./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cff20f2f9db1407772cc4ac909fa32770d83e71 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:42:15,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:42:15,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:42:15,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:42:15,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:42:15,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:42:15,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:42:15,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:42:15,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:42:15,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:42:15,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:42:15,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:42:15,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:42:15,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:42:15,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:42:15,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:42:15,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:42:15,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:42:15,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:42:15,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:42:15,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:42:15,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:42:15,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:42:15,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:42:16,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:42:16,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:42:16,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:42:16,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:42:16,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:42:16,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:42:16,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:42:16,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:42:16,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:42:16,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:42:16,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:42:16,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:42:16,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:42:16,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:42:16,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:42:16,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:42:16,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:42:16,198 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:42:16,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:42:16,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:42:16,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:42:16,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:42:16,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:42:16,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:42:16,230 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:42:16,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:42:16,230 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:42:16,230 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:42:16,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:42:16,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:42:16,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:42:16,231 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:42:16,231 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:42:16,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:42:16,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:42:16,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:42:16,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:42:16,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cff20f2f9db1407772cc4ac909fa32770d83e71 [2021-08-27 04:42:16,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:42:16,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:42:16,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:42:16,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:42:16,479 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:42:16,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-08-27 04:42:16,523 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3027b70/86b5a040553644cd8f8dbce89221c48a/FLAGd2daa921f [2021-08-27 04:42:16,945 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:42:16,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-08-27 04:42:16,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3027b70/86b5a040553644cd8f8dbce89221c48a/FLAGd2daa921f [2021-08-27 04:42:16,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d3027b70/86b5a040553644cd8f8dbce89221c48a [2021-08-27 04:42:16,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:42:16,968 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:42:16,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:42:16,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:42:16,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:42:16,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:42:16" (1/1) ... [2021-08-27 04:42:16,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c14f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:16, skipping insertion in model container [2021-08-27 04:42:16,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:42:16" (1/1) ... [2021-08-27 04:42:16,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:42:17,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:42:17,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:42:17,248 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:42:17,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:42:17,296 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:42:17,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17 WrapperNode [2021-08-27 04:42:17,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:42:17,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:42:17,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:42:17,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:42:17,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:42:17,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:42:17,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:42:17,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:42:17,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (1/1) ... [2021-08-27 04:42:17,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:42:17,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:17,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:42:17,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:42:17,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:42:17,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:42:17,403 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-08-27 04:42:17,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:42:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:42:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:42:17,403 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:42:17,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:42:17,405 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:42:17,406 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:42:17,407 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:42:17,408 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:42:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:42:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:42:17,409 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:42:17,410 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:42:17,411 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:42:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:42:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:42:17,412 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:42:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:42:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:42:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:42:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:42:17,415 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:42:17,416 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:42:17,417 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:42:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:42:17,419 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:42:17,419 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:42:17,419 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:42:17,419 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:42:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:42:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:42:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:42:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:42:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:42:17,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:42:17,846 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 04:42:17,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:17 BoogieIcfgContainer [2021-08-27 04:42:17,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:42:17,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:42:17,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:42:17,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:42:17,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:42:16" (1/3) ... [2021-08-27 04:42:17,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72361267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:42:17, skipping insertion in model container [2021-08-27 04:42:17,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:42:17" (2/3) ... [2021-08-27 04:42:17,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72361267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:42:17, skipping insertion in model container [2021-08-27 04:42:17,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:17" (3/3) ... [2021-08-27 04:42:17,853 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2021-08-27 04:42:17,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:42:17,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:42:17,882 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:42:17,886 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:42:17,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:42:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:42:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:17,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:17,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:17,901 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:17,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1363313202, now seen corresponding path program 1 times [2021-08-27 04:42:17,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:17,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45062640] [2021-08-27 04:42:17,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:17,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:18,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45062640] [2021-08-27 04:42:18,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45062640] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:18,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:18,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:18,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714250870] [2021-08-27 04:42:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:18,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:18,118 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 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 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) [2021-08-27 04:42:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:18,298 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-08-27 04:42:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:18,300 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 [2021-08-27 04:42:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:18,306 INFO L225 Difference]: With dead ends: 83 [2021-08-27 04:42:18,306 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:42:18,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:42:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-08-27 04:42:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-08-27 04:42:18,337 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-08-27 04:42:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:18,337 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-08-27 04:42:18,337 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) [2021-08-27 04:42:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-08-27 04:42:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:18,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:18,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:18,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:42:18,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:18,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:18,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1361466160, now seen corresponding path program 1 times [2021-08-27 04:42:18,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:18,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080150246] [2021-08-27 04:42:18,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:18,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:18,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080150246] [2021-08-27 04:42:18,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080150246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:18,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:18,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:42:18,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812439314] [2021-08-27 04:42:18,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:18,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:18,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:18,393 INFO L87 Difference]: Start difference. First operand 62 states and 70 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) [2021-08-27 04:42:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:18,474 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-08-27 04:42:18,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:18,475 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 [2021-08-27 04:42:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:18,478 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:42:18,478 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:42:18,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:42:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-27 04:42:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-08-27 04:42:18,494 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2021-08-27 04:42:18,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:18,494 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-08-27 04:42:18,494 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) [2021-08-27 04:42:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-08-27 04:42:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:42:18,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:18,495 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:18,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:42:18,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1361466159, now seen corresponding path program 1 times [2021-08-27 04:42:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:18,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403743084] [2021-08-27 04:42:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:18,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:18,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403743084] [2021-08-27 04:42:18,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403743084] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:18,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:18,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:18,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711258529] [2021-08-27 04:42:18,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:18,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:18,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:18,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:18,591 INFO L87 Difference]: Start difference. First operand 60 states and 68 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) [2021-08-27 04:42:18,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:18,753 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-27 04:42:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:18,753 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 [2021-08-27 04:42:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:18,754 INFO L225 Difference]: With dead ends: 80 [2021-08-27 04:42:18,754 INFO L226 Difference]: Without dead ends: 80 [2021-08-27 04:42:18,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-27 04:42:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-08-27 04:42:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-27 04:42:18,758 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-08-27 04:42:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:18,758 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-27 04:42:18,758 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) [2021-08-27 04:42:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-27 04:42:18,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:18,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:18,759 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:18,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:42:18,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:18,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:18,760 INFO L82 PathProgramCache]: Analyzing trace with hash -179010490, now seen corresponding path program 1 times [2021-08-27 04:42:18,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:18,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624087121] [2021-08-27 04:42:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:18,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:18,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624087121] [2021-08-27 04:42:18,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624087121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:18,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:18,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:18,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193760460] [2021-08-27 04:42:18,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:18,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:18,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:18,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:18,823 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:18,902 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-27 04:42:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:18,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:18,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:18,903 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:42:18,903 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 04:42:18,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:18,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 04:42:18,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-27 04:42:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-27 04:42:18,906 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-27 04:42:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:18,906 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-27 04:42:18,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-27 04:42:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:18,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:18,907 