./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/openbsd_cstrnlen-alloca-1.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 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d 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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-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:37:55,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:37:55,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:37:55,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:37:55,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:37:55,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:37:55,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:37:55,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:37:55,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:37:55,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:37:55,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:37:55,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:37:55,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:37:55,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:37:55,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:37:55,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:37:55,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:37:55,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:37:55,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:37:55,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:37:55,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:37:55,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:37:55,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:37:55,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:37:55,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:37:55,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:37:55,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:37:55,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:37:55,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:37:55,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:37:55,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:37:55,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:37:55,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:37:55,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:37:55,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:37:55,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:37:55,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:37:55,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:37:55,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:37:55,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:37:55,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:37:55,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:37:55,297 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:37:55,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:37:55,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:37:55,299 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:37:55,300 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:37:55,300 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:37:55,300 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:37:55,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:37:55,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:37:55,301 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:37:55,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:37:55,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:37:55,303 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:37:55,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:37:55,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:37:55,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:37:55,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:37:55,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:37:55,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:37:55,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:37:55,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:37:55,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:37:55,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:37:55,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac509d7b3f1ef173e01ced3ce9249a58ee1c04d [2021-08-30 16:37:55,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:37:55,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:37:55,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:37:55,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:37:55,573 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:37:55,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-08-30 16:37:55,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf7cd89f/f5f2ce78a7dd421485fe26c868f062ef/FLAGb5fc5eb57 [2021-08-30 16:37:56,059 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:37:56,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-08-30 16:37:56,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf7cd89f/f5f2ce78a7dd421485fe26c868f062ef/FLAGb5fc5eb57 [2021-08-30 16:37:56,355 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdf7cd89f/f5f2ce78a7dd421485fe26c868f062ef [2021-08-30 16:37:56,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:37:56,358 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:37:56,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:37:56,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:37:56,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:37:56,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d0fe57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56, skipping insertion in model container [2021-08-30 16:37:56,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:37:56,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:37:56,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:37:56,572 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:37:56,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:37:56,614 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:37:56,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56 WrapperNode [2021-08-30 16:37:56,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:37:56,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:37:56,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:37:56,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:37:56,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:37:56,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:37:56,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:37:56,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:37:56,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (1/1) ... [2021-08-30 16:37:56,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:37:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:56,684 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) [2021-08-30 16:37:56,698 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 [2021-08-30 16:37:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:37:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:37:56,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:37:56,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:37:56,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:37:56,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:37:56,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:37:56,720 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrnlen [2021-08-30 16:37:56,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:37:56,720 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:37:56,721 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:37:56,721 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:37:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:37:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:37:56,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:37:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:37:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:37:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:37:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:37:56,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:37:56,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:37:56,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:37:56,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:37:56,738 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:37:56,738 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:37:56,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:37:56,740 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:37:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:37:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:37:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:37:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:37:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:37:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:37:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:37:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:37:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:37:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:37:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:37:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:37:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:37:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:37:56,746 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:37:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:37:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:37:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:37:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:37:56,748 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:37:56,749 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:37:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:37:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:37:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:37:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:37:56,752 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure cstrnlen [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:37:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:37:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:37:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:37:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:37:56,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:37:56,942 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-30 16:37:56,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:56 BoogieIcfgContainer [2021-08-30 16:37:56,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:37:56,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:37:56,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:37:56,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:37:56,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:37:56" (1/3) ... [2021-08-30 16:37:56,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0cd743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:56, skipping insertion in model container [2021-08-30 16:37:56,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:37:56" (2/3) ... [2021-08-30 16:37:56,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0cd743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:37:56, skipping insertion in model container [2021-08-30 16:37:56,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:56" (3/3) ... [2021-08-30 16:37:56,948 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-08-30 16:37:56,951 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:37:56,951 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-08-30 16:37:56,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:37:56,980 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 [2021-08-30 16:37:56,980 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-30 16:37:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 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) [2021-08-30 16:37:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:37:56,994 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:56,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:56,995 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:56,998 INFO L82 PathProgramCache]: Analyzing trace with hash 787746653, now seen corresponding path program 1 times [2021-08-30 16:37:57,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266435983] [2021-08-30 16:37:57,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266435983] [2021-08-30 16:37:57,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266435983] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:37:57,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566768503] [2021-08-30 16:37:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-30 16:37:57,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-30 16:37:57,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 16:37:57,166 INFO L87 Difference]: Start difference. First operand has 37 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:57,227 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-08-30 16:37:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-30 16:37:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 11 [2021-08-30 16:37:57,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:57,234 INFO L225 Difference]: With dead ends: 37 [2021-08-30 16:37:57,235 INFO L226 Difference]: Without dead ends: 34 [2021-08-30 16:37:57,237 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.03ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-30 16:37:57,241 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:57,241 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 7 Invalid, 56 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 47.72ms Time] [2021-08-30 16:37:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-30 16:37:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-30 16:37:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 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) [2021-08-30 16:37:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-08-30 16:37:57,265 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 11 [2021-08-30 16:37:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:57,266 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-08-30 16:37:57,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-08-30 16:37:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:37:57,267 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:57,267 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:57,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:37:57,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 787746343, now seen corresponding path program 1 times [2021-08-30 16:37:57,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333157501] [2021-08-30 16:37:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333157501] [2021-08-30 16:37:57,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333157501] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:37:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104499905] [2021-08-30 16:37:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:37:57,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:37:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:37:57,363 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:57,438 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-08-30 16:37:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:37:57,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-08-30 16:37:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:57,439 INFO L225 Difference]: With dead ends: 32 [2021-08-30 16:37:57,440 INFO L226 Difference]: Without dead ends: 32 [2021-08-30 16:37:57,440 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.42ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:37:57,441 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.14ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:57,442 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 8 Invalid, 72 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 68.14ms Time] [2021-08-30 16:37:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-30 16:37:57,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-30 16:37:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-08-30 16:37:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-08-30 16:37:57,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-08-30 16:37:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:57,448 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-08-30 16:37:57,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-08-30 16:37:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:37:57,449 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:57,449 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:57,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:37:57,450 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr3REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:57,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:57,451 INFO L82 PathProgramCache]: Analyzing trace with hash 787746344, now seen corresponding path program 1 times [2021-08-30 16:37:57,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537541481] [2021-08-30 16:37:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537541481] [2021-08-30 16:37:57,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537541481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:37:57,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692381173] [2021-08-30 16:37:57,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:37:57,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:37:57,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:37:57,547 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:57,627 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-08-30 16:37:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:37:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-08-30 16:37:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:57,630 INFO L225 Difference]: With dead ends: 31 [2021-08-30 16:37:57,630 INFO L226 Difference]: Without dead ends: 31 [2021-08-30 16:37:57,636 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.70ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:37:57,641 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.87ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:57,643 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 13 Invalid, 84 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 53.87ms Time] [2021-08-30 16:37:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-30 16:37:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-30 16:37:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 25 states have internal predecessors, (30), 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) [2021-08-30 16:37:57,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-30 16:37:57,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 11 [2021-08-30 16:37:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:57,652 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-30 16:37:57,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,652 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-30 16:37:57,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:37:57,653 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:57,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:57,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:37:57,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:57,655 INFO L82 PathProgramCache]: Analyzing trace with hash 787746397, now seen corresponding path program 1 times [2021-08-30 16:37:57,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476933738] [2021-08-30 16:37:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476933738] [2021-08-30 16:37:57,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476933738] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:37:57,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472578920] [2021-08-30 16:37:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:37:57,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:37:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:37:57,739 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:57,804 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-08-30 16:37:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:37:57,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-08-30 16:37:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:57,806 INFO L225 Difference]: With dead ends: 39 [2021-08-30 16:37:57,807 INFO L226 Difference]: Without dead ends: 39 [2021-08-30 16:37:57,807 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.03ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:37:57,808 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.98ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.13ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:57,808 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 12 Invalid, 81 Unknown, 0 Unchecked, 0.98ms Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 53.13ms Time] [2021-08-30 16:37:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-30 16:37:57,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-08-30 16:37:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 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) [2021-08-30 16:37:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-08-30 16:37:57,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2021-08-30 16:37:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:57,814 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-08-30 16:37:57,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,814 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-08-30 16:37:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:37:57,814 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:57,814 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:57,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:37:57,815 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:57,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:57,815 INFO L82 PathProgramCache]: Analyzing trace with hash 789593439, now seen corresponding path program 1 times [2021-08-30 16:37:57,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59014882] [2021-08-30 16:37:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59014882] [2021-08-30 16:37:57,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59014882] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:37:57,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543946927] [2021-08-30 16:37:57,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:37:57,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:37:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:37:57,869 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:57,929 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-08-30 16:37:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:37:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 11 [2021-08-30 16:37:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:57,930 INFO L225 Difference]: With dead ends: 43 [2021-08-30 16:37:57,931 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 16:37:57,931 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.17ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:37:57,932 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.06ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.88ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:57,932 