: Finished difference Result 620 states and 878 transitions. [2022-07-12 19:28:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:28:39,178 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 [2022-07-12 19:28:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:39,180 INFO L225 Difference]: With dead ends: 620 [2022-07-12 19:28:39,181 INFO L226 Difference]: Without dead ends: 620 [2022-07-12 19:28:39,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-12 19:28:39,181 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 458 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:39,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 360 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-12 19:28:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2022-07-12 19:28:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 402. [2022-07-12 19:28:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 354 states have (on average 1.612994350282486) internal successors, (571), 382 states have internal predecessors, (571), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-07-12 19:28:39,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 618 transitions. [2022-07-12 19:28:39,198 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 618 transitions. Word has length 22 [2022-07-12 19:28:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:39,200 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 618 transitions. [2022-07-12 19:28:39,200 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) [2022-07-12 19:28:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 618 transitions. [2022-07-12 19:28:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 19:28:39,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:39,205 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] [2022-07-12 19:28:39,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:39,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:39,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-07-12 19:28:39,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:39,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066332858] [2022-07-12 19:28:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:39,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:39,416 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) [2022-07-12 19:28:39,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-12 19:28:39,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 19:28:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:39,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:28:39,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066332858] [2022-07-12 19:28:39,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066332858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:28:39,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:28:39,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:28:39,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124857344] [2022-07-12 19:28:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:28:39,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:28:39,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:28:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:28:39,490 INFO L87 Difference]: Start difference. First operand 402 states and 618 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:39,499 INFO L93 Difference]: Finished difference Result 303 states and 456 transitions. [2022-07-12 19:28:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:28:39,500 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 [2022-07-12 19:28:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:39,502 INFO L225 Difference]: With dead ends: 303 [2022-07-12 19:28:39,502 INFO L226 Difference]: Without dead ends: 303 [2022-07-12 19:28:39,503 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 [2022-07-12 19:28:39,503 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:39,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:28:39,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-12 19:28:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-07-12 19:28:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 263 states have (on average 1.6121673003802282) internal successors, (424), 288 states have internal predecessors, (424), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-07-12 19:28:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 456 transitions. [2022-07-12 19:28:39,517 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 456 transitions. Word has length 25 [2022-07-12 19:28:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:39,517 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 456 transitions. [2022-07-12 19:28:39,517 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) [2022-07-12 19:28:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 456 transitions. [2022-07-12 19:28:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 19:28:39,520 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:39,521 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] [2022-07-12 19:28:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:39,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:39,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:39,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-07-12 19:28:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327567504] [2022-07-12 19:28:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:39,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:39,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:39,732 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) [2022-07-12 19:28:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-12 19:28:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:39,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 19:28:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:42,142 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 [2022-07-12 19:28:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:44,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:44,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327567504] [2022-07-12 19:28:44,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327567504] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:44,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908770440] [2022-07-12 19:28:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:44,679 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:28:44,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:28:44,681 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:28:44,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-12 19:28:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 19:28:44,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:47,143 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 [2022-07-12 19:28:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:47,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908770440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:28:49,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:49,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-07-12 19:28:49,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080544588] [2022-07-12 19:28:49,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:49,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:28:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:28:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2022-07-12 19:28:49,457 INFO L87 Difference]: Start difference. First operand 303 states and 456 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:28:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:53,979 INFO L93 Difference]: Finished difference Result 526 states and 738 transitions. [2022-07-12 19:28:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 19:28:53,980 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 [2022-07-12 19:28:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:53,982 INFO L225 Difference]: With dead ends: 526 [2022-07-12 19:28:53,982 INFO L226 Difference]: Without dead ends: 526 [2022-07-12 19:28:53,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=74, Invalid=163, Unknown=3, NotChecked=0, Total=240 [2022-07-12 19:28:53,983 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 297 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:53,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 203 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 121 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-07-12 19:28:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-12 19:28:53,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 426. [2022-07-12 19:28:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 379 states have (on average 1.6094986807387863) internal successors, (610), 407 states have internal predecessors, (610), 10 states have call successors, (10), 8 states have call predecessors, (10), 17 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-12 19:28:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 654 transitions. [2022-07-12 19:28:53,994 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 654 transitions. Word has length 27 [2022-07-12 19:28:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:53,995 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 654 transitions. [2022-07-12 19:28:53,995 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) [2022-07-12 19:28:53,995 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 654 transitions. [2022-07-12 19:28:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 19:28:53,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:53,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:54,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:54,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:54,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-07-12 19:28:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410166306] [2022-07-12 19:28:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:54,400 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:54,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:54,401 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) [2022-07-12 19:28:54,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-12 19:28:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 19:28:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:54,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410166306] [2022-07-12 19:28:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410166306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:54,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:54,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-12 19:28:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371669379] [2022-07-12 19:28:54,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:28:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:28:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:28:54,705 INFO L87 Difference]: Start difference. First operand 426 states and 654 