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:42:18,907 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:18,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:18,907 INFO L82 PathProgramCache]: Analyzing trace with hash -179010438, now seen corresponding path program 1 times [2021-08-27 04:42:18,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:18,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728806589] [2021-08-27 04:42:18,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:18,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:18,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:18,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728806589] [2021-08-27 04:42:18,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728806589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:18,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:18,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:18,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726338542] [2021-08-27 04:42:18,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:18,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:18,943 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:19,028 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-27 04:42:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:19,030 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:42:19,030 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:42:19,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:42:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:42:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-08-27 04:42:19,046 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-08-27 04:42:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-08-27 04:42:19,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-08-27 04:42:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:19,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:19,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:19,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:42:19,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash -121752136, now seen corresponding path program 1 times [2021-08-27 04:42:19,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:19,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594488711] [2021-08-27 04:42:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:19,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:19,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594488711] [2021-08-27 04:42:19,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594488711] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:19,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:19,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:42:19,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186673224] [2021-08-27 04:42:19,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:19,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:19,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:19,097 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:19,168 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-08-27 04:42:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:19,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:19,169 INFO L225 Difference]: With dead ends: 70 [2021-08-27 04:42:19,169 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:42:19,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:42:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 04:42:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:19,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-08-27 04:42:19,171 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-08-27 04:42:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-08-27 04:42:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-08-27 04:42:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:42:19,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:19,172 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:19,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:42:19,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:19,173 INFO L82 PathProgramCache]: Analyzing trace with hash -121752135, now seen corresponding path program 1 times [2021-08-27 04:42:19,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:19,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888699719] [2021-08-27 04:42:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:19,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:19,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888699719] [2021-08-27 04:42:19,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888699719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:19,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:19,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:19,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6139297] [2021-08-27 04:42:19,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:42:19,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:42:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:19,233 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:19,371 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-08-27 04:42:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:19,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-08-27 04:42:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:19,372 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:42:19,372 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:42:19,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:19,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:42:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:42:19,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-27 04:42:19,375 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-08-27 04:42:19,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:19,375 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-27 04:42:19,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,376 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-27 04:42:19,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:42:19,376 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:19,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:19,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:42:19,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1254357838, now seen corresponding path program 1 times [2021-08-27 04:42:19,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:19,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586806094] [2021-08-27 04:42:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:19,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:19,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586806094] [2021-08-27 04:42:19,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586806094] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:19,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:19,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641618907] [2021-08-27 04:42:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:19,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:19,415 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:19,492 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-08-27 04:42:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:42:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-08-27 04:42:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:19,493 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:42:19,493 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 04:42:19,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:19,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 04:42:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 04:42:19,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:19,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-08-27 04:42:19,495 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-08-27 04:42:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:19,495 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-08-27 04:42:19,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:19,496 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-08-27 04:42:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:42:19,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:19,496 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:19,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:42:19,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:19,497 INFO L82 PathProgramCache]: Analyzing trace with hash 498238100, now seen corresponding path program 1 times [2021-08-27 04:42:19,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:19,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717441227] [2021-08-27 04:42:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:19,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:19,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717441227] [2021-08-27 04:42:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717441227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:19,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661675201] [2021-08-27 04:42:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:19,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:19,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:19,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:42:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:42:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:19,812 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:42:19,812 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:42:19,825 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 15 treesize of output 13 [2021-08-27 04:42:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:19,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661675201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:19,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:19,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:42:19,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925812565] [2021-08-27 04:42:19,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:42:19,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:19,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:42:19,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:19,958 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:20,084 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-08-27 04:42:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:20,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 [2021-08-27 04:42:20,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:20,085 INFO L225 Difference]: With dead ends: 90 [2021-08-27 04:42:20,085 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 04:42:20,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 04:42:20,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-08-27 04:42:20,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-27 04:42:20,087 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-08-27 04:42:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:20,088 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-27 04:42:20,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,088 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-27 04:42:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:42:20,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:20,088 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:20,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 04:42:20,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:20,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1936156247, now seen corresponding path program 1 times [2021-08-27 04:42:20,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:20,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789095613] [2021-08-27 04:42:20,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:20,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:20,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:20,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789095613] [2021-08-27 04:42:20,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789095613] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:20,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:20,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:42:20,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58593509] [2021-08-27 04:42:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:42:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:42:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:42:20,352 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:20,436 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:42:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:42:20,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2021-08-27 04:42:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:20,437 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:20,438 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:42:20,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:42:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:42:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:42:20,440 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:42:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:20,440 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:42:20,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:42:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:42:20,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:20,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:20,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:42:20,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1936156248, now seen corresponding path program 1 times [2021-08-27 04:42:20,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:20,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554326806] [2021-08-27 04:42:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:20,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:20,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:20,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:20,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554326806] [2021-08-27 04:42:20,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554326806] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:20,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:20,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:42:20,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140534471] [2021-08-27 04:42:20,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:42:20,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:20,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:42:20,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:20,507 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:20,665 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-27 04:42:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:20,665 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2021-08-27 04:42:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:20,667 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:42:20,667 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:42:20,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:42:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:42:20,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-08-27 04:42:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-27 04:42:20,674 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-08-27 04:42:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:20,674 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-27 04:42:20,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-27 04:42:20,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:42:20,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:20,676 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:20,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:42:20,677 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1591790588, now seen corresponding path program 1 times [2021-08-27 04:42:20,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:20,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813860875] [2021-08-27 04:42:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:20,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:20,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:20,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813860875] [2021-08-27 04:42:20,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813860875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:20,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849788174] [2021-08-27 04:42:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:20,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:20,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:20,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:20,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:42:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:20,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:42:20,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:20,923 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:20,924 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:21,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849788174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:21,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:21,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:42:21,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77067720] [2021-08-27 04:42:21,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:42:21,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:42:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:42:21,026 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:21,143 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-27 04:42:21,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:21,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 17 [2021-08-27 04:42:21,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:21,145 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:42:21,145 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:42:21,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:42:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:42:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-08-27 04:42:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:42:21,148 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:42:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:21,148 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:42:21,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:42:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:42:21,152 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:21,152 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:21,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:21,370 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 [2021-08-27 04:42:21,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash 168377437, now seen corresponding path program 1 times [2021-08-27 04:42:21,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:21,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458476210] [2021-08-27 04:42:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:21,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:21,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458476210] [2021-08-27 04:42:21,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458476210] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:21,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:21,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:42:21,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419217848] [2021-08-27 