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 15 Invalid, 98 Unknown, 0 Unchecked, 1.06ms Time], IncrementalHoareTripleChecker [8 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 49.88ms Time] [2021-08-30 16:37:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 16:37:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2021-08-30 16:37:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 30 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) [2021-08-30 16:37:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-30 16:37:57,935 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-08-30 16:37:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:57,935 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-30 16:37:57,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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) [2021-08-30 16:37:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-30 16:37:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 16:37:57,936 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:57,936 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:57,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:37:57,937 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting cstrnlenErr0REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 849748688, now seen corresponding path program 1 times [2021-08-30 16:37:57,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:57,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138051653] [2021-08-30 16:37:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:57,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:57,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:57,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138051653] [2021-08-30 16:37:57,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138051653] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:57,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:57,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:37:57,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673562562] [2021-08-30 16:37:57,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:37:57,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:37:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:37:57,978 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-08-30 16:37:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:58,039 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-08-30 16:37:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:37:58,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-08-30 16:37:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:58,048 INFO L225 Difference]: With dead ends: 35 [2021-08-30 16:37:58,048 INFO L226 Difference]: Without dead ends: 35 [2021-08-30 16:37:58,048 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.51ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:37:58,049 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.17ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:58,049 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 14 Invalid, 108 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 44.17ms Time] [2021-08-30 16:37:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-30 16:37:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-30 16:37:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 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) [2021-08-30 16:37:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-30 16:37:58,052 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2021-08-30 16:37:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:58,052 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-30 16:37:58,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-08-30 16:37:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-30 16:37:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-30 16:37:58,053 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:58,053 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:58,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:37:58,053 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:58,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:58,053 INFO L82 PathProgramCache]: Analyzing trace with hash 849748689, now seen corresponding path program 1 times [2021-08-30 16:37:58,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:58,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052849121] [2021-08-30 16:37:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:58,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:58,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:58,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:58,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052849121] [2021-08-30 16:37:58,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052849121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:58,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:58,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:37:58,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351215352] [2021-08-30 16:37:58,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:37:58,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:37:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:37:58,123 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-30 16:37:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:58,233 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-08-30 16:37:58,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:37:58,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 16 [2021-08-30 16:37:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:58,235 INFO L225 Difference]: With dead ends: 44 [2021-08-30 16:37:58,235 INFO L226 Difference]: Without dead ends: 44 [2021-08-30 16:37:58,235 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.24ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:37:58,236 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.73ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:58,236 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 22 Invalid, 156 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 73.73ms Time] [2021-08-30 16:37:58,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-30 16:37:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2021-08-30 16:37:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-08-30 16:37:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-08-30 16:37:58,239 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 16 [2021-08-30 16:37:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:58,239 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-08-30 16:37:58,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2021-08-30 16:37:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-08-30 16:37:58,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:37:58,240 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:58,240 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:58,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 16:37:58,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2015068958, now seen corresponding path program 1 times [2021-08-30 16:37:58,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:58,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141352135] [2021-08-30 16:37:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:58,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:58,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:58,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:58,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141352135] [2021-08-30 16:37:58,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141352135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:58,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051458021] [2021-08-30 16:37:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:58,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:58,302 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) [2021-08-30 16:37:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:37:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:37:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:58,429 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 [2021-08-30 16:37:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:58,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051458021] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:58,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:58,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:37:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686961063] [2021-08-30 16:37:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:37:58,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:37:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:37:58,671 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-08-30 16:37:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:58,803 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-08-30 16:37:58,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:37:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15 [2021-08-30 16:37:58,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:58,804 INFO L225 Difference]: With dead ends: 50 [2021-08-30 16:37:58,804 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:37:58,805 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 106.55ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:37:58,805 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.24ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:58,805 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 22 Invalid, 217 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [15 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 95.24ms Time] [2021-08-30 16:37:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:37:58,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2021-08-30 16:37:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 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) [2021-08-30 16:37:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-08-30 16:37:58,808 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2021-08-30 16:37:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:58,809 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-08-30 16:37:58,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-08-30 16:37:58,809 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-08-30 16:37:58,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-30 16:37:58,809 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:58,810 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:58,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:59,027 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 [2021-08-30 16:37:59,027 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1695397446, now seen corresponding path program 1 times [2021-08-30 16:37:59,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:59,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694615306] [2021-08-30 16:37:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:59,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:59,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:59,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694615306] [2021-08-30 16:37:59,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694615306] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:59,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:59,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:37:59,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97225939] [2021-08-30 16:37:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:37:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:37:59,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:37:59,052 