./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/array-memsafety/cstrchr-alloca-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 276936ba1494f32a328b3de86f664a380d5263e9 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:41:44,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:41:44,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:41:44,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:41:44,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:41:44,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:41:44,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:41:44,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:41:44,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:41:44,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:41:44,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:41:44,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:41:44,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:41:44,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:41:44,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:41:44,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:41:44,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:41:44,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:41:44,367 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:41:44,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:41:44,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:41:44,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:41:44,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:41:44,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:41:44,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:41:44,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:41:44,373 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:41:44,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:41:44,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:41:44,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:41:44,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:41:44,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:41:44,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:41:44,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:41:44,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:41:44,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:41:44,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:41:44,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:41:44,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:41:44,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:41:44,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:41:44,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:41:44,415 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:41:44,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:41:44,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:41:44,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:41:44,417 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:41:44,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:41:44,417 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:41:44,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:41:44,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:41:44,417 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:41:44,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:41:44,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:41:44,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:41:44,419 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:41:44,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:41:44,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:41:44,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:41:44,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:44,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:41:44,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:41:44,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:41:44,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:41:44,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:41:44,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 276936ba1494f32a328b3de86f664a380d5263e9 [2021-08-27 04:41:44,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:41:44,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:41:44,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:41:44,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:41:44,664 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:41:44,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-08-27 04:41:45,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a016bc493/e62a48875c244d129802a9deac7094f5/FLAG8bd00ac79 [2021-08-27 04:41:45,782 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:41:45,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2021-08-27 04:41:45,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a016bc493/e62a48875c244d129802a9deac7094f5/FLAG8bd00ac79 [2021-08-27 04:41:46,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a016bc493/e62a48875c244d129802a9deac7094f5 [2021-08-27 04:41:46,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:41:46,135 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:41:46,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:46,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:41:46,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:41:46,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd4dc7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46, skipping insertion in model container [2021-08-27 04:41:46,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:41:46,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:41:46,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:46,395 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:41:46,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:46,463 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:41:46,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46 WrapperNode [2021-08-27 04:41:46,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:46,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:41:46,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:41:46,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:41:46,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:41:46,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:41:46,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:41:46,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:41:46,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (1/1) ... [2021-08-27 04:41:46,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:46,565 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:41:46,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:41:46,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:41:46,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:41:46,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2021-08-27 04:41:46,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:41:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:41:46,593 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:41:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:41:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:41:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:41:46,597 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:41:46,598 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:41:46,599 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:41:46,600 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:41:46,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:41:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:41:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:41:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:41:46,602 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:41:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:41:46,607 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:41:46,608 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:41:46,609 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:41:46,610 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:41:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:41:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:41:46,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:41:46,901 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 04:41:46,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46 BoogieIcfgContainer [2021-08-27 04:41:46,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:41:46,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:41:46,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:41:46,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:41:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:41:46" (1/3) ... [2021-08-27 04:41:46,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6f613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:46, skipping insertion in model container [2021-08-27 04:41:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:46" (2/3) ... [2021-08-27 04:41:46,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be6f613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:46, skipping insertion in model container [2021-08-27 04:41:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46" (3/3) ... [2021-08-27 04:41:46,907 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2021-08-27 04:41:46,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:41:46,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2021-08-27 04:41:46,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:41:46,937 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:41:46,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-27 04:41:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:46,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:46,949 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:46,950 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232828, now seen corresponding path program 1 times [2021-08-27 04:41:46,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:46,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742652595] [2021-08-27 04:41:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:46,958 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742652595] [2021-08-27 04:41:47,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742652595] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:47,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608263588] [2021-08-27 04:41:47,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 04:41:47,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 04:41:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:41:47,071 INFO L87 Difference]: Start difference. First operand has 43 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,113 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-08-27 04:41:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 04:41:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 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 10 [2021-08-27 