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:28:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:55,188 INFO L93 Difference]: Finished difference Result 593 states and 828 transitions. [2022-07-12 19:28:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:28:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-07-12 19:28:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:55,191 INFO L225 Difference]: With dead ends: 593 [2022-07-12 19:28:55,191 INFO L226 Difference]: Without dead ends: 593 [2022-07-12 19:28:55,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-12 19:28:55,192 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 305 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:55,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 277 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:28:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-12 19:28:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 518. [2022-07-12 19:28:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 468 states have (on average 1.5320512820512822) internal successors, (717), 497 states have internal predecessors, (717), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (34), 10 states have call predecessors, (34), 10 states have call successors, (34) [2022-07-12 19:28:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 761 transitions. [2022-07-12 19:28:55,206 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 761 transitions. Word has length 28 [2022-07-12 19:28:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:55,206 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 761 transitions. [2022-07-12 19:28:55,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:28:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 761 transitions. [2022-07-12 19:28:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:28:55,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:55,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:28:55,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-12 19:28:55,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:55,417 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:55,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-07-12 19:28:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912618028] [2022-07-12 19:28:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:55,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:55,419 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:28:55,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-12 19:28:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:28:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:55,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:28:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:55,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:28:55,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912618028] [2022-07-12 19:28:55,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912618028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:28:55,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:28:55,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:28:55,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480950773] [2022-07-12 19:28:55,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:28:55,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:28:55,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:28:55,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:28:55,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:28:55,796 INFO L87 Difference]: Start difference. First operand 518 states and 761 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:28:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:28:56,385 INFO L93 Difference]: Finished difference Result 571 states and 788 transitions. [2022-07-12 19:28:56,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:28:56,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-07-12 19:28:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:28:56,388 INFO L225 Difference]: With dead ends: 571 [2022-07-12 19:28:56,388 INFO L226 Difference]: Without dead ends: 571 [2022-07-12 19:28:56,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-12 19:28:56,389 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 348 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:28:56,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 316 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:28:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-12 19:28:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 522. [2022-07-12 19:28:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 471 states have (on average 1.494692144373673) internal successors, (704), 501 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 21 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-12 19:28:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 746 transitions. [2022-07-12 19:28:56,402 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 746 transitions. Word has length 29 [2022-07-12 19:28:56,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:28:56,403 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 746 transitions. [2022-07-12 19:28:56,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:28:56,403 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 746 transitions. [2022-07-12 19:28:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 19:28:56,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:28:56,404 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] [2022-07-12 19:28:56,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-12 19:28:56,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:28:56,613 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:28:56,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:28:56,613 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-07-12 19:28:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:28:56,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217991209] [2022-07-12 19:28:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:28:56,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:28:56,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:28:56,615 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) [2022-07-12 19:28:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-12 19:28:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:28:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:28:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:28:59,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:28:59,230 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 [2022-07-12 19:28:59,327 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 [2022-07-12 19:28:59,331 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 [2022-07-12 19:28:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:28:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:01,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217991209] [2022-07-12 19:29:01,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217991209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:01,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1091032122] [2022-07-12 19:29:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:01,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:29:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:29:01,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:29:01,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-12 19:29:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:29:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:06,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:29:06,406 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 [2022-07-12 19:29:06,485 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 [2022-07-12 19:29:06,491 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 [2022-07-12 19:29:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:08,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1091032122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:08,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:08,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-12 19:29:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354277449] [2022-07-12 19:29:08,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:29:08,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:08,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:29:08,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-12 19:29:08,752 INFO L87 Difference]: Start difference. First operand 522 states and 746 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:15,734 INFO L93 Difference]: Finished difference Result 705 states and 930 transitions. [2022-07-12 19:29:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:29:15,735 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 [2022-07-12 19:29:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:15,737 INFO L225 Difference]: With dead ends: 705 [2022-07-12 19:29:15,738 INFO L226 Difference]: Without dead ends: 705 [2022-07-12 19:29:15,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-12 19:29:15,738 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 255 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:15,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 293 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 218 Invalid, 0 Unknown, 74 Unchecked, 0.6s Time] [2022-07-12 19:29:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-07-12 19:29:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 527. [2022-07-12 19:29:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 479 states have (on average 1.5052192066805845) internal successors, (721), 506 states have internal predecessors, (721), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:29:15,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 757 transitions. [2022-07-12 19:29:15,751 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 757 transitions. Word has length 29 [2022-07-12 19:29:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:15,752 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 757 transitions. [2022-07-12 19:29:15,752 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) [2022-07-12 19:29:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 757 transitions. [2022-07-12 19:29:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-12 19:29:15,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:15,753 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] [2022-07-12 19:29:15,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:15,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:16,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:16,156 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:16,157 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2022-07-12 19:29:16,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:16,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745082690] [2022-07-12 19:29:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:16,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:16,167 