04:42:21,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:42:21,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:42:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:42:21,411 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:21,544 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:42:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:42:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 21 [2021-08-27 04:42:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:21,549 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:21,549 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:42:21,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:42:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:42:21,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-08-27 04:42:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-08-27 04:42:21,551 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-08-27 04:42:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:21,551 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-08-27 04:42:21,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-08-27 04:42:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:42:21,552 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:21,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:21,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:42:21,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 168377438, now seen corresponding path program 1 times [2021-08-27 04:42:21,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:21,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850049246] [2021-08-27 04:42:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:21,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:21,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:21,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850049246] [2021-08-27 04:42:21,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850049246] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:21,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:21,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:42:21,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360811225] [2021-08-27 04:42:21,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:42:21,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:42:21,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:42:21,646 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:21,858 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-08-27 04:42:21,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:42:21,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 21 [2021-08-27 04:42:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:21,859 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:42:21,859 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:42:21,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:42:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:42:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-08-27 04:42:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:42:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-08-27 04:42:21,861 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-08-27 04:42:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:21,861 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-08-27 04:42:21,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-08-27 04:42:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:42:21,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:21,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:21,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:42:21,862 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1415217207, now seen corresponding path program 1 times [2021-08-27 04:42:21,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:21,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780821443] [2021-08-27 04:42:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:21,863 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:42:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:21,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:21,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780821443] [2021-08-27 04:42:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780821443] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:21,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:21,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134102931] [2021-08-27 04:42:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:42:21,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:42:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:21,904 INFO L87 Difference]: Start difference. First operand 68 states and 80 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) [2021-08-27 04:42:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:21,966 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-08-27 04:42:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:21,967 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 [2021-08-27 04:42:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:21,967 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:42:21,967 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:42:21,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:42:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:42:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:42:21,971 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-08-27 04:42:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:21,971 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:42:21,971 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) [2021-08-27 04:42:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:42:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 04:42:21,971 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:21,971 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:21,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:42:21,972 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash 808083893, now seen corresponding path program 1 times [2021-08-27 04:42:21,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:21,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808487852] [2021-08-27 04:42:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:21,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:21,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:21,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808487852] [2021-08-27 04:42:21,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808487852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:21,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:21,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:42:21,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683369259] [2021-08-27 04:42:21,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:42:21,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:42:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:42:21,997 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:22,044 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:42:22,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:42:22,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2021-08-27 04:42:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:22,045 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:42:22,045 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:42:22,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:42:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:42:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:42:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 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) [2021-08-27 04:42:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:42:22,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-08-27 04:42:22,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:22,047 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:42:22,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,047 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:42:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:42:22,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:22,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:22,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:42:22,048 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash -826319086, now seen corresponding path program 1 times [2021-08-27 04:42:22,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:22,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411334112] [2021-08-27 04:42:22,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:22,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:22,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:22,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411334112] [2021-08-27 04:42:22,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411334112] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:22,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:22,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:42:22,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898067776] [2021-08-27 04:42:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:42:22,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:42:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:42:22,153 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:22,310 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-08-27 04:42:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:42:22,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 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 27 [2021-08-27 04:42:22,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:22,311 INFO L225 Difference]: With dead ends: 77 [2021-08-27 04:42:22,311 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:42:22,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:42:22,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:42:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:42:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-08-27 04:42:22,312 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-08-27 04:42:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:22,312 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-08-27 04:42:22,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-08-27 04:42:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:42:22,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:22,313 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:22,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:42:22,313 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash -403617260, now seen corresponding path program 1 times [2021-08-27 04:42:22,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:22,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174587744] [2021-08-27 04:42:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:22,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:22,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:22,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174587744] [2021-08-27 04:42:22,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174587744] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:22,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:22,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:42:22,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587578428] [2021-08-27 04:42:22,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:42:22,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:42:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:42:22,437 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:22,592 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-27 04:42:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:42:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 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 27 [2021-08-27 04:42:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:22,593 INFO L225 Difference]: With dead ends: 80 [2021-08-27 04:42:22,593 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:42:22,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:42:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:42:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-27 04:42:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-08-27 04:42:22,595 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-08-27 04:42:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:22,595 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-08-27 04:42:22,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-08-27 04:42:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:42:22,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:22,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:22,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:42:22,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:22,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1843673559, now seen corresponding path program 1 times [2021-08-27 04:42:22,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:22,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280952776] [2021-08-27 04:42:22,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:22,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:22,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:22,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280952776] [2021-08-27 04:42:22,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280952776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:22,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:22,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:42:22,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241393442] [2021-08-27 04:42:22,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:42:22,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:42:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:42:22,690 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:22,905 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-08-27 04:42:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:42:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 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 31 [2021-08-27 04:42:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:22,907 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:42:22,907 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:42:22,907 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:42:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:42:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-08-27 04:42:22,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-08-27 04:42:22,910 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-08-27 04:42:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:22,910 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-08-27 04:42:22,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,910 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-08-27 04:42:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:42:22,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:22,912 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:22,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:42:22,912 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1709660053, now seen corresponding path program 1 times [2021-08-27 04:42:22,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:22,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620129442] [2021-08-27 04:42:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:22,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:23,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:23,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620129442] [2021-08-27 04:42:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620129442] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:23,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 04:42:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88813461] [2021-08-27 04:42:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:42:23,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:42:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:42:23,071 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:23,342 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-08-27 04:42:23,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:42:23,343 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 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 31 [2021-08-27 04:42:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:23,343 INFO L225 Difference]: With dead ends: 103 [2021-08-27 04:42:23,343 INFO L226 Difference]: Without dead ends: 103 [2021-08-27 04:42:23,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-27 04:42:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-08-27 04:42:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-08-27 04:42:23,345 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-08-27 04:42:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:23,345 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-08-27 04:42:23,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-08-27 04:42:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:42:23,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:23,346 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:23,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 04:42:23,346 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1499760060, now seen corresponding path program 1 times [2021-08-27 04:42:23,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:23,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193711256] [2021-08-27 04:42:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:23,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:23,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193711256] [2021-08-27 04:42:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193711256] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:42:23,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:42:23,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:42:23,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359147814] [2021-08-27 04:42:23,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:42:23,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:42:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:42:23,438 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:23,669 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-08-27 04:42:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:42:23,670 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 32 [2021-08-27 04:42:23,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:23,670 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:42:23,670 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 04:42:23,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:42:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 04:42:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-27 04:42:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-08-27 04:42:23,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-08-27 04:42:23,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:23,672 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-08-27 04:42:23,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:23,672 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-08-27 04:42:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:42:23,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:23,673 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:23,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 04:42:23,673 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash 385012248, now seen corresponding path program 1 times [2021-08-27 