04:41:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,118 INFO L225 Difference]: With dead ends: 43 [2021-08-27 04:41:47,118 INFO L226 Difference]: Without dead ends: 40 [2021-08-27 04:41:47,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 04:41:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-27 04:41:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-27 04:41:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.625) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-08-27 04:41:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-08-27 04:41:47,138 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2021-08-27 04:41:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,138 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-08-27 04:41:47,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-08-27 04:41:47,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:47,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,139 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:41:47,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232518, now seen corresponding path program 1 times [2021-08-27 04:41:47,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782025324] [2021-08-27 04:41:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782025324] [2021-08-27 04:41:47,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782025324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:47,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026417462] [2021-08-27 04:41:47,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:47,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,187 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,241 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-08-27 04:41:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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 10 [2021-08-27 04:41:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,243 INFO L225 Difference]: With dead ends: 38 [2021-08-27 04:41:47,243 INFO L226 Difference]: Without dead ends: 38 [2021-08-27 04:41:47,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-27 04:41:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-27 04:41:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 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) [2021-08-27 04:41:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-08-27 04:41:47,246 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2021-08-27 04:41:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,247 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-08-27 04:41:47,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-08-27 04:41:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:47,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,247 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:41:47,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr3REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232519, now seen corresponding path program 1 times [2021-08-27 04:41:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372747537] [2021-08-27 04:41:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372747537] [2021-08-27 04:41:47,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372747537] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:47,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202524124] [2021-08-27 04:41:47,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:47,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:47,301 INFO L87 Difference]: Start difference. First operand 38 states and 42 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,369 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-08-27 04:41:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:47,369 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, (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 10 [2021-08-27 04:41:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,370 INFO L225 Difference]: With dead ends: 37 [2021-08-27 04:41:47,370 INFO L226 Difference]: Without dead ends: 37 [2021-08-27 04:41:47,370 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-27 04:41:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-27 04:41:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 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) [2021-08-27 04:41:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-08-27 04:41:47,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2021-08-27 04:41:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,373 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-08-27 04:41:47,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-08-27 04:41:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:47,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,374 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:41:47,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232572, now seen corresponding path program 1 times [2021-08-27 04:41:47,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409397854] [2021-08-27 04:41:47,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409397854] [2021-08-27 04:41:47,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409397854] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:47,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670338172] [2021-08-27 04:41:47,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:47,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:47,423 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,501 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-08-27 04:41:47,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:47,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 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 10 [2021-08-27 04:41:47,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,504 INFO L225 Difference]: With dead ends: 45 [2021-08-27 04:41:47,504 INFO L226 Difference]: Without dead ends: 45 [2021-08-27 04:41:47,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-27 04:41:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-08-27 04:41:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 33 states have internal predecessors, (38), 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) [2021-08-27 04:41:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-08-27 04:41:47,513 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2021-08-27 04:41:47,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,514 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-08-27 04:41:47,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-08-27 04:41:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 04:41:47,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:41:47,516 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1287292154, now seen corresponding path program 1 times [2021-08-27 04:41:47,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607222416] [2021-08-27 04:41:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607222416] [2021-08-27 04:41:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607222416] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:47,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268071259] [2021-08-27 04:41:47,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:47,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,619 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,698 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-08-27 04:41:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:47,699 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 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 10 [2021-08-27 04:41:47,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,699 INFO L225 Difference]: With dead ends: 49 [2021-08-27 04:41:47,700 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 04:41:47,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 04:41:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-08-27 04:41:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-08-27 04:41:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-08-27 04:41:47,702 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2021-08-27 04:41:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,703 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-08-27 04:41:47,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-08-27 04:41:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:47,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,703 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:41:47,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrchrErr0REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -554371049, now seen corresponding path program 1 times [2021-08-27 04:41:47,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112591514] [2021-08-27 04:41:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112591514] [2021-08-27 04:41:47,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112591514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107503204] [2021-08-27 04:41:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:47,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,748 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,820 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-08-27 04:41:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2021-08-27 04:41:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,822 INFO L225 Difference]: With dead ends: 38 [2021-08-27 04:41:47,822 INFO L226 Difference]: Without dead ends: 38 [2021-08-27 04:41:47,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-27 04:41:47,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-27 04:41:47,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 32 states have internal predecessors, (38), 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) [2021-08-27 04:41:47,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-27 04:41:47,824 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2021-08-27 04:41:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,825 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-27 04:41:47,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-27 04:41:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:47,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:41:47,826 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,826 INFO L82 PathProgramCache]: Analyzing trace with hash -554371048, now seen corresponding path program 1 times [2021-08-27 04:41:47,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745154330] [2021-08-27 04:41:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745154330] [2021-08-27 04:41:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745154330] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:41:47,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531874515] [2021-08-27 04:41:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:47,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:47,902 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,008 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-08-27 