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:29:16,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-12 19:29:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:29:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:29:18,663 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 [2022-07-12 19:29:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:18,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:25,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:25,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745082690] [2022-07-12 19:29:25,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745082690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:25,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1127730632] [2022-07-12 19:29:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:25,822 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:29:25,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:29:25,823 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:29:25,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-07-12 19:29:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 19:29:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:29:28,428 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 [2022-07-12 19:29:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:28,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1127730632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:29,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:29,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-12 19:29:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662800735] [2022-07-12 19:29:29,197 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:29:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:29:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=98, Unknown=2, NotChecked=0, Total=132 [2022-07-12 19:29:29,198 INFO L87 Difference]: Start difference. First operand 527 states and 757 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:33,992 INFO L93 Difference]: Finished difference Result 836 states and 1086 transitions. [2022-07-12 19:29:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 19:29:33,993 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 [2022-07-12 19:29:33,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:33,996 INFO L225 Difference]: With dead ends: 836 [2022-07-12 19:29:33,996 INFO L226 Difference]: Without dead ends: 836 [2022-07-12 19:29:33,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-07-12 19:29:33,997 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 422 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:33,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 315 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 198 Invalid, 0 Unknown, 79 Unchecked, 0.5s Time] [2022-07-12 19:29:33,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-07-12 19:29:34,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 529. [2022-07-12 19:29:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 481 states have (on average 1.4636174636174637) internal successors, (704), 508 states have internal predecessors, (704), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-07-12 19:29:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 740 transitions. [2022-07-12 19:29:34,009 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 740 transitions. Word has length 35 [2022-07-12 19:29:34,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:34,010 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 740 transitions. [2022-07-12 19:29:34,010 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) [2022-07-12 19:29:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 740 transitions. [2022-07-12 19:29:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-12 19:29:34,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:34,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:29:34,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:34,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:34,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:29:34,420 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1271207958, now seen corresponding path program 1 times [2022-07-12 19:29:34,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:34,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66827510] [2022-07-12 19:29:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:34,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:34,422 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) [2022-07-12 19:29:34,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-12 19:29:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 19:29:34,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:34,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-12 19:29:34,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-12 19:29:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:36,180 INFO L356 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2022-07-12 19:29:36,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2022-07-12 19:29:36,201 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-07-12 19:29:36,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 12 [2022-07-12 19:29:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:36,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66827510] [2022-07-12 19:29:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66827510] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:29:36,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:36,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-07-12 19:29:36,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243689978] [2022-07-12 19:29:36,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:36,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 19:29:36,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 19:29:36,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-12 19:29:36,252 INFO L87 Difference]: Start difference. First operand 529 states and 740 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:36,958 INFO L93 Difference]: Finished difference Result 576 states and 756 transitions. [2022-07-12 19:29:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 19:29:36,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-07-12 19:29:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:36,961 INFO L225 Difference]: With dead ends: 576 [2022-07-12 19:29:36,961 INFO L226 Difference]: Without dead ends: 576 [2022-07-12 19:29:36,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-12 19:29:36,962 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 231 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:36,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 410 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 19:29:36,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-12 19:29:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 486. [2022-07-12 19:29:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 441 states have (on average 1.4285714285714286) internal successors, (630), 467 states have internal predecessors, (630), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-12 19:29:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 662 transitions. [2022-07-12 19:29:36,977 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 662 transitions. Word has length 39 [2022-07-12 19:29:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:36,978 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 662 transitions. [2022-07-12 19:29:36,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 662 transitions. [2022-07-12 19:29:36,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 19:29:36,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:36,979 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] [2022-07-12 19:29:36,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:37,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:37,190 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-07-12 19:29:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:37,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874276182] [2022-07-12 19:29:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:37,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:37,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:37,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:29:37,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-12 19:29:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:37,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-12 19:29:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:37,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:37,509 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874276182] [2022-07-12 19:29:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874276182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:29:37,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:37,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 19:29:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973010621] [2022-07-12 19:29:37,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:37,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:29:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:29:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:29:37,510 INFO L87 Difference]: Start difference. First operand 486 states and 662 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:37,547 INFO L93 Difference]: Finished difference Result 496 states and 668 transitions. [2022-07-12 19:29:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 19:29:37,552 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 [2022-07-12 19:29:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:37,553 INFO L225 Difference]: With dead ends: 496 [2022-07-12 19:29:37,553 INFO L226 Difference]: Without dead ends: 496 [2022-07-12 19:29:37,554 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 [2022-07-12 19:29:37,554 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:37,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:29:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-07-12 19:29:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 484. [2022-07-12 19:29:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 441 states have (on average 1.4149659863945578) internal successors, (624), 465 states have internal predecessors, (624), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-07-12 19:29:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 656 transitions. [2022-07-12 19:29:37,564 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 656 transitions. Word has length 40 [2022-07-12 19:29:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:37,564 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 656 transitions. [2022-07-12 19:29:37,564 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) [2022-07-12 19:29:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 656 transitions. [2022-07-12 19:29:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 19:29:37,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:37,565 