04:42:23,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:23,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847831076] [2021-08-27 04:42:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:23,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:23,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:23,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847831076] [2021-08-27 04:42:23,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847831076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:23,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625990855] [2021-08-27 04:42:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:23,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:23,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:23,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:42:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:42:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625990855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:24,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:24,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-27 04:42:24,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658622831] [2021-08-27 04:42:24,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:42:24,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:42:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:42:24,094 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:24,376 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2021-08-27 04:42:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:42:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 35 [2021-08-27 04:42:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:24,377 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:42:24,378 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:42:24,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:42:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:42:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-08-27 04:42:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-27 04:42:24,379 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2021-08-27 04:42:24,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:24,380 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-27 04:42:24,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,380 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-27 04:42:24,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 04:42:24,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:24,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:24,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:24,593 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1958963042, now seen corresponding path program 1 times [2021-08-27 04:42:24,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:24,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696615438] [2021-08-27 04:42:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:24,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:24,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:24,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696615438] [2021-08-27 04:42:24,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696615438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:24,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194347087] [2021-08-27 04:42:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:24,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:24,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:42:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:42:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:24,882 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:42:24,882 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:42:24,886 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 15 treesize of output 13 [2021-08-27 04:42:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194347087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:25,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:25,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-27 04:42:25,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922137331] [2021-08-27 04:42:25,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:42:25,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:42:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:42:25,106 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:25,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:25,365 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-08-27 04:42:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:42:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 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 [2021-08-27 04:42:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:25,366 INFO L225 Difference]: With dead ends: 122 [2021-08-27 04:42:25,367 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 04:42:25,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 04:42:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-08-27 04:42:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 81 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2021-08-27 04:42:25,369 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 38 [2021-08-27 04:42:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:25,370 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2021-08-27 04:42:25,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2021-08-27 04:42:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 04:42:25,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:25,371 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:25,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:25,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:25,585 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash 950813004, now seen corresponding path program 2 times [2021-08-27 04:42:25,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:25,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127283928] [2021-08-27 04:42:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:25,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:25,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:25,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:25,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127283928] [2021-08-27 04:42:25,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127283928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:25,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257556821] [2021-08-27 04:42:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:25,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:25,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:25,837 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:25,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:42:26,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:26,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:42:26,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:26,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:26,585 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 21 treesize of output 13 [2021-08-27 04:42:26,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:26,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257556821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:26,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:26,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-08-27 04:42:26,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047550280] [2021-08-27 04:42:26,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-27 04:42:26,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:26,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-27 04:42:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:42:26,631 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:27,208 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2021-08-27 04:42:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:42:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 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 41 [2021-08-27 04:42:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:27,209 INFO L225 Difference]: With dead ends: 134 [2021-08-27 04:42:27,209 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 04:42:27,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:42:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 04:42:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-08-27 04:42:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 117 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-08-27 04:42:27,211 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 41 [2021-08-27 04:42:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:27,211 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-08-27 04:42:27,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-08-27 04:42:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-27 04:42:27,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:27,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:27,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:27,425 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,SelfDestructingSolverStorable23 [2021-08-27 04:42:27,426 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2043759601, now seen corresponding path program 3 times [2021-08-27 04:42:27,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:27,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436717890] [2021-08-27 04:42:27,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:27,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:27,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:27,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:27,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:27,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436717890] [2021-08-27 04:42:27,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436717890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:27,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623497610] [2021-08-27 04:42:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:27,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:27,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:27,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:27,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:42:27,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:42:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 04:42:27,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623497610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:28,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-27 04:42:28,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023797159] [2021-08-27 04:42:28,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:42:28,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:42:28,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:42:28,031 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:28,531 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2021-08-27 04:42:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:42:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 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 45 [2021-08-27 04:42:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:28,533 INFO L225 Difference]: With dead ends: 170 [2021-08-27 04:42:28,533 INFO L226 Difference]: Without dead ends: 168 [2021-08-27 04:42:28,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-08-27 04:42:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2021-08-27 04:42:28,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 125 states have (on average 1.184) internal successors, (148), 129 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:28,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2021-08-27 04:42:28,536 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 45 [2021-08-27 04:42:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:28,536 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2021-08-27 04:42:28,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2021-08-27 04:42:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:42:28,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:28,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:28,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-27 04:42:28,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:28,756 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:28,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1906876194, now seen corresponding path program 2 times [2021-08-27 04:42:28,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:28,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279053797] [2021-08-27 04:42:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:28,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:28,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:28,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:28,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279053797] [2021-08-27 04:42:28,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279053797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:28,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31868965] [2021-08-27 04:42:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:28,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:28,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:29,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:42:29,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:29,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 04:42:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:29,241 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 10 treesize of output 8 [2021-08-27 04:42:29,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:29,455 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:42:29,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:42:29,927 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:42:29,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:42:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:29,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31868965] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:29,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:29,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-27 04:42:29,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544096563] [2021-08-27 04:42:29,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:42:29,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:42:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:42:29,967 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:30,699 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-08-27 04:42:30,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:42:30,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 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 51 [2021-08-27 04:42:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:30,700 INFO L225 Difference]: With dead ends: 214 [2021-08-27 04:42:30,700 INFO L226 Difference]: Without dead ends: 190 [2021-08-27 04:42:30,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-27 04:42:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2021-08-27 04:42:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 170 states have (on average 1.1705882352941177) internal successors, (199), 174 states have internal predecessors, (199), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2021-08-27 04:42:30,703 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 51 [2021-08-27 04:42:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:30,703 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2021-08-27 04:42:30,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 19 states have internal predecessors, (78), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2021-08-27 04:42:30,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:42:30,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:30,703 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:30,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-27 04:42:30,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:30,923 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1943965187, now seen corresponding path program 4 times [2021-08-27 04:42:30,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:30,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756093132] [2021-08-27 04:42:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:30,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:31,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:31,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756093132] [2021-08-27 04:42:31,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756093132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:31,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215016393] [2021-08-27 04:42:31,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:31,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:31,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:31,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:42:31,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:31,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:31,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:42:31,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:31,519 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:31,520 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:31,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:42:32,060 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-27 04:42:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-27 04:42:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:32,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215016393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:32,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:32,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2021-08-27 04:42:32,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325738395] [2021-08-27 04:42:32,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:42:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:42:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:32,075 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:33,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:33,519 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-08-27 04:42:33,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-27 04:42:33,520 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:42:33,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:33,521 INFO L225 Difference]: With dead ends: 284 [2021-08-27 04:42:33,521 INFO L226 Difference]: Without dead ends: 255 [2021-08-27 04:42:33,522 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 1206.3ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 04:42:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-27 04:42:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2021-08-27 04:42:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1531531531531531) internal successors, (256), 226 states have internal predecessors, (256), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2021-08-27 04:42:33,526 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 51 [2021-08-27 04:42:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:33,526 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2021-08-27 04:42:33,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.8) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2021-08-27 04:42:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:42:33,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:33,527 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:33,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:33,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:42:33,736 