04:41:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:48,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2021-08-27 04:41:48,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,010 INFO L225 Difference]: With dead ends: 49 [2021-08-27 04:41:48,010 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 04:41:48,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:41:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 04:41:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-08-27 04:41:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 39 states have internal predecessors, (47), 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) [2021-08-27 04:41:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-08-27 04:41:48,013 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2021-08-27 04:41:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,014 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-08-27 04:41:48,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-08-27 04:41:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:48,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,014 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:41:48,015 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1315055555, now seen corresponding path program 1 times [2021-08-27 04:41:48,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80971734] [2021-08-27 04:41:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:48,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80971734] [2021-08-27 04:41:48,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80971734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:48,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413574375] [2021-08-27 04:41:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:48,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:48,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:48,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:41:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:41:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:48,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:41:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413574375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:48,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:48,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:41:48,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112347305] [2021-08-27 04:41:48,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:41:48,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:48,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:41:48,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:48,309 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,407 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-08-27 04:41:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:48,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 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 14 [2021-08-27 04:41:48,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,409 INFO L225 Difference]: With dead ends: 52 [2021-08-27 04:41:48,409 INFO L226 Difference]: Without dead ends: 52 [2021-08-27 04:41:48,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-27 04:41:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-08-27 04:41:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.303030303030303) internal successors, (43), 36 states have internal predecessors, (43), 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) [2021-08-27 04:41:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-08-27 04:41:48,412 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 14 [2021-08-27 04:41:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,413 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-08-27 04:41:48,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-08-27 04:41:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 04:41:48,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:48,629 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:48,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,629 INFO L82 PathProgramCache]: Analyzing trace with hash -319565009, now seen corresponding path program 1 times [2021-08-27 04:41:48,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020635371] [2021-08-27 04:41:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:48,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020635371] [2021-08-27 04:41:48,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020635371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:48,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:48,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:48,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462646703] [2021-08-27 04:41:48,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:48,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:48,659 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,701 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-08-27 04:41:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 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 18 [2021-08-27 04:41:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,702 INFO L225 Difference]: With dead ends: 44 [2021-08-27 04:41:48,702 INFO L226 Difference]: Without dead ends: 44 [2021-08-27 04:41:48,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-27 04:41:48,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-27 04:41:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 38 states have internal predecessors, (45), 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) [2021-08-27 04:41:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-08-27 04:41:48,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 18 [2021-08-27 04:41:48,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,704 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-08-27 04:41:48,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-08-27 04:41:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:41:48,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,705 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:41:48,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:48,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2129811308, now seen corresponding path program 1 times [2021-08-27 04:41:48,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804056604] [2021-08-27 04:41:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:48,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804056604] [2021-08-27 04:41:48,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804056604] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:48,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:48,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:41:48,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520369909] [2021-08-27 04:41:48,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:41:48,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:41:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:41:48,829 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,977 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-08-27 04:41:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 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 20 [2021-08-27 04:41:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,978 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:41:48,979 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:41:48,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:41:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:41:48,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-08-27 04:41:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-08-27 04:41:48,982 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 20 [2021-08-27 04:41:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,982 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-08-27 04:41:48,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-08-27 04:41:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:41:48,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:41:48,983 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1118694058, now seen corresponding path program 1 times [2021-08-27 04:41:48,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073467772] [2021-08-27 04:41:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073467772] [2021-08-27 04:41:49,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073467772] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:49,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:49,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:41:49,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152031540] [2021-08-27 04:41:49,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:41:49,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:41:49,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:41:49,094 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:49,273 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-08-27 04:41:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:41:49,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 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 20 [2021-08-27 04:41:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:49,276 INFO L225 Difference]: With dead ends: 77 [2021-08-27 04:41:49,276 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 04:41:49,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:41:49,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 04:41:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-08-27 04:41:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-08-27 04:41:49,284 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 20 [2021-08-27 04:41:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:49,284 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-08-27 04:41:49,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-08-27 04:41:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 04:41:49,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:41:49,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash 842532891, now seen corresponding path program 1 times [2021-08-27 04:41:49,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:49,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776350261] [2021-08-27 04:41:49,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-27 04:41:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776350261] [2021-08-27 04:41:49,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776350261] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:49,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:49,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:49,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939404855] [2021-08-27 04:41:49,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:49,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:49,357 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:49,387 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-08-27 04:41:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-08-27 