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] [2022-07-12 19:29:37,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:37,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:37,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-07-12 19:29:37,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:37,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741187498] [2022-07-12 19:29:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:37,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:37,776 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) [2022-07-12 19:29:37,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-12 19:29:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:37,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 19:29:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:38,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:38,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:38,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741187498] [2022-07-12 19:29:38,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741187498] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:29:38,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:38,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-07-12 19:29:38,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117868259] [2022-07-12 19:29:38,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 19:29:38,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:38,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 19:29:38,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 19:29:38,282 INFO L87 Difference]: Start difference. First operand 484 states and 656 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:29:38,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:38,433 INFO L93 Difference]: Finished difference Result 432 states and 566 transitions. [2022-07-12 19:29:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 19:29:38,434 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 [2022-07-12 19:29:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:38,435 INFO L225 Difference]: With dead ends: 432 [2022-07-12 19:29:38,435 INFO L226 Difference]: Without dead ends: 432 [2022-07-12 19:29:38,436 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 [2022-07-12 19:29:38,436 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 137 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:38,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 162 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:29:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-12 19:29:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 402. [2022-07-12 19:29:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 366 states have (on average 1.407103825136612) internal successors, (515), 385 states have internal predecessors, (515), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:29:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 539 transitions. [2022-07-12 19:29:38,444 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 539 transitions. Word has length 41 [2022-07-12 19:29:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:38,445 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 539 transitions. [2022-07-12 19:29:38,445 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) [2022-07-12 19:29:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 539 transitions. [2022-07-12 19:29:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-12 19:29:38,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:38,446 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] [2022-07-12 19:29:38,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:38,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-07-12 19:29:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363873323] [2022-07-12 19:29:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:38,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:38,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:38,657 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:29:38,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-12 19:29:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:38,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:29:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:38,753 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 [2022-07-12 19:29:38,812 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-12 19:29:38,813 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 [2022-07-12 19:29:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:38,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:29:38,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363873323] [2022-07-12 19:29:38,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363873323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:29:38,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:38,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-12 19:29:38,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644939432] [2022-07-12 19:29:38,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:38,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 19:29:38,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 19:29:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 19:29:38,936 INFO L87 Difference]: Start difference. First operand 402 states and 539 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:39,122 INFO L93 Difference]: Finished difference Result 434 states and 560 transitions. [2022-07-12 19:29:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:29:39,122 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 [2022-07-12 19:29:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:39,123 INFO L225 Difference]: With dead ends: 434 [2022-07-12 19:29:39,123 INFO L226 Difference]: Without dead ends: 434 [2022-07-12 19:29:39,123 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 [2022-07-12 19:29:39,124 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 36 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:39,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 163 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 19:29:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-12 19:29:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 410. [2022-07-12 19:29:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 374 states have (on average 1.3983957219251337) internal successors, (523), 393 states have internal predecessors, (523), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:29:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 547 transitions. [2022-07-12 19:29:39,131 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 547 transitions. Word has length 42 [2022-07-12 19:29:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:39,132 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 547 transitions. [2022-07-12 19:29:39,132 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) [2022-07-12 19:29:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 547 transitions. [2022-07-12 19:29:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-12 19:29:39,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:39,133 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] [2022-07-12 19:29:39,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-07-12 19:29:39,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:39,343 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1701301426, now seen corresponding path program 1 times [2022-07-12 19:29:39,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131773132] [2022-07-12 19:29:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:39,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:39,345 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) [2022-07-12 19:29:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-12 19:29:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 19:29:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:39,520 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:29:39,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 19:29:39,639 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:39,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131773132] [2022-07-12 19:29:39,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131773132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:29:39,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:39,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-12 19:29:39,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599406973] [2022-07-12 19:29:39,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:39,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:29:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:29:39,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:29:39,641 INFO L87 Difference]: Start difference. First operand 410 states and 547 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:39,797 INFO L93 Difference]: Finished difference Result 413 states and 499 transitions. [2022-07-12 19:29:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 19:29:39,798 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 [2022-07-12 19:29:39,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:39,799 INFO L225 Difference]: With dead ends: 413 [2022-07-12 19:29:39,799 INFO L226 Difference]: Without dead ends: 413 [2022-07-12 19:29:39,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-12 19:29:39,800 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 178 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:39,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 356 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 19:29:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-12 19:29:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 352. [2022-07-12 19:29:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 335 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:29:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 442 transitions. [2022-07-12 19:29:39,807 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 442 transitions. Word has length 44 [2022-07-12 19:29:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:39,807 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 442 transitions. [2022-07-12 19:29:39,807 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) [2022-07-12 19:29:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 442 transitions. [2022-07-12 19:29:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 19:29:39,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:39,811 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] [2022-07-12 19:29:39,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-12 19:29:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:40,021 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2022-07-12 19:29:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:40,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822209308] [2022-07-12 19:29:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:40,023 