./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_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/openbsd_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 b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 04:58:55,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:58:55,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:58:55,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:58:55,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:58:55,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:58:55,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:58:55,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:58:55,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:58:55,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:58:55,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:58:55,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:58:55,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:58:55,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:58:55,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:58:55,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:58:55,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:58:55,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:58:55,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:58:55,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:58:55,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:58:55,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:58:55,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:58:55,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:58:55,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:58:55,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:58:55,151 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:58:55,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:58:55,153 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:58:55,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:58:55,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:58:55,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:58:55,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:58:55,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:58:55,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:58:55,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:58:55,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:58:55,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:58:55,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:58:55,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:58:55,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:58:55,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:58:55,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:58:55,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:58:55,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:58:55,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:58:55,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:58:55,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:58:55,204 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:58:55,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:58:55,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:58:55,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:58:55,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:58:55,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:58:55,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:58:55,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:58:55,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:58:55,206 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:58:55,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:58:55,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:58:55,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:58:55,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:58:55,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:58:55,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:58:55,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:58:55,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:58:55,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:58:55,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:58:55,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:58:55,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:58:55,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:58:55,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d [2021-08-27 04:58:55,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:58:55,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:58:55,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:58:55,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:58:55,519 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:58:55,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-08-27 04:58:55,582 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0fc094/33b1bb2fa22f4399b2fa773ee7dab86c/FLAGe094c41f6 [2021-08-27 04:58:56,092 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:58:56,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-08-27 04:58:56,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0fc094/33b1bb2fa22f4399b2fa773ee7dab86c/FLAGe094c41f6 [2021-08-27 04:58:56,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe0fc094/33b1bb2fa22f4399b2fa773ee7dab86c [2021-08-27 04:58:56,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:58:56,433 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:58:56,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:58:56,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:58:56,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:58:56,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344f307c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56, skipping insertion in model container [2021-08-27 04:58:56,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:58:56,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:58:56,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:58:56,713 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:58:56,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:58:56,769 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:58:56,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56 WrapperNode [2021-08-27 04:58:56,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:58:56,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:58:56,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:58:56,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:58:56,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:58:56,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:58:56,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:58:56,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:58:56,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (1/1) ... [2021-08-27 04:58:56,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:58:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:56,850 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 04:58:56,856 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 04:58:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:58:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:58:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:58:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:58:56,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:58:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:58:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:58:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-08-27 04:58:56,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:58:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:58:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:58:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:58:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:58:56,898 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:58:56,899 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:58:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:58:56,901 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:58:56,902 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:58:56,903 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:58:56,904 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:58:56,905 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:58:56,906 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:58:56,907 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:58:56,908 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:58:56,909 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:58:56,910 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:58:56,911 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:58:56,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:58:57,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:58:57,332 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 04:58:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:57 BoogieIcfgContainer [2021-08-27 04:58:57,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:58:57,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:58:57,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:58:57,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:58:57,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:58:56" (1/3) ... [2021-08-27 04:58:57,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477980e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:58:57, skipping insertion in model container [2021-08-27 04:58:57,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:58:56" (2/3) ... [2021-08-27 04:58:57,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477980e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:58:57, skipping insertion in model container [2021-08-27 04:58:57,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:57" (3/3) ... [2021-08-27 04:58:57,340 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-08-27 04:58:57,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:58:57,344 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-08-27 04:58:57,376 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:58:57,381 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 04:58:57,381 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-08-27 04:58:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 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 04:58:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:57,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:57,398 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:57,399 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603009, now seen corresponding path program 1 times [2021-08-27 04:58:57,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:57,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467701771] [2021-08-27 04:58:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:57,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,565 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 04:58:57,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:57,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467701771] [2021-08-27 04:58:57,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467701771] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:57,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:57,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:58:57,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107166164] [2021-08-27 04:58:57,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:58:57,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:58:57,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:57,587 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 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 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 04:58:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:57,684 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-08-27 04:58:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:58:57,686 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 04:58:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:57,692 