04:41:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:49,388 INFO L225 Difference]: With dead ends: 57 [2021-08-27 04:41:49,388 INFO L226 Difference]: Without dead ends: 34 [2021-08-27 04:41:49,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:49,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-27 04:41:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-27 04:41:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-27 04:41:49,395 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2021-08-27 04:41:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:49,396 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-27 04:41:49,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-27 04:41:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 04:41:49,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,397 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:41:49,397 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1168131629, now seen corresponding path program 1 times [2021-08-27 04:41:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:49,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948809004] [2021-08-27 04:41:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948809004] [2021-08-27 04:41:49,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948809004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:49,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920782991] [2021-08-27 04:41:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:49,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:49,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:49,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:41:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:41:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920782991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:49,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:49,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-27 04:41:49,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692399934] [2021-08-27 04:41:49,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:41:49,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:41:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:41:49,811 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:49,934 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-08-27 04:41:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-08-27 04:41:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:49,935 INFO L225 Difference]: With dead ends: 45 [2021-08-27 04:41:49,935 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 04:41:49,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:41:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 04:41:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-08-27 04:41:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-27 04:41:49,937 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2021-08-27 04:41:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:49,938 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-27 04:41:49,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-27 04:41:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:41:49,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,939 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-27 04:41:50,154 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1984823745, now seen corresponding path program 2 times [2021-08-27 04:41:50,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58698933] [2021-08-27 04:41:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58698933] [2021-08-27 04:41:50,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58698933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:50,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002685031] [2021-08-27 04:41:50,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:41:50,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:50,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:50,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:50,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:41:50,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:41:50,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:41:50,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:50,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-08-27 04:41:51,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:41:51,015 INFO L388 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 33 treesize of output 33 [2021-08-27 04:41:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002685031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:51,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:51,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-08-27 04:41:51,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567879622] [2021-08-27 04:41:51,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:41:51,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:41:51,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:41:51,194 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,264 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-27 04:41:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:41:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-08-27 04:41:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,265 INFO L225 Difference]: With dead ends: 68 [2021-08-27 04:41:52,265 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 04:41:52,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 04:41:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 04:41:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2021-08-27 04:41:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-08-27 04:41:52,267 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2021-08-27 04:41:52,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,267 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-08-27 04:41:52,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 21 states have internal predecessors, (49), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-08-27 04:41:52,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 04:41:52,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,268 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:52,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,468 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash -77155368, now seen corresponding path program 3 times [2021-08-27 04:41:52,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254208270] [2021-08-27 04:41:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254208270] [2021-08-27 04:41:52,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254208270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817292625] [2021-08-27 04:41:52,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:41:52,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:52,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:52,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:41:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:41:52,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:52,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:41:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:52,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:41:53,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:41:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817292625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:53,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-08-27 04:41:53,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984053763] [2021-08-27 04:41:53,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:41:53,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:41:53,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:41:53,180 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,640 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-08-27 04:41:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:41:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-08-27 04:41:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,641 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:41:53,641 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 04:41:53,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:41:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 04:41:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-08-27 04:41:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-27 04:41:53,643 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2021-08-27 04:41:53,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,643 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-27 04:41:53,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 20 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-27 04:41:53,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 04:41:53,644 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,644 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:53,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:53,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 04:41:53,844 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash -488427557, now seen corresponding path program 4 times [2021-08-27 04:41:53,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014224431] [2021-08-27 04:41:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014224431] [2021-08-27 04:41:53,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014224431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596577375] [2021-08-27 04:41:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:41:53,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:53,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:54,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:41:54,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:41:54,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:41:54,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:54,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:41:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-08-27 04:41:54,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:41:54,695 INFO L388 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 19 treesize of output 19 [2021-08-27 04:41:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:54,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596577375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:54,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:54,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2021-08-27 04:41:54,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802221370] [2021-08-27 04:41:54,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 04:41:54,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 04:41:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:41:54,903 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:55,495 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-27 04:41:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:41:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-08-27 