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-08-30 16:37:59,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:59,089 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-08-30 16:37:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:37:59,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 20 [2021-08-30 16:37:59,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:59,090 INFO L225 Difference]: With dead ends: 36 [2021-08-30 16:37:59,090 INFO L226 Difference]: Without dead ends: 36 [2021-08-30 16:37:59,090 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.58ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:37:59,091 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.50ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:59,091 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 70 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 30.50ms Time] [2021-08-30 16:37:59,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-30 16:37:59,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-30 16:37:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 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) [2021-08-30 16:37:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-30 16:37:59,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 20 [2021-08-30 16:37:59,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-30 16:37:59,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-08-30 16:37:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-30 16:37:59,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:37:59,094 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:59,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:59,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 16:37:59,095 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:59,095 INFO L82 PathProgramCache]: Analyzing trace with hash 964873536, now seen corresponding path program 1 times [2021-08-30 16:37:59,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:59,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874638607] [2021-08-30 16:37:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:59,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 16:37:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:59,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:59,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874638607] [2021-08-30 16:37:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874638607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:59,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:59,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:37:59,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292606026] [2021-08-30 16:37:59,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:37:59,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:37:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:37:59,153 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:37:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:59,266 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-30 16:37:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:37:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-08-30 16:37:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:59,267 INFO L225 Difference]: With dead ends: 58 [2021-08-30 16:37:59,267 INFO L226 Difference]: Without dead ends: 58 [2021-08-30 16:37:59,267 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.51ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:37:59,268 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:59,268 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 146 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 66.76ms Time] [2021-08-30 16:37:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-30 16:37:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-08-30 16:37:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-30 16:37:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-08-30 16:37:59,272 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 21 [2021-08-30 16:37:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:59,272 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-08-30 16:37:59,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:37:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-08-30 16:37:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:37:59,274 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:59,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:59,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:37:59,274 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash -46243714, now seen corresponding path program 1 times [2021-08-30 16:37:59,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:59,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859074246] [2021-08-30 16:37:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:59,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 16:37:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:59,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:59,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859074246] [2021-08-30 16:37:59,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859074246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:59,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:37:59,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:37:59,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736013016] [2021-08-30 16:37:59,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:37:59,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:37:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:37:59,357 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:37:59,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:59,469 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2021-08-30 16:37:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:37:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-08-30 16:37:59,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:59,470 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:37:59,470 INFO L226 Difference]: Without dead ends: 51 [2021-08-30 16:37:59,471 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 68.82ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:37:59,471 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.79ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:59,471 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 19 Invalid, 139 Unknown, 0 Unchecked, 0.79ms Time], IncrementalHoareTripleChecker [7 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 59.94ms Time] [2021-08-30 16:37:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-30 16:37:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-08-30 16:37:59,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 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) [2021-08-30 16:37:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-08-30 16:37:59,474 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-08-30 16:37:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-08-30 16:37:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:37:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-08-30 16:37:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 16:37:59,475 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:59,475 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:59,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 16:37:59,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:37:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1827219927, now seen corresponding path program 1 times [2021-08-30 16:37:59,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:59,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769281909] [2021-08-30 16:37:59,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:59,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:59,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:59,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769281909] [2021-08-30 16:37:59,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769281909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910395660] [2021-08-30 16:37:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:59,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:59,598 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) [2021-08-30 16:37:59,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:37:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-30 16:37:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:59,699 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 11 treesize of output 7 [2021-08-30 16:37:59,735 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 [2021-08-30 16:37:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:59,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:37:59,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910395660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:37:59,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:37:59,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-08-30 16:37:59,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341912944] [2021-08-30 16:37:59,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:37:59,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:59,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:37:59,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:37:59,754 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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) [2021-08-30 16:37:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:59,864 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-30 16:37:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:37:59,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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 22 [2021-08-30 16:37:59,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:59,865 INFO L225 Difference]: With dead ends: 50 [2021-08-30 16:37:59,865 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:37:59,865 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.20ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:37:59,866 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.60ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:59,866 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 209 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 73.60ms Time] [2021-08-30 16:37:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:37:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-08-30 16:37:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 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) [2021-08-30 16:37:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-08-30 16:37:59,868 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2021-08-30 16:37:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:59,869 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-08-30 16:37:59,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 2 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) [2021-08-30 16:37:59,869 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-08-30 16:37:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-30 16:37:59,869 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:59,870 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:59,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:00,088 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,SelfDestructingSolverStorable11 [2021-08-30 16:38:00,089 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1446679015, now seen corresponding path program 1 times [2021-08-30 16:38:00,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:00,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116624331] [2021-08-30 