INFO L225 Difference]: With dead ends: 50 [2021-08-27 04:58:57,692 INFO L226 Difference]: Without dead ends: 47 [2021-08-27 04:58:57,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-27 04:58:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-08-27 04:58:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 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 04:58:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-08-27 04:58:57,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 11 [2021-08-27 04:58:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:57,720 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-08-27 04:58:57,720 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 04:58:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-08-27 04:58:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:58:57,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:57,721 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:57,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:58:57,722 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603008, now seen corresponding path program 1 times [2021-08-27 04:58:57,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:57,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150447776] [2021-08-27 04:58:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:57,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:57,854 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 04:58:57,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:57,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150447776] [2021-08-27 04:58:57,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150447776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:57,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:57,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:58:57,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252399007] [2021-08-27 04:58:57,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:58:57,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:58:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:57,859 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:57,994 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-08-27 04:58:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:58:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:57,996 INFO L225 Difference]: With dead ends: 51 [2021-08-27 04:58:57,996 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 04:58:57,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 04:58:58,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-08-27 04:58:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 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 04:58:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-08-27 04:58:58,009 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2021-08-27 04:58:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:58,010 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-08-27 04:58:58,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-08-27 04:58:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:58:58,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:58,011 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:58,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:58:58,011 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:58,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:58,012 INFO L82 PathProgramCache]: Analyzing trace with hash 973924227, now seen corresponding path program 1 times [2021-08-27 04:58:58,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:58,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629218838] [2021-08-27 04:58:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:58,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,122 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 04:58:58,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:58,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629218838] [2021-08-27 04:58:58,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629218838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:58,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973102913] [2021-08-27 04:58:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:58,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:58,132 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 04:58:58,161 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 04:58:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 04:58:58,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:58:58,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973102913] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:58,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:58:58,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-08-27 04:58:58,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888495122] [2021-08-27 04:58:58,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:58:58,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:58,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:58:58,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:58,400 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:58,426 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-08-27 04:58:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:58:58,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 04:58:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:58,429 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:58:58,429 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:58:58,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:58:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-08-27 04:58:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 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 04:58:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-27 04:58:58,436 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 15 [2021-08-27 04:58:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:58,437 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-27 04:58:58,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:58:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-27 04:58:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:58:58,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:58,438 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:58:58,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:58:58,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:58,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:58,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1653982597, now seen corresponding path program 1 times [2021-08-27 04:58:58,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:58,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749603441] [2021-08-27 04:58:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:58,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,791 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 04:58:58,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:58,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749603441] [2021-08-27 04:58:58,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749603441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636321827] [2021-08-27 04:58:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:58,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:58:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:58:58,793 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 04:58:58,795 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 04:58:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:58:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:58:59,014 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:58:59,015 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 04:58:59,021 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 04:58:59,122 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 04:58:59,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636321827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:58:59,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:58:59,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:58:59,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63300044] [2021-08-27 04:58:59,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:58:59,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:58:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:59,124 INFO L87 Difference]: Start difference. First operand 56 states and 63 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 04:58:59,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:59,283 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-08-27 04:58:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:59,283 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 04:58:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:59,284 INFO L225 Difference]: With dead ends: 57 [2021-08-27 04:58:59,284 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 04:58:59,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 04:58:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-08-27 04:58:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 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 04:58:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-08-27 04:58:59,289 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-08-27 04:58:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-08-27 04:58:59,289 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 04:58:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-08-27 04:58:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:58:59,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:59,290 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 04:58:59,316 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 04:58:59,508 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,SelfDestructingSolverStorable3 [2021-08-27 04:58:59,508 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash -361738470, now seen corresponding path program 1 times [2021-08-27 04:58:59,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:59,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161298381] [2021-08-27 04:58:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:59,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,554 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 04:58:59,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:59,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161298381] [2021-08-27 04:58:59,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161298381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:59,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:59,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:58:59,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599023668] [2021-08-27 04:58:59,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:58:59,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:59,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:58:59,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:58:59,556 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 04:58:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:59,646 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-08-27 04:58:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-08-27 04:58:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:59,648 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:58:59,648 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:58:59,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:58:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:58:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-08-27 04:58:59,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 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 04:58:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-27 04:58:59,652 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-08-27 04:58:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-27 04:58:59,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 04:58:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-27 