04:41:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:55,496 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:41:55,496 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:41:55,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:41:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:41:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-27 04:41:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-08-27 04:41:55,498 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2021-08-27 04:41:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:55,498 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-08-27 04:41:55,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 22 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-08-27 04:41:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:41:55,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:55,499 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:55,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:55,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-27 04:41:55,700 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 444231919, now seen corresponding path program 5 times [2021-08-27 04:41:55,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:55,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528968660] [2021-08-27 04:41:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:55,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:55,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528968660] [2021-08-27 04:41:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528968660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358855445] [2021-08-27 04:41:55,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:41:55,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:55,943 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:55,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:41:56,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-27 04:41:56,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:41:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:56,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:41:56,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:41:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:56,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358855445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:56,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:56,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2021-08-27 04:41:56,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751531433] [2021-08-27 04:41:56,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:41:56,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:41:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:41:56,597 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:57,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:57,182 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-08-27 04:41:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:41:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:41:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:57,183 INFO L225 Difference]: With dead ends: 92 [2021-08-27 04:41:57,183 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:41:57,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:41:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:41:57,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-08-27 04:41:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-08-27 04:41:57,184 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 50 [2021-08-27 04:41:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:57,184 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-08-27 04:41:57,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 23 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-08-27 04:41:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 04:41:57,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:57,185 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:57,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 04:41:57,385 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1547306290, now seen corresponding path program 6 times [2021-08-27 04:41:57,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:57,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106254027] [2021-08-27 04:41:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:57,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:57,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106254027] [2021-08-27 04:41:57,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106254027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:57,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449209081] [2021-08-27 04:41:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:41:57,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:57,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:57,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:57,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:41:57,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:41:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 04:41:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:57,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:41:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:58,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449209081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:58,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:58,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-08-27 04:41:58,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538867325] [2021-08-27 04:41:58,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:41:58,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:41:58,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:41:58,350 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:58,871 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2021-08-27 04:41:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:41:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-08-27 04:41:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:58,872 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:41:58,872 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:41:58,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 477.4ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:41:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:41:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 04:41:58,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2021-08-27 04:41:58,874 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 54 [2021-08-27 04:41:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:58,874 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2021-08-27 04:41:58,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.730769230769231) internal successors, (97), 24 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2021-08-27 04:41:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-27 04:41:58,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:58,875 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:58,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:59,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:59,097 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:41:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:59,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1155246342, now seen corresponding path program 7 times [2021-08-27 04:41:59,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:59,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888548980] [2021-08-27 04:41:59,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:59,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:59,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:59,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888548980] [2021-08-27 04:41:59,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888548980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:59,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679542672] [2021-08-27 04:41:59,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:41:59,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:59,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:59,369 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:59,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:41:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 04:41:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:42:00,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:42:00,124 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679542672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:00,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:00,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2021-08-27 04:42:00,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708322508] [2021-08-27 04:42:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:00,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:00,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:00,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:00,126 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 26 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:00,888 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-08-27 04:42:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:42:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 26 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-08-27 04:42:00,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:00,889 INFO L225 Difference]: With dead ends: 108 [2021-08-27 04:42:00,889 INFO L226 Difference]: Without dead ends: 77 [2021-08-27 04:42:00,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 604.