16:38:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:00,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:00,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:00,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116624331] [2021-08-30 16:38:00,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116624331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:00,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453244362] [2021-08-30 16:38:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:00,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:00,169 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) [2021-08-30 16:38:00,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:38:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-30 16:38:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:00,322 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 [2021-08-30 16:38:00,498 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-30 16:38:00,498 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 25 [2021-08-30 16:38:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:00,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:38:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453244362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:00,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:38:00,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 15 [2021-08-30 16:38:00,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987591177] [2021-08-30 16:38:00,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:38:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:38:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:38:00,520 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 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) [2021-08-30 16:38:00,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:00,611 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-08-30 16:38:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:38:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 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 22 [2021-08-30 16:38:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:00,612 INFO L225 Difference]: With dead ends: 62 [2021-08-30 16:38:00,612 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 16:38:00,612 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 148.26ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-30 16:38:00,612 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.95ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 52.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:00,613 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 241 Unknown, 0 Unchecked, 0.95ms Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 108 Unchecked, 52.55ms Time] [2021-08-30 16:38:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 16:38:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-08-30 16:38:00,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 16:38:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-30 16:38:00,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 22 [2021-08-30 16:38:00,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:00,616 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-30 16:38:00,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 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) [2021-08-30 16:38:00,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-30 16:38:00,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:38:00,617 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:00,617 INFO L513 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] [2021-08-30 16:38:00,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:00,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:00,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash -862082627, now seen corresponding path program 1 times [2021-08-30 16:38:00,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:00,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279107726] [2021-08-30 16:38:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:00,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-08-30 16:38:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:00,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:00,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279107726] [2021-08-30 16:38:00,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279107726] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:38:00,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:38:00,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:38:00,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078717104] [2021-08-30 16:38:00,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:38:00,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:38:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:00,881 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-30 16:38:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:00,922 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-08-30 16:38:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:38:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 23 [2021-08-30 16:38:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:00,923 INFO L225 Difference]: With dead ends: 54 [2021-08-30 16:38:00,923 INFO L226 Difference]: Without dead ends: 27 [2021-08-30 16:38:00,923 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.25ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:38:00,924 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.48ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:00,924 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 7 Invalid, 75 Unknown, 0 Unchecked, 0.48ms Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 37.57ms Time] [2021-08-30 16:38:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-30 16:38:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-30 16:38:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-08-30 16:38:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-08-30 16:38:00,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2021-08-30 16:38:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:00,927 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-08-30 16:38:00,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-30 16:38:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-08-30 16:38:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:38:00,927 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:00,927 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:00,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 16:38:00,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1736404348, now seen corresponding path program 1 times [2021-08-30 16:38:00,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:00,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094981836] [2021-08-30 16:38:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:00,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:01,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:01,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:01,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094981836] [2021-08-30 16:38:01,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094981836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:01,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314666026] [2021-08-30 16:38:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:01,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:01,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:01,032 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) [2021-08-30 16:38:01,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:38:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 16:38:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:01,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:01,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:38:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:01,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314666026] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:01,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:01,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2021-08-30 16:38:01,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938370133] [2021-08-30 16:38:01,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 16:38:01,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:01,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 16:38:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-30 16:38:01,401 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:01,557 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-08-30 16:38:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:38:01,558 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-08-30 16:38:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:01,558 INFO L225 Difference]: With dead ends: 39 [2021-08-30 16:38:01,558 INFO L226 Difference]: Without dead ends: 39 [2021-08-30 16:38:01,559 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 238.55ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:38:01,559 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 87 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 92.32ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:01,559 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 34 Invalid, 244 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [23 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 92.32ms Time] [2021-08-30 16:38:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-30 16:38:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-08-30 16:38:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2021-08-30 16:38:01,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-08-30 16:38:01,561 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2021-08-30 16:38:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:01,561 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-08-30 16:38:01,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-08-30 16:38:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 16:38:01,561 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:01,561 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:01,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:01,768 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 [2021-08-30 16:38:01,769 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:01,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:01,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2115859356, now seen corresponding path program 2 times [2021-08-30 16:38:01,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:01,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386106411] [2021-08-30 16:38:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:01,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:01,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 16:38:01,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386106411] [2021-08-30 16:38:01,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386106411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:01,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263845083] [2021-08-30 16:38:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:38:01,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:01,861 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) [2021-08-30 16:38:01,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:38:01,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:38:01,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-30 16:38:01,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:01,987 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 [2021-08-30 16:38:02,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:02,301 