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) [2022-07-12 19:29:40,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-12 19:29:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:29:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:29:42,803 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 [2022-07-12 19:29:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:29:42,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:47,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822209308] [2022-07-12 19:29:47,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822209308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:47,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1967388886] [2022-07-12 19:29:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:47,370 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:29:47,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:29:47,371 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:29:47,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-12 19:29:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 19:29:47,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:29:50,106 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 [2022-07-12 19:29:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:29:50,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:29:52,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1967388886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:29:52,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:29:52,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-07-12 19:29:52,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670873447] [2022-07-12 19:29:52,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:29:52,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 19:29:52,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:52,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 19:29:52,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=78, Unknown=2, NotChecked=0, Total=110 [2022-07-12 19:29:52,362 INFO L87 Difference]: Start difference. First operand 352 states and 442 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:29:56,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:56,964 INFO L93 Difference]: Finished difference Result 413 states and 485 transitions. [2022-07-12 19:29:56,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 19:29:56,965 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 [2022-07-12 19:29:56,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:56,966 INFO L225 Difference]: With dead ends: 413 [2022-07-12 19:29:56,966 INFO L226 Difference]: Without dead ends: 413 [2022-07-12 19:29:56,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=127, Invalid=289, Unknown=4, NotChecked=0, Total=420 [2022-07-12 19:29:56,967 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 294 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:56,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 247 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 132 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-07-12 19:29:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-07-12 19:29:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 351. [2022-07-12 19:29:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 315 states have (on average 1.3142857142857143) internal successors, (414), 334 states have internal predecessors, (414), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-12 19:29:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 438 transitions. [2022-07-12 19:29:56,973 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 438 transitions. Word has length 48 [2022-07-12 19:29:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:56,974 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 438 transitions. [2022-07-12 19:29:56,974 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) [2022-07-12 19:29:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 438 transitions. [2022-07-12 19:29:56,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 19:29:56,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:56,975 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] [2022-07-12 19:29:56,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:57,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:57,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:57,379 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-07-12 19:29:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:57,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127041534] [2022-07-12 19:29:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:57,380 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:57,381 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) [2022-07-12 19:29:57,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-12 19:29:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 19:29:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:29:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-12 19:29:57,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 19:29:57,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:29:57,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127041534] [2022-07-12 19:29:57,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127041534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 19:29:57,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 19:29:57,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 19:29:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209703998] [2022-07-12 19:29:57,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 19:29:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 19:29:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:29:57,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 19:29:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 19:29:57,473 INFO L87 Difference]: Start difference. First operand 351 states and 438 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 19:29:57,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:29:57,477 INFO L93 Difference]: Finished difference Result 296 states and 351 transitions. [2022-07-12 19:29:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 19:29:57,477 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 [2022-07-12 19:29:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:29:57,478 INFO L225 Difference]: With dead ends: 296 [2022-07-12 19:29:57,478 INFO L226 Difference]: Without dead ends: 296 [2022-07-12 19:29:57,479 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 [2022-07-12 19:29:57,479 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 19:29:57,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 19:29:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-12 19:29:57,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 281. [2022-07-12 19:29:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.253968253968254) internal successors, (316), 266 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-12 19:29:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 336 transitions. [2022-07-12 19:29:57,485 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 336 transitions. Word has length 47 [2022-07-12 19:29:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:29:57,485 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 336 transitions. [2022-07-12 19:29:57,485 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) [2022-07-12 19:29:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 336 transitions. [2022-07-12 19:29:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-12 19:29:57,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:29:57,486 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] [2022-07-12 19:29:57,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-12 19:29:57,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:29:57,696 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:29:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:29:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2022-07-12 19:29:57,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:29:57,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744502070] [2022-07-12 19:29:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:29:57,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:29:57,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:29:57,698 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) [2022-07-12 19:29:57,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-12 19:29:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:29:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 19:29:57,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:00,594 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 [2022-07-12 19:30:00,704 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 [2022-07-12 19:30:00,710 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 [2022-07-12 19:30:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 19:30:00,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:02,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:30:02,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744502070] [2022-07-12 19:30:02,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744502070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:30:02,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756927410] [2022-07-12 19:30:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:02,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:30:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:30:03,001 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:30:03,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-12 19:30:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:03,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 19:30:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:07,945 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 [2022-07-12 19:30:07,998 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 [2022-07-12 19:30:08,004 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 [2022-07-12 19:30:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 19:30:08,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:10,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1756927410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:30:10,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:30:10,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2022-07-12 19:30:10,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518799359] [2022-07-12 19:30:10,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:30:10,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:30:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:30:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:30:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2022-07-12 19:30:10,195 INFO L87 Difference]: Start difference. First operand 281 states and 336 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 19:30:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:30:16,999 