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:42:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-27 04:42:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-08-27 04:42:00,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 69 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-08-27 04:42:00,892 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 60 [2021-08-27 04:42:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-08-27 04:42:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 26 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-08-27 04:42:00,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-27 04:42:00,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:00,894 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:00,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:01,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:01,094 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:01,094 INFO L82 PathProgramCache]: Analyzing trace with hash -754121335, now seen corresponding path program 8 times [2021-08-27 04:42:01,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:01,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425906021] [2021-08-27 04:42:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:01,095 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:01,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:01,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:01,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425906021] [2021-08-27 04:42:01,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425906021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:01,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619244334] [2021-08-27 04:42:01,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:01,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:01,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:01,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:42:01,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:01,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:42:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:02,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619244334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:02,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:02,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-27 04:42:02,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621861892] [2021-08-27 04:42:02,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:42:02,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:02,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:42:02,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:02,192 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 24 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,751 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-08-27 04:42:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:42:02,752 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 24 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-08-27 04:42:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,752 INFO L225 Difference]: With dead ends: 82 [2021-08-27 04:42:02,752 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 04:42:02,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:42:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 04:42:02,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-27 04:42:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-08-27 04:42:02,755 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2021-08-27 04:42:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,755 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-08-27 04:42:02,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 24 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,755 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-08-27 04:42:02,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-27 04:42:02,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,756 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:02,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:02,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:02,969 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash 195873821, now seen corresponding path program 9 times [2021-08-27 04:42:02,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593270482] [2021-08-27 04:42:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:03,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:03,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593270482] [2021-08-27 04:42:03,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593270482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:03,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109969429] [2021-08-27 04:42:03,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:03,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:03,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:03,269 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:03,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:42:03,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-27 04:42:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 04:42:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:03,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-08-27 04:42:13,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:13,424 INFO L388 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 33 treesize of output 33 [2021-08-27 04:42:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:13,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109969429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:13,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:13,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-27 04:42:13,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233377105] [2021-08-27 04:42:13,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:42:13,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:42:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1419, Unknown=3, NotChecked=0, Total=1560 [2021-08-27 04:42:13,740 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 37 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:32,507 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2021-08-27 04:42:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 04:42:32,508 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 37 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-08-27 04:42:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:32,508 INFO L225 Difference]: With dead ends: 132 [2021-08-27 04:42:32,508 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 04:42:32,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 26438.7ms TimeCoverageRelationStatistics Valid=560, Invalid=4129, Unknown=3, NotChecked=0, Total=4692 [2021-08-27 04:42:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 04:42:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2021-08-27 04:42:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-08-27 04:42:32,511 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 70 [2021-08-27 04:42:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:32,511 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-08-27 04:42:32,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 37 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-08-27 04:42:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-27 04:42:32,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:32,511 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:32,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-27 04:42:32,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-27 04:42:32,721 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 383797812, now seen corresponding path program 10 times [2021-08-27 04:42:32,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:32,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57678741] [2021-08-27 04:42:32,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:32,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:33,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:33,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:33,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57678741] [2021-08-27 04:42:33,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57678741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:33,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233827990] [2021-08-27 04:42:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:33,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:33,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:33,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:33,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:42:33,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:33,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:42:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:33,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:42:34,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2021-08-27 04:42:34,824 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:42:34,824 INFO L388 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 34 treesize of output 25 [2021-08-27 04:42:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 121 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:34,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233827990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:34,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:34,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2021-08-27 04:42:34,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759632003] [2021-08-27 04:42:34,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:42:34,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:42:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:42:34,843 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:36,297 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-08-27 04:42:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:42:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-08-27 04:42:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:36,298 INFO L225 Difference]: With dead ends: 140 [2021-08-27 04:42:36,298 INFO L226 Difference]: Without dead ends: 97 [2021-08-27 04:42:36,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1456.1ms TimeCoverageRelationStatistics Valid=334, Invalid=3448, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 04:42:36,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-27 04:42:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-08-27 04:42:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-08-27 04:42:36,301 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 80 [2021-08-27 04:42:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:36,301 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-08-27 04:42:36,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4878048780487805) internal successors, (143), 38 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-08-27 04:42:36,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-27 04:42:36,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:36,302 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:36,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:36,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-27 04:42:36,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:36,503 INFO L82 PathProgramCache]: Analyzing trace with hash 219236151, now seen corresponding path program 11 times [2021-08-27 04:42:36,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:36,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090846132] [2021-08-27 04:42:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:36,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:36,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:36,870 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:36,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:36,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090846132] [2021-08-27 04:42:36,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090846132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:36,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179631200] [2021-08-27 04:42:36,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:36,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:36,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:36,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:36,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:42:37,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-27 04:42:37,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:42:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:42:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:38,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179631200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:38,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:38,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 28 [2021-08-27 04:42:38,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647814707] [2021-08-27 04:42:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:38,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:38,098 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 29 states, 28 states have (on average 4.642857142857143) internal successors, (130), 27 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:38,869 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-08-27 04:42:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:42:38,870 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.642857142857143) internal successors, (130), 27 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-27 04:42:38,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:38,870 INFO L225 Difference]: With dead ends: 102 [2021-08-27 04:42:38,870 INFO L226 Difference]: Without dead ends: 100 [2021-08-27 04:42:38,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 563.