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 [2021-08-30 16:38:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:02,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:02,760 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 36 treesize of output 34 [2021-08-30 16:38:02,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-08-30 16:38:02,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:38:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:02,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263845083] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:02,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:02,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 28 [2021-08-30 16:38:02,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017844254] [2021-08-30 16:38:02,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-30 16:38:02,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:02,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-30 16:38:02,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:38:02,798 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 24 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:03,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:03,190 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-08-30 16:38:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-30 16:38:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 24 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-08-30 16:38:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:03,191 INFO L225 Difference]: With dead ends: 59 [2021-08-30 16:38:03,191 INFO L226 Difference]: Without dead ends: 42 [2021-08-30 16:38:03,191 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 636.48ms TimeCoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-08-30 16:38:03,192 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.61ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 124.91ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:03,192 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 59 Invalid, 458 Unknown, 0 Unchecked, 1.61ms Time], IncrementalHoareTripleChecker [14 Valid, 331 Invalid, 0 Unknown, 113 Unchecked, 124.91ms Time] [2021-08-30 16:38:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-30 16:38:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-08-30 16:38:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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) [2021-08-30 16:38:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-30 16:38:03,196 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2021-08-30 16:38:03,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:03,196 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-30 16:38:03,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 24 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-30 16:38:03,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-30 16:38:03,196 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:03,197 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:03,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-30 16:38:03,404 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 [2021-08-30 16:38:03,405 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash 942977846, now seen corresponding path program 1 times [2021-08-30 16:38:03,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:03,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125566295] [2021-08-30 16:38:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:03,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:03,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:03,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125566295] [2021-08-30 16:38:03,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125566295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:03,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944101743] [2021-08-30 16:38:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:03,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:03,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:03,510 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) [2021-08-30 16:38:03,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:38:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 16:38:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:03,667 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 [2021-08-30 16:38:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:03,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:03,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944101743] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:03,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:03,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2021-08-30 16:38:03,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830649817] [2021-08-30 16:38:03,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-30 16:38:03,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-30 16:38:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-30 16:38:03,920 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 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) [2021-08-30 16:38:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:04,088 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-08-30 16:38:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:38:04,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 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 38 [2021-08-30 16:38:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:04,088 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:38:04,089 INFO L226 Difference]: Without dead ends: 46 [2021-08-30 16:38:04,089 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 199.85ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-08-30 16:38:04,089 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.81ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:04,089 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 29 Invalid, 274 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [18 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 104.81ms Time] [2021-08-30 16:38:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-30 16:38:04,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-08-30 16:38:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 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) [2021-08-30 16:38:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-30 16:38:04,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2021-08-30 16:38:04,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:04,091 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-30 16:38:04,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.238095238095238) internal successors, (68), 19 states have internal predecessors, (68), 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) [2021-08-30 16:38:04,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-30 16:38:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-30 16:38:04,092 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:04,092 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:04,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:04,307 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 [2021-08-30 16:38:04,307 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1250412755, now seen corresponding path program 2 times [2021-08-30 16:38:04,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:04,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568421779] [2021-08-30 16:38:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:04,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:04,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:04,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:04,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568421779] [2021-08-30 16:38:04,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568421779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:04,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056707609] [2021-08-30 16:38:04,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:38:04,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:04,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:04,424 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) [2021-08-30 16:38:04,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 16:38:04,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:38:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:04,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 16:38:04,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:04,586 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 [2021-08-30 16:38:05,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:05,081 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 [2021-08-30 16:38:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:05,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:05,718 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 36 treesize of output 34 [2021-08-30 16:38:05,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-08-30 16:38:05,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:38:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:05,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056707609] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:05,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:05,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2021-08-30 16:38:05,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928253257] [2021-08-30 16:38:05,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 16:38:05,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:05,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 16:38:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:38:05,768 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 38 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:06,401 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-08-30 16:38:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 16:38:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-08-30 16:38:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:06,402 INFO L225 Difference]: With dead ends: 79 [2021-08-30 16:38:06,402 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 16:38:06,403 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1045.29ms TimeCoverageRelationStatistics Valid=263, Invalid=2599, Unknown=0, NotChecked=0, Total=2862 [2021-08-30 16:38:06,404 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.95ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 161.88ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:06,404 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 563 Unknown, 0 Unchecked, 1.95ms Time], IncrementalHoareTripleChecker [18 Valid, 427 Invalid, 0 Unknown, 118 Unchecked, 161.88ms Time] [2021-08-30 16:38:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 16:38:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-08-30 16:38:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2021-08-30 16:38:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-08-30 16:38:06,406 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 42 [2021-08-30 16:38:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:06,406 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-08-30 16:38:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-08-30 16:38:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-30 16:38:06,407 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:06,407 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:06,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:06,614 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 [2021-08-30 16:38:06,615 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash -873535480, now seen corresponding path program 3 