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:33,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2001819386, now seen corresponding path program 5 times [2021-08-27 04:42:33,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:33,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629268742] [2021-08-27 04:42:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:33,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:33,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:33,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629268742] [2021-08-27 04:42:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629268742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891521999] [2021-08-27 04:42:33,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:33,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:33,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:33,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:42:34,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:42:34,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:42:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:34,261 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:34,262 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:34,610 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:34,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891521999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:34,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:34,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 18 [2021-08-27 04:42:34,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151075063] [2021-08-27 04:42:34,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:42:34,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:42:34,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:42:34,612 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:35,238 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2021-08-27 04:42:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:42:35,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-08-27 04:42:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:35,239 INFO L225 Difference]: With dead ends: 298 [2021-08-27 04:42:35,239 INFO L226 Difference]: Without dead ends: 296 [2021-08-27 04:42:35,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:42:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-27 04:42:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2021-08-27 04:42:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 240 states have (on average 1.15) internal successors, (276), 244 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2021-08-27 04:42:35,244 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 55 [2021-08-27 04:42:35,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:35,244 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2021-08-27 04:42:35,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2021-08-27 04:42:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 04:42:35,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:35,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:35,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:35,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:42:35,449 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1800116063, now seen corresponding path program 3 times [2021-08-27 04:42:35,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:35,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255522321] [2021-08-27 04:42:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:35,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:35,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:35,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:35,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255522321] [2021-08-27 04:42:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255522321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:35,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659449132] [2021-08-27 04:42:35,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:35,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:35,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:35,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:35,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:42:35,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:42:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-27 04:42:35,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:36,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659449132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:36,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:36,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-08-27 04:42:36,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085108516] [2021-08-27 04:42:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:42:36,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:36,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:42:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:42:36,396 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:36,943 INFO L93 Difference]: Finished difference Result 403 states and 442 transitions. [2021-08-27 04:42:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:42:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 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 55 [2021-08-27 04:42:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:36,945 INFO L225 Difference]: With dead ends: 403 [2021-08-27 04:42:36,945 INFO L226 Difference]: Without dead ends: 403 [2021-08-27 04:42:36,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 333.9ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:42:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-08-27 04:42:36,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-08-27 04:42:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 310 states have (on average 1.1483870967741936) internal successors, (356), 314 states have internal predecessors, (356), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 363 transitions. [2021-08-27 04:42:36,952 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 363 transitions. Word has length 55 [2021-08-27 04:42:36,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:36,952 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 363 transitions. [2021-08-27 04:42:36,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 17 states have internal predecessors, (91), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 363 transitions. [2021-08-27 04:42:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-27 04:42:36,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:36,953 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:36,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:37,164 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,SelfDestructingSolverStorable28 [2021-08-27 04:42:37,164 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash -709186118, now seen corresponding path program 6 times [2021-08-27 04:42:37,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:37,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372565565] [2021-08-27 04:42:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:37,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:37,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:37,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372565565] [2021-08-27 04:42:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372565565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809177737] [2021-08-27 04:42:37,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:37,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:37,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:37,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:37,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:42:37,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:42:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 04:42:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:37,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:38,570 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-27 04:42:38,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 24 [2021-08-27 04:42:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:38,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809177737] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:38,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 35 [2021-08-27 04:42:38,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590860342] [2021-08-27 04:42:38,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:42:38,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:38,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:42:38,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:42:38,589 INFO L87 Difference]: Start difference. First operand 322 states and 363 transitions. Second operand has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:40,401 INFO L93 Difference]: Finished difference Result 508 states and 554 transitions. [2021-08-27 04:42:40,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 04:42:40,405 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 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 61 [2021-08-27 04:42:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:40,406 INFO L225 Difference]: With dead ends: 508 [2021-08-27 04:42:40,406 INFO L226 Difference]: Without dead ends: 470 [2021-08-27 04:42:40,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1165.9ms TimeCoverageRelationStatistics Valid=398, Invalid=3142, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 04:42:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-08-27 04:42:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 412. [2021-08-27 04:42:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 399 states have (on average 1.137844611528822) internal successors, (454), 403 states have internal predecessors, (454), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-08-27 04:42:40,413 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 61 [2021-08-27 04:42:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:40,413 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-08-27 04:42:40,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 32 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-08-27 04:42:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-27 04:42:40,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:40,414 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:40,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:40,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:40,619 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 68362493, now seen corresponding path program 7 times [2021-08-27 04:42:40,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:40,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013998362] [2021-08-27 04:42:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:40,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:40,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:40,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013998362] [2021-08-27 04:42:40,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013998362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:40,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69200581] [2021-08-27 04:42:40,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:40,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:40,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:40,809 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:40,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:42:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:42:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:41,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69200581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:41,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:41,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-27 04:42:41,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295316081] [2021-08-27 04:42:41,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:42:41,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:42:41,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:41,656 INFO L87 Difference]: Start difference. First operand 412 states and 462 transitions. Second operand has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:42,446 INFO L93 Difference]: Finished difference Result 517 states and 572 transitions. [2021-08-27 04:42:42,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:42:42,447 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 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 65 [2021-08-27 04:42:42,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:42,448 INFO L225 Difference]: With dead ends: 517 [2021-08-27 04:42:42,449 INFO L226 Difference]: Without dead ends: 515 [2021-08-27 04:42:42,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:42:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-27 04:42:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 436. [2021-08-27 04:42:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 423 states have (on average 1.1371158392434988) internal successors, (481), 427 states have internal predecessors, (481), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 489 transitions. [2021-08-27 04:42:42,457 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 489 transitions. Word has length 65 [2021-08-27 04:42:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:42,457 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 489 transitions. [2021-08-27 04:42:42,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 489 transitions. [2021-08-27 04:42:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-27 04:42:42,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:42,458 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:42,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:42,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:42,681 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:42,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1213534789, now seen corresponding path program 4 times [2021-08-27 04:42:42,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:42,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614953780] [2021-08-27 04:42:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:42,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:43,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:43,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614953780] [2021-08-27 04:42:43,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614953780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:43,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967940598] [2021-08-27 04:42:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:43,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:43,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:43,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:42:43,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:43,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-27 04:42:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:43,778 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 10 treesize of output 8 [2021-08-27 04:42:43,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 04:42:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:42:44,197 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-27 04:42:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-27 04:42:44,991 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:42:44,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-08-27 04:42:46,135 INFO L354 Elim1Store]: treesize reduction 58, result has 31.0 percent of original size [2021-08-27 04:42:46,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 57 [2021-08-27 04:42:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:42:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967940598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:46,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:46,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 46 [2021-08-27 04:42:46,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698223963] [2021-08-27 04:42:46,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-27 04:42:46,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-27 04:42:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1954, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:42:46,195 INFO L87 Difference]: Start difference. First operand 436 states and 489 transitions. Second operand has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:14,092 WARN L207 SmtUtils]: Spent 5.36 s on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-08-27 04:44:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:39,616 INFO L93 Difference]: Finished difference Result 798 states and 878 transitions. [2021-08-27 04:44:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-27 04:44:39,616 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 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 68 [2021-08-27 04:44:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:39,618 INFO L225 Difference]: With dead ends: 798 [2021-08-27 04:44:39,618 INFO L226 Difference]: Without dead ends: 610 [2021-08-27 04:44:39,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 107070.7ms TimeCoverageRelationStatistics Valid=980, Invalid=8915, Unknown=5, NotChecked=0, Total=9900 [2021-08-27 04:44:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-08-27 04:44:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 550. [2021-08-27 04:44:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 536 states have (on average 1.1492537313432836) internal successors, (616), 540 states have internal predecessors, (616), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 625 transitions. [2021-08-27 04:44:39,627 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 625 transitions. Word has length 68 [2021-08-27 04:44:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:39,627 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 625 transitions. [2021-08-27 04:44:39,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.772727272727273) internal successors, (122), 43 states have internal predecessors, (122), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 625 transitions. [2021-08-27 04:44:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 04:44:39,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:39,628 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:39,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:39,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-27 04:44:39,849 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1171066993, now seen corresponding path program 8 times [2021-08-27 04:44:39,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:39,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676366049] [2021-08-27 04:44:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:39,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:40,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:40,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676366049] [2021-08-27 04:44:40,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676366049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:40,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577165710] [2021-08-27 04:44:40,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:44:40,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:40,139 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:40,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:44:40,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:44:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:40,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-27 04:44:40,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:40,755 