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:42:38,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-27 04:42:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-27 04:42:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-08-27 04:42:38,873 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 84 [2021-08-27 04:42:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:38,873 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-08-27 04:42:38,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.642857142857143) internal successors, (130), 27 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:38,873 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-08-27 04:42:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-27 04:42:38,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:38,874 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:38,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:39,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 04:42:39,074 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 473469771, now seen corresponding path program 12 times [2021-08-27 04:42:39,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:39,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299212945] [2021-08-27 04:42:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:39,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:39,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:39,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:39,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299212945] [2021-08-27 04:42:39,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299212945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:39,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137434984] [2021-08-27 04:42:39,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:39,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:39,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:39,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:39,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:42:40,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-27 04:42:40,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:40,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 04:42:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:40,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-08-27 04:42:40,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:42:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:40,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137434984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:40,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 38 [2021-08-27 04:42:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585570037] [2021-08-27 04:42:40,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:42:40,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:42:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:42:40,912 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:42,326 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-08-27 04:42:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:42:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-08-27 04:42:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:42,327 INFO L225 Difference]: With dead ends: 156 [2021-08-27 04:42:42,327 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 04:42:42,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1074.5ms TimeCoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:42:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 04:42:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-08-27 04:42:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 99 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-08-27 04:42:42,329 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 90 [2021-08-27 04:42:42,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:42,329 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-08-27 04:42:42,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-08-27 04:42:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 04:42:42,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:42,330 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:42,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 04:42:42,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 04:42:42,530 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:42,531 INFO L82 PathProgramCache]: Analyzing trace with hash -641767282, now seen corresponding path program 13 times [2021-08-27 04:42:42,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:42,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129419311] [2021-08-27 04:42:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:42,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:42,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:42,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:42,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129419311] [2021-08-27 04:42:42,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129419311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:42,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951756332] [2021-08-27 04:42:42,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:42,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:42,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:42,934 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:42,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:42:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 04:42:43,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951756332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:44,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:44,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-08-27 04:42:44,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967084703] [2021-08-27 04:42:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:42:44,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:42:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:42:44,297 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:45,371 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2021-08-27 04:42:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 04:42:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-08-27 04:42:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:45,373 INFO L225 Difference]: With dead ends: 112 [2021-08-27 04:42:45,373 INFO L226 Difference]: Without dead ends: 110 [2021-08-27 04:42:45,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1909, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 04:42:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-27 04:42:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-08-27 04:42:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 105 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2021-08-27 04:42:45,375 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 94 [2021-08-27 04:42:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:45,375 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2021-08-27 04:42:45,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2021-08-27 04:42:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-27 04:42:45,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:45,376 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:45,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:45,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:45,585 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:42:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash -699918494, now seen corresponding path program 14 times [2021-08-27 04:42:45,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:45,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357697364] [2021-08-27 04:42:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:45,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:46,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:46,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:46,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357697364] [2021-08-27 04:42:46,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357697364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:46,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775951000] [2021-08-27 04:42:46,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:46,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:46,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:46,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:42:46,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 04:42:46,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 21 [2021-08-27 04:42:49,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:42:49,240 INFO L388 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 33 treesize of output 33 [2021-08-27 04:42:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775951000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:49,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:49,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-08-27 04:42:49,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951837941] [2021-08-27 04:42:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 04:42:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 04:42:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:42:49,528 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 49 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:09,566 