times [2021-08-30 16:38:06,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:06,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514244101] [2021-08-30 16:38:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:06,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:06,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:06,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514244101] [2021-08-30 16:38:06,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514244101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:06,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734719450] [2021-08-30 16:38:06,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:38:06,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:06,843 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) [2021-08-30 16:38:06,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 16:38:07,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-30 16:38:07,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:38:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:07,164 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 [2021-08-30 16:38:07,379 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 [2021-08-30 16:38:07,387 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:07,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:07,461 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 13 [2021-08-30 16:38:07,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:38:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:07,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734719450] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:07,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:07,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 31 [2021-08-30 16:38:07,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565836668] [2021-08-30 16:38:07,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-30 16:38:07,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-30 16:38:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-30 16:38:07,551 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 31 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:07,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:07,975 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-08-30 16:38:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-30 16:38:07,975 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-08-30 16:38:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:07,976 INFO L225 Difference]: With dead ends: 86 [2021-08-30 16:38:07,976 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:38:07,977 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 529.28ms TimeCoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-30 16:38:07,977 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 80 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.05ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:07,977 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 67 Invalid, 796 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [15 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 228.05ms Time] [2021-08-30 16:38:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:38:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2021-08-30 16:38:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2021-08-30 16:38:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-30 16:38:07,979 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2021-08-30 16:38:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:07,979 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-30 16:38:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-30 16:38:07,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-30 16:38:07,980 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:07,980 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:07,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:08,189 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 [2021-08-30 16:38:08,190 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -330733851, now seen corresponding path program 4 times [2021-08-30 16:38:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:08,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660392704] [2021-08-30 16:38:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:08,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:08,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:08,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660392704] [2021-08-30 16:38:08,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660392704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:08,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742841795] [2021-08-30 16:38:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:38:08,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:08,383 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) [2021-08-30 16:38:08,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:38:08,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:38:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:38:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:08,519 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 [2021-08-30 16:38:08,671 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 [2021-08-30 16:38:09,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:09,052 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 [2021-08-30 16:38:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:09,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:09,855 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 29 treesize of output 27 [2021-08-30 16:38:09,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:38:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:10,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742841795] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:10,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:10,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2021-08-30 16:38:10,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399363208] [2021-08-30 16:38:10,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-30 16:38:10,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-30 16:38:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:38:10,420 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:11,436 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2021-08-30 16:38:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 16:38:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-08-30 16:38:11,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:11,437 INFO L225 Difference]: With dead ends: 72 [2021-08-30 16:38:11,437 INFO L226 Difference]: Without dead ends: 72 [2021-08-30 16:38:11,438 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1608.06ms TimeCoverageRelationStatistics Valid=431, Invalid=2991, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:38:11,438 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 204 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 327.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.45ms SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 387.70ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:11,438 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 59 Invalid, 1084 Unknown, 0 Unchecked, 3.45ms Time], IncrementalHoareTripleChecker [54 Valid, 947 Invalid, 0 Unknown, 83 Unchecked, 387.70ms Time] [2021-08-30 16:38:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-30 16:38:11,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2021-08-30 16:38:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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) [2021-08-30 16:38:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-08-30 16:38:11,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 56 [2021-08-30 16:38:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:11,440 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-08-30 16:38:11,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 3.475) internal successors, (139), 40 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-08-30 16:38:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-30 16:38:11,441 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:11,441 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:11,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:11,641 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 [2021-08-30 16:38:11,641 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:11,642 INFO L82 PathProgramCache]: Analyzing trace with hash -684495467, now seen corresponding path program 5 times [2021-08-30 16:38:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:11,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531584887] [2021-08-30 16:38:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:11,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:11,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:11,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:11,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531584887] [2021-08-30 16:38:11,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531584887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:11,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608063574] [2021-08-30 16:38:11,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:38:11,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:11,804 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) [2021-08-30 16:38:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 16:38:11,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-30 16:38:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-30 16:38:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:11,962 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 [2021-08-30 16:38:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 108 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:12,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 108 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:12,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608063574] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:12,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:12,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 38 [2021-08-30 16:38:12,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870235041] [2021-08-30 16:38:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 16:38:12,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 16:38:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:38:12,721 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 38 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:13,002 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-08-30 16:38:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:38:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-08-30 16:38:13,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:13,003 INFO L225 Difference]: With dead ends: 112 [2021-08-30 16:38:13,003 INFO L226 Difference]: Without dead ends: 76 [2021-08-30 16:38:13,003 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 537.60ms TimeCoverageRelationStatistics Valid=344, Invalid=1726, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:38:13,004 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.29ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:13,004 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 41 Invalid, 632 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [15 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 172.29ms Time] [2021-08-30 16:38:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-30 16:38:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-08-30 16:38:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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) [2021-08-30 