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:40,755 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:44:41,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:44:41,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:44:41,895 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 28 treesize of output 28 [2021-08-27 04:44:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:42,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577165710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:42,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:42,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-08-27 04:44:42,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958630694] [2021-08-27 04:44:42,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:44:42,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:42,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:44:42,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1460, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:44:42,151 INFO L87 Difference]: Start difference. First operand 550 states and 625 transitions. Second operand has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:45,342 INFO L93 Difference]: Finished difference Result 1060 states and 1161 transitions. [2021-08-27 04:44:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 04:44:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 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 71 [2021-08-27 04:44:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:45,345 INFO L225 Difference]: With dead ends: 1060 [2021-08-27 04:44:45,345 INFO L226 Difference]: Without dead ends: 910 [2021-08-27 04:44:45,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 2056.8ms TimeCoverageRelationStatistics Valid=472, Invalid=4930, Unknown=0, NotChecked=0, Total=5402 [2021-08-27 04:44:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-08-27 04:44:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 698. [2021-08-27 04:44:45,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 683 states have (on average 1.1420204978038067) internal successors, (780), 687 states have internal predecessors, (780), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 790 transitions. [2021-08-27 04:44:45,356 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 790 transitions. Word has length 71 [2021-08-27 04:44:45,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:45,357 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 790 transitions. [2021-08-27 04:44:45,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:45,357 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 790 transitions. [2021-08-27 04:44:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-27 04:44:45,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:45,358 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:45,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:45,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:45,573 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:45,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:45,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1329333336, now seen corresponding path program 5 times [2021-08-27 04:44:45,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:45,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095450263] [2021-08-27 04:44:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:45,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:45,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:45,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095450263] [2021-08-27 04:44:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095450263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:45,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326881363] [2021-08-27 04:44:45,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:44:45,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:45,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:45,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:44:46,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:44:46,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:46,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-27 04:44:46,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:46,441 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:44:46,441 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-27 04:44:46,443 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 15 treesize of output 13 [2021-08-27 04:44:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:46,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326881363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:46,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:46,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-27 04:44:46,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619739648] [2021-08-27 04:44:46,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:44:46,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:44:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:44:46,865 INFO L87 Difference]: Start difference. First operand 698 states and 790 transitions. Second operand has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:47,483 INFO L93 Difference]: Finished difference Result 984 states and 1095 transitions. [2021-08-27 04:44:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:44:47,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-08-27 04:44:47,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:47,486 INFO L225 Difference]: With dead ends: 984 [2021-08-27 04:44:47,486 INFO L226 Difference]: Without dead ends: 984 [2021-08-27 04:44:47,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:44:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-08-27 04:44:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 836. [2021-08-27 04:44:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 821 states have (on average 1.1388550548112057) internal successors, (935), 825 states have internal predecessors, (935), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 945 transitions. [2021-08-27 04:44:47,498 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 945 transitions. Word has length 72 [2021-08-27 04:44:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:47,498 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 945 transitions. [2021-08-27 04:44:47,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:47,499 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 945 transitions. [2021-08-27 04:44:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-27 04:44:47,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:47,500 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:47,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:47,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:47,713 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1811031592, now seen corresponding path program 9 times [2021-08-27 04:44:47,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:47,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916897560] [2021-08-27 04:44:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:47,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:47,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:47,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916897560] [2021-08-27 04:44:47,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916897560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:47,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612985026] [2021-08-27 04:44:47,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:44:47,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:47,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:47,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:47,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:44:48,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-27 04:44:48,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:48,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:44:48,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:48,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:44:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:44:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:49,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612985026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:49,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:49,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 35 [2021-08-27 04:44:49,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075705822] [2021-08-27 04:44:49,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:44:49,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:44:49,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:44:49,350 INFO L87 Difference]: Start difference. First operand 836 states and 945 transitions. Second operand has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:50,855 INFO L93 Difference]: Finished difference Result 1277 states and 1412 transitions. [2021-08-27 04:44:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 04:44:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 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 81 [2021-08-27 04:44:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:50,858 INFO L225 Difference]: With dead ends: 1277 [2021-08-27 04:44:50,858 INFO L226 Difference]: Without dead ends: 1098 [2021-08-27 04:44:50,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 04:44:50,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-08-27 04:44:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1003. [2021-08-27 04:44:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 987 states have (on average 1.1347517730496455) internal successors, (1120), 991 states have internal predecessors, (1120), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1131 transitions. [2021-08-27 04:44:50,872 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1131 transitions. Word has length 81 [2021-08-27 04:44:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1131 transitions. [2021-08-27 04:44:50,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1131 transitions. [2021-08-27 04:44:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:44:50,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:50,874 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:50,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:51,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-27 04:44:51,081 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash 10181099, now seen corresponding path program 10 times [2021-08-27 04:44:51,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:51,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053363071] [2021-08-27 04:44:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:51,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:51,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:51,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:51,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053363071] [2021-08-27 04:44:51,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053363071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:51,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257261674] [2021-08-27 04:44:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:44:51,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:51,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:51,380 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:51,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:44:52,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:44:52,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 04:44:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:52,202 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:52,202 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:44:52,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:44:53,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:44:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-27 04:44:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:53,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257261674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:53,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:53,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 36 [2021-08-27 04:44:53,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012215967] [2021-08-27 04:44:53,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-27 04:44:53,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-27 04:44:53,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:44:53,340 INFO L87 Difference]: Start difference. First operand 1003 states and 1131 transitions. Second operand has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:55,963 INFO L93 Difference]: Finished difference Result 1346 states and 1483 transitions. [2021-08-27 04:44:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 04:44:55,964 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 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 85 [2021-08-27 04:44:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:55,967 INFO L225 Difference]: With dead ends: 1346 [2021-08-27 04:44:55,967 INFO L226 Difference]: Without dead ends: 1344 [2021-08-27 04:44:55,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1368.2ms TimeCoverageRelationStatistics Valid=344, Invalid=3078, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 04:44:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-08-27 04:44:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1045. [2021-08-27 04:44:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1029 states have (on average 1.1350826044703595) internal successors, (1168), 1033 states have internal predecessors, (1168), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1179 transitions. [2021-08-27 04:44:55,980 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1179 transitions. Word has length 85 [2021-08-27 04:44:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:55,980 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1179 transitions. [2021-08-27 04:44:55,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1179 transitions. [2021-08-27 04:44:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-27 04:44:55,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:55,982 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:56,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:56,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:56,205 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1327649636, now seen corresponding path program 6 times [2021-08-27 04:44:56,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:56,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202348746] [2021-08-27 04:44:56,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:56,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:56,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:44:56,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:56,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202348746] [2021-08-27 04:44:56,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202348746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:56,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667639865] [2021-08-27 04:44:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:44:56,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:56,645 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:44:56,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:44:57,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:44:57,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:44:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:57,544 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 10 treesize of output 8 [2021-08-27 04:44:57,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:44:57,934 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:44:57,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:45:00,016 INFO L354 Elim1Store]: treesize reduction 79, result has 34.7 percent of original size [2021-08-27 04:45:00,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 72 [2021-08-27 04:45:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:00,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667639865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:00,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:45:00,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 44 [2021-08-27 04:45:00,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101727922] [2021-08-27 04:45:00,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:45:00,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:45:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:45:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1790, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:45:00,098 INFO L87 Difference]: Start difference. First operand 1045 states and 1179 transitions. Second operand has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:26,786 WARN L207 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-08-27 04:45:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:45:37,742 INFO L93 Difference]: Finished difference Result 2438 states and 2694 transitions. [2021-08-27 04:45:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-27 04:45:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 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 85 [2021-08-27 04:45:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:45:37,746 INFO L225 Difference]: With dead ends: 2438 [2021-08-27 04:45:37,746 INFO L226 Difference]: Without dead ends: 1575 [2021-08-27 04:45:37,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 36476.3ms TimeCoverageRelationStatistics Valid=694, Invalid=7678, Unknown=0, NotChecked=0, Total=8372 [2021-08-27 04:45:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-08-27 04:45:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1135. [2021-08-27 04:45:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1118 states have (on average 1.1368515205724508) internal successors, (1271), 1122 states have internal predecessors, (1271), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1283 transitions. [2021-08-27 04:45:37,761 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1283 transitions. Word has length 85 [2021-08-27 04:45:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:45:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1283 transitions. [2021-08-27 04:45:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.511627906976744) internal successors, (151), 41 states have internal predecessors, (151), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1283 transitions. [2021-08-27 04:45:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-27 04:45:37,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:45:37,762 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:45:37,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:45:37,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:37,977 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:45:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:45:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1030247833, now seen corresponding path program 7 times [2021-08-27 04:45:37,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:45:37,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60684169] [2021-08-27 04:45:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:45:37,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:45:37,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:45:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:38,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:45:38,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60684169] [2021-08-27 