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2022-07-12 19:30:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:30:17,000 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 [2022-07-12 19:30:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:30:17,001 INFO L225 Difference]: With dead ends: 326 [2022-07-12 19:30:17,001 INFO L226 Difference]: Without dead ends: 326 [2022-07-12 19:30:17,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2022-07-12 19:30:17,002 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 126 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:30:17,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 231 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 182 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-07-12 19:30:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-12 19:30:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-12 19:30:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.25) internal successors, (315), 266 states have internal predecessors, (315), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-12 19:30:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 335 transitions. [2022-07-12 19:30:17,007 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 335 transitions. Word has length 50 [2022-07-12 19:30:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:30:17,007 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 335 transitions. [2022-07-12 19:30:17,008 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) [2022-07-12 19:30:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 335 transitions. [2022-07-12 19:30:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:30:17,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:30:17,008 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:30:17,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:17,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:17,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:30:17,419 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:30:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:30:17,420 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-07-12 19:30:17,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:30:17,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35093291] [2022-07-12 19:30:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:17,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:30:17,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:30:17,421 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) [2022-07-12 19:30:17,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-12 19:30:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:17,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 19:30:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:30:17,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:30:18,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:30:18,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35093291] [2022-07-12 19:30:18,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35093291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:30:18,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:30:18,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-07-12 19:30:18,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973456359] [2022-07-12 19:30:18,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:30:18,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 19:30:18,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:30:18,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 19:30:18,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-12 19:30:18,189 INFO L87 Difference]: Start difference. First operand 281 states and 335 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 19:30:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:30:18,643 INFO L93 Difference]: Finished difference Result 303 states and 345 transitions. [2022-07-12 19:30:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 19:30:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-07-12 19:30:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:30:18,644 INFO L225 Difference]: With dead ends: 303 [2022-07-12 19:30:18,644 INFO L226 Difference]: Without dead ends: 303 [2022-07-12 19:30:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-07-12 19:30:18,645 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 221 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 19:30:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 187 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 19:30:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-12 19:30:18,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 281. [2022-07-12 19:30:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.2380952380952381) internal successors, (312), 266 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-12 19:30:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 332 transitions. [2022-07-12 19:30:18,650 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 332 transitions. Word has length 51 [2022-07-12 19:30:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:30:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 332 transitions. [2022-07-12 19:30:18,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-12 19:30:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 332 transitions. [2022-07-12 19:30:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:30:18,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:30:18,652 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] [2022-07-12 19:30:18,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:18,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:30:18,859 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:30:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:30:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-07-12 19:30:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:30:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383073203] [2022-07-12 19:30:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:18,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:30:18,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:30:18,861 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:30:18,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-12 19:30:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 19:30:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:19,185 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:30:19,185 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 [2022-07-12 19:30:21,773 INFO L356 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2022-07-12 19:30:21,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 36 [2022-07-12 19:30:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:30:21,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:21,952 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:30:21,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 108 [2022-07-12 19:30:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:30:26,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:30:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383073203] [2022-07-12 19:30:26,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383073203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:30:26,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:30:26,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-07-12 19:30:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901391729] [2022-07-12 19:30:26,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:30:26,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:30:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:30:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:30:26,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=303, Unknown=3, NotChecked=0, Total=380 [2022-07-12 19:30:26,825 INFO L87 Difference]: Start difference. First operand 281 states and 332 transitions. Second operand has 20 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:30:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:30:29,723 INFO L93 Difference]: Finished difference Result 314 states and 353 transitions. [2022-07-12 19:30:29,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:30:29,724 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 [2022-07-12 19:30:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:30:29,725 INFO L225 Difference]: With dead ends: 314 [2022-07-12 19:30:29,725 INFO L226 Difference]: Without dead ends: 314 [2022-07-12 19:30:29,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=152, Invalid=547, Unknown=3, NotChecked=0, Total=702 [2022-07-12 19:30:29,726 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 214 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:30:29,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 418 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 259 Invalid, 0 Unknown, 174 Unchecked, 0.6s Time] [2022-07-12 19:30:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-12 19:30:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 288. [2022-07-12 19:30:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.2061068702290076) internal successors, (316), 273 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 19:30:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2022-07-12 19:30:29,737 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 51 [2022-07-12 19:30:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:30:29,738 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2022-07-12 19:30:29,738 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) [2022-07-12 19:30:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2022-07-12 19:30:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-12 19:30:29,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:30:29,740 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] [2022-07-12 19:30:29,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:29,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:30:29,952 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:30:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:30:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2022-07-12 19:30:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:30:29,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852760956] [2022-07-12 19:30:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:29,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:30:29,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:30:29,954 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) [2022-07-12 19:30:29,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-12 19:30:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:30,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:30:30,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:32,644 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 [2022-07-12 19:30:34,908 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:30:34,909 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 [2022-07-12 