16:38:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2021-08-30 16:38:13,006 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2021-08-30 16:38:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2021-08-30 16:38:13,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2021-08-30 16:38:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-30 16:38:13,006 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:13,006 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:13,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-30 16:38:13,207 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 [2021-08-30 16:38:13,207 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrnlenErr1REQUIRES_VIOLATION === [cstrnlenErr0REQUIRES_VIOLATION, cstrnlenErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 2 more)] === [2021-08-30 16:38:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:13,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1098289778, now seen corresponding path program 6 times [2021-08-30 16:38:13,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:13,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397679645] [2021-08-30 16:38:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:13,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:13,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:13,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:13,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397679645] [2021-08-30 16:38:13,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397679645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:13,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449628628] [2021-08-30 16:38:13,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:38:13,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:13,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:13,505 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) [2021-08-30 16:38:13,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 16:38:13,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-30 16:38:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:13,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-30 16:38:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:13,677 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 [2021-08-30 16:38:13,753 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 [2021-08-30 16:38:13,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:13,996 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 [2021-08-30 16:38:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:14,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:14,597 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 31 treesize of output 29 [2021-08-30 16:38:14,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-30 16:38:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:14,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449628628] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:14,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:14,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 37 [2021-08-30 16:38:14,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225670051] [2021-08-30 16:38:14,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-30 16:38:14,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-30 16:38:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1241, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 16:38:14,724 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 37 states, 34 states have (on average 3.264705882352941) internal successors, (111), 33 states have internal predecessors, (111), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:15,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:15,775 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-08-30 16:38:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:38:15,776 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 3.264705882352941) internal successors, (111), 33 states have internal predecessors, (111), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-08-30 16:38:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:15,776 INFO L225 Difference]: With dead ends: 117 [2021-08-30 16:38:15,776 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:38:15,777 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1355.20ms TimeCoverageRelationStatistics Valid=435, Invalid=5115, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 16:38:15,777 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 203.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:15,778 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 808 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [3 Valid, 665 Invalid, 0 Unknown, 140 Unchecked, 203.94ms Time] [2021-08-30 16:38:15,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:38:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:38:15,778 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) [2021-08-30 16:38:15,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:38:15,778 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2021-08-30 16:38:15,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:15,778 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:38:15,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 3.264705882352941) internal successors, (111), 33 states have internal predecessors, (111), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:15,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:38:15,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:38:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-08-30 16:38:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrnlenErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-08-30 16:38:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (4 of 7 remaining) [2021-08-30 16:38:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (3 of 7 remaining) [2021-08-30 16:38:15,783 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (2 of 7 remaining) [2021-08-30 16:38:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (1 of 7 remaining) [2021-08-30 16:38:15,784 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-08-30 16:38:15,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:15,988 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 [2021-08-30 16:38:15,992 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:38:15,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:38:15 BoogieIcfgContainer [2021-08-30 16:38:15,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:38:15,994 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:38:15,994 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:38:15,994 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:38:15,995 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:37:56" (3/4) ... [2021-08-30 16:38:15,996 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:38:16,000 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:38:16,000 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrnlen [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:38:16,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:38:16,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-08-30 16:38:16,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-30 16:38:16,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:38:16,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:38:16,027 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:38:16,028 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:38:16,029 INFO L158 Benchmark]: Toolchain (without parser) took 19669.75ms. Allocated memory was 77.6MB in the beginning and 209.7MB in the end (delta: 132.1MB). Free memory was 58.4MB in the beginning and 126.0MB in the end (delta: -67.6MB). Peak memory consumption was 67.4MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,029 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:38:16,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.24ms. Allocated memory is still 77.6MB. Free memory was 58.2MB in the beginning and 43.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,029 INFO L158 Benchmark]: Boogie Preprocessor took 46.69ms. Allocated memory is still 77.6MB. Free memory was 43.1MB in the beginning and 40.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,030 INFO L158 Benchmark]: RCFGBuilder took 280.68ms. Allocated memory is still 77.6MB. Free memory was 40.6MB in the beginning and 46.0MB in the end (delta: -5.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,030 INFO L158 Benchmark]: TraceAbstraction took 19049.73ms. Allocated memory was 77.6MB in the beginning and 209.7MB in the end (delta: 132.1MB). Free memory was 45.6MB in the beginning and 129.2MB in the end (delta: -83.6MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,030 INFO L158 Benchmark]: Witness Printer took 33.66ms. Allocated memory is still 209.7MB. Free memory was 129.2MB in the beginning and 126.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 16:38:16,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 77.6MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.24ms. Allocated memory is still 77.6MB. Free memory was 58.2MB in the beginning and 43.1MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.69ms. Allocated memory is still 77.6MB. Free memory was 43.1MB in the beginning and 40.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 280.68ms. Allocated memory is still 77.6MB. Free memory was 40.6MB in the beginning and 46.0MB in the end (delta: -5.4MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * TraceAbstraction took 19049.73ms. Allocated memory was 77.6MB in the beginning and 209.7MB in the end (delta: 132.1MB). Free memory was 45.6MB in the beginning and 129.2MB in the end (delta: -83.6MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. * Witness Printer took 33.66ms. Allocated memory is still 209.7MB. Free memory was 129.2MB in the beginning and 126.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: 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, 52 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 19017.30ms, OverallIterations: 22, TraceHistogramMax: 7, EmptinessCheckTime: 19.18ms, AutomataDifference: 5400.24ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 6.07ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1115 SdHoareTripleChecker+Valid, 2282.69ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1103 mSDsluCounter, 680 SdHoareTripleChecker+Invalid, 1865.53ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 562 IncrementalHoareTripleChecker+Unchecked, 1401 mSDsCounter, 242 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5807 IncrementalHoareTripleChecker+Invalid, 6611 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 242 mSolverCounterUnsat, 104 mSDtfsCounter, 5807 mSolverCounterSat, 31.98ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1205 GetRequests, 732 SyntacticMatches, 14 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2854 ImplicationChecksByTransitivity, 6827.60ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=21, InterpolantAutomatonStates: 265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 68.06ms AutomataMinimizationTime, 22 MinimizatonAttempts, 94 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 84.45ms SsaConstructionTime, 623.60ms SatisfiabilityAnalysisTime, 9392.60ms InterpolantComputationTime, 1062 NumberOfCodeBlocks, 1052 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1421 ConstructedInterpolants, 117 QuantifiedInterpolants, 12911 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1571 ConjunctsInSsa, 311 ConjunctsInUnsatCore, 42 InterpolantComputations, 13 PerfectInterpolantSequences, 758/1538 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:38:16,063 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...