04:45:38,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60684169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:38,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653509894] [2021-08-27 04:45:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:45:38,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:45:38,153 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:45:38,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:45:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:39,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-27 04:45:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:45:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653509894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:39,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:45:39,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-27 04:45:39,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786352632] [2021-08-27 04:45:39,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:45:39,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:45:39,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:45:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:45:39,651 INFO L87 Difference]: Start difference. First operand 1135 states and 1283 transitions. Second operand has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:45:40,395 INFO L93 Difference]: Finished difference Result 1509 states and 1683 transitions. [2021-08-27 04:45:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:45:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-08-27 04:45:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:45:40,398 INFO L225 Difference]: With dead ends: 1509 [2021-08-27 04:45:40,398 INFO L226 Difference]: Without dead ends: 1509 [2021-08-27 04:45:40,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:45:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-08-27 04:45:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1316. [2021-08-27 04:45:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1299 states have (on average 1.134719014626636) internal successors, (1474), 1303 states have internal predecessors, (1474), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1486 transitions. [2021-08-27 04:45:40,413 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1486 transitions. Word has length 89 [2021-08-27 04:45:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:45:40,413 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 1486 transitions. [2021-08-27 04:45:40,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.478260869565218) internal successors, (126), 21 states have internal predecessors, (126), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1486 transitions. [2021-08-27 04:45:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-27 04:45:40,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:45:40,415 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:45:40,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:45:40,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:40,629 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:45:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:45:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1196842719, now seen corresponding path program 11 times [2021-08-27 04:45:40,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:45:40,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671599913] [2021-08-27 04:45:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:45:40,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:45:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:40,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:45:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:40,959 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:40,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:45:40,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671599913] [2021-08-27 04:45:40,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671599913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:40,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361560388] [2021-08-27 04:45:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:45:40,960 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:40,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:45:40,961 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:45:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:45:42,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-27 04:45:42,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:45:42,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 04:45:42,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:45:42,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:45:42,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:45:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:42,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361560388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:42,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:45:42,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 38 [2021-08-27 04:45:42,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791327329] [2021-08-27 04:45:42,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:45:42,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:45:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:45:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:45:42,643 INFO L87 Difference]: Start difference. First operand 1316 states and 1486 transitions. Second operand has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:45:44,446 INFO L93 Difference]: Finished difference Result 1985 states and 2198 transitions. [2021-08-27 04:45:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:45:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 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 91 [2021-08-27 04:45:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:45:44,450 INFO L225 Difference]: With dead ends: 1985 [2021-08-27 04:45:44,450 INFO L226 Difference]: Without dead ends: 1698 [2021-08-27 04:45:44,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 04:45:44,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-08-27 04:45:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1554. [2021-08-27 04:45:44,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1536 states have (on average 1.1321614583333333) internal successors, (1739), 1540 states have internal predecessors, (1739), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 1752 transitions. [2021-08-27 04:45:44,465 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 1752 transitions. Word has length 91 [2021-08-27 04:45:44,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:45:44,466 INFO L470 AbstractCegarLoop]: Abstraction has 1554 states and 1752 transitions. [2021-08-27 04:45:44,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 35 states have internal predecessors, (133), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 1752 transitions. [2021-08-27 04:45:44,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-27 04:45:44,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:45:44,467 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:45:44,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-27 04:45:44,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:45:44,681 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:45:44,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:45:44,681 INFO L82 PathProgramCache]: Analyzing trace with hash -695207198, now seen corresponding path program 12 times [2021-08-27 04:45:44,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:45:44,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251142271] [2021-08-27 04:45:44,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:45:44,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:45:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:45,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:45:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:45,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:45:45,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251142271] [2021-08-27 04:45:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251142271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:45,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506938307] [2021-08-27 04:45:45,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:45:45,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:45,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:45:45,041 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:45:45,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:45:46,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 04:45:46,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:45:46,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:45:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:45:46,837 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:46,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506938307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:46,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:45:46,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2021-08-27 04:45:46,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389369046] [2021-08-27 04:45:46,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 04:45:46,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:45:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 04:45:46,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 04:45:46,839 INFO L87 Difference]: Start difference. First operand 1554 states and 1752 transitions. Second operand has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:48,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:45:48,114 INFO L93 Difference]: Finished difference Result 1932 states and 2145 transitions. [2021-08-27 04:45:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 04:45:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 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 95 [2021-08-27 04:45:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:45:48,119 INFO L225 Difference]: With dead ends: 1932 [2021-08-27 04:45:48,119 INFO L226 Difference]: Without dead ends: 1930 [2021-08-27 04:45:48,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 776.0ms TimeCoverageRelationStatistics Valid=380, Invalid=2482, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 04:45:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-27 04:45:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1608. [2021-08-27 04:45:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1590 states have (on average 1.1327044025157234) internal successors, (1801), 1594 states have internal predecessors, (1801), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:48,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1814 transitions. [2021-08-27 04:45:48,137 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1814 transitions. Word has length 95 [2021-08-27 04:45:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:45:48,137 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 1814 transitions. [2021-08-27 04:45:48,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.45) internal successors, (178), 40 states have internal predecessors, (178), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1814 transitions. [2021-08-27 04:45:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-27 04:45:48,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:45:48,139 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:45:48,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:45:48,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 04:45:48,348 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:45:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:45:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash -982111594, now seen corresponding path program 13 times [2021-08-27 04:45:48,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:45:48,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708607159] [2021-08-27 04:45:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:45:48,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:45:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:48,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:45:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:48,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:45:48,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708607159] [2021-08-27 04:45:48,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708607159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:48,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470770020] [2021-08-27 04:45:48,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:45:48,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:48,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:45:48,699 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:45:48,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:45:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:45:49,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-27 04:45:49,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:45:50,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 04:45:51,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:45:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:45:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:45:51,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470770020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:45:51,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:45:51,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 51 [2021-08-27 04:45:51,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403151807] [2021-08-27 04:45:51,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 04:45:51,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:45:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 04:45:51,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:45:51,967 INFO L87 Difference]: Start difference. First operand 1608 states and 1814 transitions. Second operand has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:02,325 INFO L93 Difference]: Finished difference Result 2791 states and 3063 transitions. [2021-08-27 04:46:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-27 04:46:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 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 101 [2021-08-27 04:46:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:02,334 INFO L225 Difference]: With dead ends: 2791 [2021-08-27 04:46:02,334 INFO L226 Difference]: Without dead ends: 2463 [2021-08-27 04:46:02,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 3623.3ms TimeCoverageRelationStatistics Valid=572, Invalid=6736, Unknown=2, NotChecked=0, Total=7310 [2021-08-27 04:46:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-27 04:46:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1930. [2021-08-27 04:46:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1911 states have (on average 1.1318681318681318) internal successors, (2163), 1915 states have internal predecessors, (2163), 13 states have call successors, (13), 13 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2177 transitions. [2021-08-27 04:46:02,355 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2177 transitions. Word has length 101 [2021-08-27 04:46:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:02,355 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2177 transitions. [2021-08-27 04:46:02,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 3.877551020408163) internal successors, (190), 48 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2177 transitions. [2021-08-27 04:46:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-27 04:46:02,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:02,357 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:46:02,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-27 04:46:02,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:02,573 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:46:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:02,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1952660917, now seen corresponding path program 8 times [2021-08-27 04:46:02,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:02,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779189916] [2021-08-27 04:46:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:02,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:03,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:03,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779189916] [2021-08-27 04:46:03,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779189916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:03,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616794275] [2021-08-27 04:46:03,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:46:03,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:03,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:03,060 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:03,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:46:04,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:46:04,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:46:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-27 04:46:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:04,315 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 10 treesize of output 8 [2021-08-27 04:46:04,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:46:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-08-27 04:46:07,288 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-08-27 04:46:07,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 37 [2021-08-27 04:46:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:07,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616794275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:07,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:07,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-08-27 04:46:07,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421298307] [2021-08-27 04:46:07,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 04:46:07,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:07,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 04:46:07,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2522, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 04:46:07,334 INFO L87 Difference]: Start difference. First operand 1930 states and 2177 transitions. Second operand has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:11,005 INFO L93 Difference]: Finished difference Result 4603 states and 5160 transitions. [2021-08-27 04:46:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:46:11,006 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 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 102 [2021-08-27 04:46:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:11,015 INFO L225 Difference]: With dead ends: 4603 [2021-08-27 04:46:11,015 INFO L226 Difference]: Without dead ends: 4521 [2021-08-27 04:46:11,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2843.9ms TimeCoverageRelationStatistics Valid=349, Invalid=4763, Unknown=0, NotChecked=0, Total=5112 [2021-08-27 04:46:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-08-27 04:46:11,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 2973. [2021-08-27 04:46:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2947 states have (on average 1.1262300644723449) internal successors, (3319), 2951 states have internal predecessors, (3319), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3340 transitions. [2021-08-27 04:46:11,046 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3340 transitions. Word has length 102 [2021-08-27 04:46:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:11,046 