19:30:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:35,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:30:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:30:35,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:35,897 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:30:35,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 19:30:38,464 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:30:38,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 19:30:42,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:30:42,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852760956] [2022-07-12 19:30:42,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852760956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:30:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906030076] [2022-07-12 19:30:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:42,972 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:30:42,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:30:42,973 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) [2022-07-12 19:30:42,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-12 19:30:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:30:43,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:45,646 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 [2022-07-12 19:30:45,878 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:30:45,879 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 [2022-07-12 19:30:48,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:30:48,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-12 19:30:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:30:48,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:48,358 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:30:48,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 19:30:50,811 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-12 19:30:50,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-07-12 19:30:53,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906030076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:30:53,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:30:53,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-12 19:30:53,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371079300] [2022-07-12 19:30:53,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:30:53,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:30:53,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:30:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:30:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=156, Unknown=4, NotChecked=0, Total=210 [2022-07-12 19:30:53,260 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:30:57,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:30:57,809 INFO L93 Difference]: Finished difference Result 335 states and 377 transitions. [2022-07-12 19:30:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 19:30:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-07-12 19:30:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:30:57,810 INFO L225 Difference]: With dead ends: 335 [2022-07-12 19:30:57,810 INFO L226 Difference]: Without dead ends: 335 [2022-07-12 19:30:57,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=122, Invalid=292, Unknown=6, NotChecked=0, Total=420 [2022-07-12 19:30:57,814 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 169 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 19:30:57,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-07-12 19:30:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-12 19:30:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2022-07-12 19:30:57,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 273 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 19:30:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2022-07-12 19:30:57,821 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 51 [2022-07-12 19:30:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:30:57,821 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2022-07-12 19:30:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:30:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2022-07-12 19:30:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 19:30:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:30:57,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 19:30:57,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:58,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:58,235 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 [2022-07-12 19:30:58,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:30:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:30:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-07-12 19:30:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:30:58,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990290644] [2022-07-12 19:30:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:58,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:30:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:30:58,238 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) [2022-07-12 19:30:58,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-12 19:30:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:30:58,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 19:30:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:30:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:30:58,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:30:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 19:30:59,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:30:59,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990290644] [2022-07-12 19:30:59,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990290644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 19:30:59,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:30:59,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-07-12 19:30:59,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921267158] [2022-07-12 19:30:59,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:30:59,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 19:30:59,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:30:59,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 19:30:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-12 19:30:59,042 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:30:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:30:59,725 INFO L93 Difference]: Finished difference Result 299 states and 339 transitions. [2022-07-12 19:30:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 19:30:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-07-12 19:30:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:30:59,727 INFO L225 Difference]: With dead ends: 299 [2022-07-12 19:30:59,727 INFO L226 Difference]: Without dead ends: 299 [2022-07-12 19:30:59,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-07-12 19:30:59,728 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 228 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:30:59,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 243 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 19:30:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-07-12 19:30:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 287. [2022-07-12 19:30:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1793893129770991) internal successors, (309), 272 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 19:30:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2022-07-12 19:30:59,733 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 52 [2022-07-12 19:30:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:30:59,734 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2022-07-12 19:30:59,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 19:30:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2022-07-12 19:30:59,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 19:30:59,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:30:59,735 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] [2022-07-12 19:30:59,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-12 19:30:59,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-12 19:30:59,939 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:30:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:30:59,940 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-07-12 19:30:59,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:30:59,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985971746] [2022-07-12 19:30:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:30:59,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:30:59,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:30:59,941 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) [2022-07-12 19:30:59,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-07-12 19:31:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:31:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 19:31:00,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:31:00,413 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:31:00,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-12 19:31:03,232 INFO L356 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2022-07-12 19:31:03,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 49 [2022-07-12 19:31:03,374 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 [2022-07-12 19:31:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:31:03,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:31:03,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:31:03,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985971746] [2022-07-12 19:31:03,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985971746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:31:03,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260824118] [2022-07-12 19:31:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:31:03,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:31:03,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:31:03,753 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:31:03,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-07-12 19:31:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:31:03,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 19:31:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:31:04,396 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 19:31:04,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 39 [2022-07-12 19:31:07,132 INFO L356 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2022-07-12 19:31:07,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 66 [2022-07-12 19:31:07,330 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 [2022-07-12 19:31:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:31:07,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:31:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260824118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:31:09,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:31:09,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2022-07-12 