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2021-08-27 04:43:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-27 04:43:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 49 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-08-27 04:43:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:09,567 INFO L225 Difference]: With dead ends: 180 [2021-08-27 04:43:09,567 INFO L226 Difference]: Without dead ends: 123 [2021-08-27 04:43:09,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 8731.2ms TimeCoverageRelationStatistics Valid=508, Invalid=6972, Unknown=2, NotChecked=0, Total=7482 [2021-08-27 04:43:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-27 04:43:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-08-27 04:43:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-08-27 04:43:09,570 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 100 [2021-08-27 04:43:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:09,570 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-08-27 04:43:09,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 49 states have internal predecessors, (189), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-08-27 04:43:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-27 04:43:09,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:09,571 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:09,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:09,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 04:43:09,784 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrchrErr1REQUIRES_VIOLATION === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION (and 7 more)] === [2021-08-27 04:43:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:09,784 INFO L82 PathProgramCache]: Analyzing trace with hash -76462471, now seen corresponding path program 15 times [2021-08-27 04:43:09,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:09,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105115897] [2021-08-27 04:43:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:09,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:10,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:10,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:10,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105115897] [2021-08-27 04:43:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105115897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:10,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633308235] [2021-08-27 04:43:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:10,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:10,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:43:10,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:43:11,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-27 04:43:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:43:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:11,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 04:43:11,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 19 [2021-08-27 04:43:12,278 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:43:12,279 INFO L388 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 26 treesize of output 26 [2021-08-27 04:43:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-08-27 04:43:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633308235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:12,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:12,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 38 [2021-08-27 04:43:12,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046503923] [2021-08-27 04:43:12,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:43:12,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:12,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:43:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1325, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:43:12,531 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 35 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:17,257 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2021-08-27 04:43:17,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-27 04:43:17,257 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 35 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-08-27 04:43:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:17,258 INFO L225 Difference]: With dead ends: 186 [2021-08-27 04:43:17,258 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:43:17,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 4083.4ms TimeCoverageRelationStatistics Valid=1001, Invalid=9711, Unknown=0, NotChecked=0, Total=10712 [2021-08-27 04:43:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:43:17,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:43:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 04:43:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:43:17,260 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 110 [2021-08-27 04:43:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:17,260 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:43:17,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3947368421052633) internal successors, (129), 35 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:43:17,260 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr0REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr1REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr2REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr3REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr4REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrchrErr5REQUIRES_VIOLATION [2021-08-27 04:43:17,262 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:43:17,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:43:17,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:43:17,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:43:17,263 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:43:17,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:17,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:43:17,476 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:43:17,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:43:17 BoogieIcfgContainer [2021-08-27 04:43:17,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:43:17,478 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:43:17,478 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:43:17,478 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:43:17,478 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46" (3/4) ... [2021-08-27 04:43:17,497 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:43:17,501 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrchr [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:43:17,502 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:43:17,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-08-27 04:43:17,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-08-27 04:43:17,517 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:43:17,518 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:43:17,571 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:43:17,571 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:43:17,572 INFO L168 Benchmark]: Toolchain (without parser) took 91436.57 ms. Allocated memory was 52.4 MB in the beginning and 436.2 MB in the end (delta: 383.8 MB). Free memory was 29.0 MB in the beginning and 180.7 MB in the end (delta: -151.8 MB). Peak memory consumption was 231.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,572 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 52.4 MB. Free memory was 35.1 MB in the beginning and 35.0 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:43:17,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.81 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 41.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,572 INFO L168 Benchmark]: Boogie Preprocessor took 45.91 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 39.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,572 INFO L168 Benchmark]: RCFGBuilder took 390.60 ms. Allocated memory is still 62.9 MB. Free memory was 39.4 MB in the beginning and 36.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,573 INFO L168 Benchmark]: TraceAbstraction took 90574.28 ms. Allocated memory was 62.9 MB in the beginning and 436.2 MB in the end (delta: 373.3 MB). Free memory was 35.6 MB in the beginning and 183.9 MB in the end (delta: -148.2 MB). Peak memory consumption was 225.8 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,573 INFO L168 Benchmark]: Witness Printer took 93.65 ms. Allocated memory is still 436.2 MB. Free memory was 183.9 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:43:17,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 52.4 MB. Free memory was 35.1 MB in the beginning and 35.0 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.81 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 41.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.91 ms. Allocated memory is still 62.9 MB. Free memory was 41.9 MB in the beginning and 39.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 390.60 ms. Allocated memory is still 62.9 MB. Free memory was 39.4 MB in the beginning and 36.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 90574.28 ms. Allocated memory was 62.9 MB in the beginning and 436.2 MB in the end (delta: 373.3 MB). Free memory was 35.6 MB in the beginning and 183.9 MB in the end (delta: -148.2 MB). Peak memory consumption was 225.8 MB. Max. memory is 16.1 GB. * Witness Printer took 93.65 ms. Allocated memory is still 436.2 MB. Free memory was 183.9 MB in the beginning and 180.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 58 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 90543.2ms, OverallIterations: 27, TraceHistogramMax: 10, EmptinessCheckTime: 19.6ms, AutomataDifference: 54008.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 793 SDtfs, 2952 SDslu, 3579 SDs, 0 SdLazy, 20875 SolverSat, 510 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 19502.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1665 GetRequests, 871 SyntacticMatches, 9 SemanticMatches, 785 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6685 ImplicationChecksByTransitivity, 47748.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=26, InterpolantAutomatonStates: 450, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 76.2ms AutomataMinimizationTime, 27 MinimizatonAttempts, 77 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 161.9ms SsaConstructionTime, 813.9ms SatisfiabilityAnalysisTime, 26361.8ms InterpolantComputationTime, 2176 NumberOfCodeBlocks, 2153 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 2133 ConstructedInterpolants, 190 QuantifiedInterpolants, 20131 SizeOfPredicates, 117 NumberOfNonLiveVariables, 3506 ConjunctsInSsa, 614 ConjunctsInUnsatCore, 43 InterpolantComputations, 11 PerfectInterpolantSequences, 1220/4617 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:43:17,675 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...