INFO L470 AbstractCegarLoop]: Abstraction has 2973 states and 3340 transitions. [2021-08-27 04:46:11,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 49 states have internal predecessors, (190), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3340 transitions. [2021-08-27 04:46:11,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-27 04:46:11,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:11,050 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:46:11,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:11,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:11,265 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:46:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1692635886, now seen corresponding path program 9 times [2021-08-27 04:46:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:11,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747080344] [2021-08-27 04:46:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:11,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:11,483 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:11,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:11,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747080344] [2021-08-27 04:46:11,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747080344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:11,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97922084] [2021-08-27 04:46:11,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:46:11,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:11,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:11,484 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:11,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:46:12,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:46:12,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:46:12,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 04:46:12,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:12,961 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:46:12,962 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:46:12,968 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 10 treesize of output 8 [2021-08-27 04:46:13,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:46:13,243 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:46:13,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-08-27 04:46:16,925 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-08-27 04:46:16,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 83 [2021-08-27 04:46:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-08-27 04:46:17,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97922084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:17,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:17,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2021-08-27 04:46:17,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014003399] [2021-08-27 04:46:17,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:46:17,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:46:17,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:46:17,139 INFO L87 Difference]: Start difference. First operand 2973 states and 3340 transitions. Second operand has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:54,611 INFO L93 Difference]: Finished difference Result 4720 states and 5265 transitions. [2021-08-27 04:46:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-27 04:46:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 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 106 [2021-08-27 04:46:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:54,616 INFO L225 Difference]: With dead ends: 4720 [2021-08-27 04:46:54,616 INFO L226 Difference]: Without dead ends: 1638 [2021-08-27 04:46:54,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4321 ImplicationChecksByTransitivity, 37170.8ms TimeCoverageRelationStatistics Valid=1600, Invalid=13900, Unknown=0, NotChecked=0, Total=15500 [2021-08-27 04:46:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-08-27 04:46:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 788. [2021-08-27 04:46:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 777 states have (on average 1.1454311454311454) internal successors, (890), 779 states have internal predecessors, (890), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 898 transitions. [2021-08-27 04:46:54,625 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 898 transitions. Word has length 106 [2021-08-27 04:46:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:54,625 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 898 transitions. [2021-08-27 04:46:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 28 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 898 transitions. [2021-08-27 04:46:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-27 04:46:54,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:54,627 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:46:54,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:54,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:54,845 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:46:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1495136589, now seen corresponding path program 14 times [2021-08-27 04:46:54,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:54,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192565510] [2021-08-27 04:46:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:54,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:55,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:46:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:46:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:55,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:46:55,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192565510] [2021-08-27 04:46:55,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192565510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:55,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366850850] [2021-08-27 04:46:55,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:46:55,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:46:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:46:55,287 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:46:55,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:46:56,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:46:56,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:46:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:46:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:46:57,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:46:57,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 04:46:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:46:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366850850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:46:57,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:46:57,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 44 [2021-08-27 04:46:57,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656206123] [2021-08-27 04:46:57,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 04:46:57,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:46:57,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 04:46:57,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:46:57,673 INFO L87 Difference]: Start difference. First operand 788 states and 898 transitions. Second operand has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:46:59,725 INFO L93 Difference]: Finished difference Result 1578 states and 1742 transitions. [2021-08-27 04:46:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 04:46:59,729 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 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 111 [2021-08-27 04:46:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:46:59,731 INFO L225 Difference]: With dead ends: 1578 [2021-08-27 04:46:59,731 INFO L226 Difference]: Without dead ends: 823 [2021-08-27 04:46:59,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=276, Invalid=3384, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 04:46:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-08-27 04:46:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 808. [2021-08-27 04:46:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 797 states have (on average 1.1417816813048933) internal successors, (910), 799 states have internal predecessors, (910), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 918 transitions. [2021-08-27 04:46:59,737 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 918 transitions. Word has length 111 [2021-08-27 04:46:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:46:59,737 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 918 transitions. [2021-08-27 04:46:59,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.8333333333333335) internal successors, (161), 41 states have internal predecessors, (161), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:46:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 918 transitions. [2021-08-27 04:46:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-27 04:46:59,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:46:59,739 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:46:59,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-27 04:46:59,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-27 04:46:59,945 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:46:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:46:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1832678864, now seen corresponding path program 15 times [2021-08-27 04:46:59,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:46:59,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86554217] [2021-08-27 04:46:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:46:59,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:46:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:00,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:47:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:47:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:47:00,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:47:00,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86554217] [2021-08-27 04:47:00,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86554217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:00,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932281066] [2021-08-27 04:47:00,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:47:00,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:47:00,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:47:00,361 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:47:00,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:47:02,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-27 04:47:02,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:47:02,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-27 04:47:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:47:02,123 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:47:02,123 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:47:02,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-27 04:47:02,704 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-27 04:47:02,704 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 20 treesize of output 16 [2021-08-27 04:47:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-27 04:47:02,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932281066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:47:02,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:47:02,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2021-08-27 04:47:02,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759637349] [2021-08-27 04:47:02,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 04:47:02,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:47:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 04:47:02,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:47:02,781 INFO L87 Difference]: Start difference. First operand 808 states and 918 transitions. Second operand has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:47:06,361 INFO L93 Difference]: Finished difference Result 1120 states and 1208 transitions. [2021-08-27 04:47:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-27 04:47:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 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 115 [2021-08-27 04:47:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:47:06,362 INFO L225 Difference]: With dead ends: 1120 [2021-08-27 04:47:06,362 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:47:06,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2896.1ms TimeCoverageRelationStatistics Valid=1166, Invalid=8734, Unknown=0, NotChecked=0, Total=9900 [2021-08-27 04:47:06,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:47:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:47:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 04:47:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:47:06,363 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 115 [2021-08-27 04:47:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:47:06,363 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:47:06,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.181818181818182) internal successors, (138), 33 states have internal predecessors, (138), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:47:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:47:06,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:47:06,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-08-27 04:47:06,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-08-27 04:47:06,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-08-27 04:47:06,365 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr4REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr5REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr6REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr7REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr8REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr9REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:47:06,366 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:47:06,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 04:47:06,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-27 04:47:06,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:47:06,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:47:06 BoogieIcfgContainer [2021-08-27 04:47:06,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:47:06,572 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:47:06,572 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:47:06,572 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:47:06,572 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:42:17" (3/4) ... [2021-08-27 04:47:06,574 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:47:06,577 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:47:06,577 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:47:06,578 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:47:06,580 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-27 04:47:06,581 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 04:47:06,581 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 04:47:06,581 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:47:06,612 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:47:06,612 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:47:06,613 INFO L168 Benchmark]: Toolchain (without parser) took 289644.62 ms. Allocated memory was 65.0 MB in the beginning and 436.2 MB in the end (delta: 371.2 MB). Free memory was 44.2 MB in the beginning and 153.0 MB in the end (delta: -108.8 MB). Peak memory consumption was 262.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,613 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 49.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:47:06,614 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.00 ms. Allocated memory is still 65.0 MB. Free memory was 44.0 MB in the beginning and 41.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,614 INFO L168 Benchmark]: Boogie Preprocessor took 54.12 ms. Allocated memory is still 65.0 MB. Free memory was 41.3 MB in the beginning and 38.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,614 INFO L168 Benchmark]: RCFGBuilder took 492.95 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 38.9 MB in the beginning and 45.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,614 INFO L168 Benchmark]: TraceAbstraction took 288723.04 ms. Allocated memory was 81.8 MB in the beginning and 436.2 MB in the end (delta: 354.4 MB). Free memory was 45.3 MB in the beginning and 157.6 MB in the end (delta: -112.3 MB). Peak memory consumption was 241.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,614 INFO L168 Benchmark]: Witness Printer took 40.71 ms. Allocated memory is still 436.2 MB. Free memory was 156.6 MB in the beginning and 153.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:47:06,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 46.3 MB in the beginning and 46.3 MB in the end (delta: 49.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 328.00 ms. Allocated memory is still 65.0 MB. Free memory was 44.0 MB in the beginning and 41.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.12 ms. Allocated memory is still 65.0 MB. Free memory was 41.3 MB in the beginning and 38.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 492.95 ms. Allocated memory was 65.0 MB in the beginning and 81.8 MB in the end (delta: 16.8 MB). Free memory was 38.9 MB in the beginning and 45.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 15.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 288723.04 ms. Allocated memory was 81.8 MB in the beginning and 436.2 MB in the end (delta: 354.4 MB). Free memory was 45.3 MB in the beginning and 157.6 MB in the end (delta: -112.3 MB). Peak memory consumption was 241.9 MB. Max. memory is 16.1 GB. * Witness Printer took 40.71 ms. Allocated memory is still 436.2 MB. Free memory was 156.6 MB in the beginning and 153.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: 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, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 288689.0ms, OverallIterations: 45, TraceHistogramMax: 9, EmptinessCheckTime: 41.9ms, AutomataDifference: 230547.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2272 SDtfs, 10701 SDslu, 9356 SDs, 0 SdLazy, 60141 SolverSat, 1179 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 34885.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3047 GetRequests, 1562 SyntacticMatches, 21 SemanticMatches, 1464 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21345 ImplicationChecksByTransitivity, 203679.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=42, InterpolantAutomatonStates: 886, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 298.9ms AutomataMinimizationTime, 45 MinimizatonAttempts, 5389 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 287.7ms SsaConstructionTime, 1332.6ms SatisfiabilityAnalysisTime, 33745.8ms InterpolantComputationTime, 3973 NumberOfCodeBlocks, 3945 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 3902 ConstructedInterpolants, 387 QuantifiedInterpolants, 43382 SizeOfPredicates, 298 NumberOfNonLiveVariables, 6917 ConjunctsInSsa, 1069 ConjunctsInUnsatCore, 71 InterpolantComputations, 19 PerfectInterpolantSequences, 1359/5493 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 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:47:06,839 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 04:47:06,871 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 137 Received shutdown request...