19:31:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118841815] [2022-07-12 19:31:09,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:31:09,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 19:31:09,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:31:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 19:31:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=513, Unknown=2, NotChecked=0, Total=600 [2022-07-12 19:31:09,633 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:31:21,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:31:21,290 INFO L93 Difference]: Finished difference Result 305 states and 339 transitions. [2022-07-12 19:31:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 19:31:21,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-07-12 19:31:21,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:31:21,291 INFO L225 Difference]: With dead ends: 305 [2022-07-12 19:31:21,291 INFO L226 Difference]: Without dead ends: 305 [2022-07-12 19:31:21,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=242, Invalid=1011, Unknown=7, NotChecked=0, Total=1260 [2022-07-12 19:31:21,293 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 398 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 19:31:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 308 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 239 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-07-12 19:31:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-12 19:31:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 287. [2022-07-12 19:31:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1755725190839694) internal successors, (308), 272 states have internal predecessors, (308), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-12 19:31:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 327 transitions. [2022-07-12 19:31:21,297 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 327 transitions. Word has length 52 [2022-07-12 19:31:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:31:21,297 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 327 transitions. [2022-07-12 19:31:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 19:31:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 327 transitions. [2022-07-12 19:31:21,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 19:31:21,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:31:21,298 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] [2022-07-12 19:31:21,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-07-12 19:31:21,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-07-12 19:31:21,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:31:21,709 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:31:21,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:31:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2022-07-12 19:31:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:31:21,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517874575] [2022-07-12 19:31:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:31:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:31:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:31:21,711 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) [2022-07-12 19:31:21,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-07-12 19:31:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:31:21,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-12 19:31:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:31:22,353 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:31:22,354 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 [2022-07-12 19:31:22,940 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:31:22,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-12 19:31:23,407 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 [2022-07-12 19:31:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:31:23,621 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 [2022-07-12 19:31:23,871 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 [2022-07-12 19:31:23,876 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 15 treesize of output 7 [2022-07-12 19:31:23,958 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:31:23,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-12 19:31:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:31:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:31:24,599 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 [2022-07-12 19:31:24,635 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-12 19:31:24,636 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 [2022-07-12 19:31:24,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-12 19:31:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517874575] [2022-07-12 19:31:24,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517874575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:31:24,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171059498] [2022-07-12 19:31:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:31:24,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-12 19:31:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-12 19:31:24,750 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-12 19:31:24,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-07-12 19:31:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:31:24,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 19:31:24,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:31:25,495 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 19:31:25,496 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 [2022-07-12 19:31:25,921 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-12 19:31:25,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-07-12 19:31:26,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-12 19:31:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 19:31:26,420 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 [2022-07-12 19:31:26,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-12 19:31:26,610 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 [2022-07-12 19:31:26,637 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-12 19:31:26,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2022-07-12 19:31:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:31:26,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 19:31:26,899 INFO L356 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-07-12 19:31:26,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-07-12 19:31:26,920 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 [2022-07-12 19:31:26,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [171059498] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 19:31:26,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 19:31:26,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2022-07-12 19:31:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097595036] [2022-07-12 19:31:26,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 19:31:26,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 19:31:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-12 19:31:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 19:31:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-07-12 19:31:26,999 INFO L87 Difference]: Start difference. First operand 287 states and 327 transitions. Second operand has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:31:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 19:31:42,513 INFO L93 Difference]: Finished difference Result 398 states and 451 transitions. [2022-07-12 19:31:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 19:31:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-07-12 19:31:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 19:31:42,515 INFO L225 Difference]: With dead ends: 398 [2022-07-12 19:31:42,515 INFO L226 Difference]: Without dead ends: 398 [2022-07-12 19:31:42,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=340, Invalid=1137, Unknown=5, NotChecked=0, Total=1482 [2022-07-12 19:31:42,516 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 291 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 19:31:42,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 313 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 120 Invalid, 0 Unknown, 276 Unchecked, 0.4s Time] [2022-07-12 19:31:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-07-12 19:31:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 344. [2022-07-12 19:31:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 314 states have (on average 1.1624203821656052) internal successors, (365), 325 states have internal predecessors, (365), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-12 19:31:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 392 transitions. [2022-07-12 19:31:42,521 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 392 transitions. Word has length 53 [2022-07-12 19:31:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 19:31:42,521 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 392 transitions. [2022-07-12 19:31:42,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.1875) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 19:31:42,521 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 392 transitions. [2022-07-12 19:31:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 19:31:42,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 19:31:42,522 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] [2022-07-12 19:31:42,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-07-12 19:31:42,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-07-12 19:31:42,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-12 19:31:42,924 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-07-12 19:31:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 19:31:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-07-12 19:31:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-12 19:31:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251247651] [2022-07-12 19:31:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 19:31:42,925 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-12 19:31:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-12 19:31:42,926 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-12 19:31:42,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-07-12 19:31:43,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 19:31:43,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 19:31:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 19:31:43,186 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-12 19:31:43,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 24 [2022-07-12 19:31:45,567 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-12 19:31:45,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 41 [2022-07-12 19:31:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 19:31:45,684 INFO L328 TraceCheckSpWp]: Computing backward predicates...