04:58:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:58:59,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:59,653 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 04:58:59,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:58:59,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:59,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash -361738418, now seen corresponding path program 1 times [2021-08-27 04:58:59,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:59,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273027812] [2021-08-27 04:58:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:59,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,700 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 04:58:59,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:59,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273027812] [2021-08-27 04:58:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273027812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:59,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:58:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764773037] [2021-08-27 04:58:59,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:58:59,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:59,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:58:59,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:59,702 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:58:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:59,768 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-08-27 04:58:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:58:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 17 [2021-08-27 04:58:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:59,769 INFO L225 Difference]: With dead ends: 53 [2021-08-27 04:58:59,769 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 04:58:59,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:58:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 04:58:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-27 04:58:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 47 states have internal predecessors, (55), 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 04:58:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-08-27 04:58:59,773 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-08-27 04:58:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:59,773 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-08-27 04:58:59,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 04:58:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-08-27 04:58:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:58:59,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:59,774 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 04:58:59,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:58:59,774 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:59,775 INFO L82 PathProgramCache]: Analyzing trace with hash -361738417, now seen corresponding path program 1 times [2021-08-27 04:58:59,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:59,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075678154] [2021-08-27 04:58:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:59,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:58:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:58:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:58:59,870 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 04:58:59,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:58:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075678154] [2021-08-27 04:58:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075678154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:58:59,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:58:59,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:58:59,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826534352] [2021-08-27 04:58:59,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:58:59,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:58:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:58:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:58:59,872 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 04:58:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:58:59,973 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-27 04:58:59,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:58:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 17 [2021-08-27 04:58:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:58:59,975 INFO L225 Difference]: With dead ends: 55 [2021-08-27 04:58:59,976 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 04:58:59,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:58:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 04:58:59,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-08-27 04:58:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 47 states have internal predecessors, (55), 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 04:58:59,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-08-27 04:58:59,988 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-08-27 04:58:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:58:59,988 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-08-27 04:58:59,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 04:58:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-08-27 04:58:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:58:59,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:58:59,989 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 04:58:59,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:58:59,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:58:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:58:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401955, now seen corresponding path program 1 times [2021-08-27 04:58:59,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:58:59,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692894276] [2021-08-27 04:58:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:58:59,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:00,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:00,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:00,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692894276] [2021-08-27 04:59:00,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692894276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:00,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666232634] [2021-08-27 04:59:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:00,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:00,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:00,120 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 04:59:00,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:59:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 04:59:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:00,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666232634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:00,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:00,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-27 04:59:00,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591051307] [2021-08-27 04:59:00,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:59:00,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:59:00,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:59:00,537 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 04:59:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:00,707 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-08-27 04:59:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:59:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 21 [2021-08-27 04:59:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:00,708 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:59:00,708 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:59:00,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:59:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:59:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-27 04:59:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3265306122448979) 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 04:59:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-27 04:59:00,711 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 21 [2021-08-27 04:59:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:00,712 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-27 04:59:00,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 04:59:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-27 04:59:00,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:59:00,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:00,712 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:00,738 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 04:59:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:00,938 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401902, now seen corresponding path program 1 times [2021-08-27 04:59:00,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:00,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732667891] [2021-08-27 04:59:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:00,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:00,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:00,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:00,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732667891] [2021-08-27 04:59:00,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732667891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:00,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699899133] [2021-08-27 04:59:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:00,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:01,010 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 04:59:01,011 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 04:59:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 04:59:01,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:01,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699899133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:01,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 04:59:01,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-08-27 04:59:01,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948677] [2021-08-27 04:59:01,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:59:01,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:01,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:59:01,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:59:01,278 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:01,311 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-08-27 04:59:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:59:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:59:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:01,313 INFO L225 Difference]: With dead ends: 93 [2021-08-27 04:59:01,313 INFO L226 Difference]: Without dead ends: 93 [2021-08-27 04:59:01,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:59:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-27 04:59:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-08-27 04:59:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 79 states have internal predecessors, (90), 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 04:59:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-08-27 04:59:01,317 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 21 [2021-08-27 04:59:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:01,317 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-08-27 04:59:01,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-08-27 04:59:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:59:01,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:01,318 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:01,345 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 04:59:01,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:01,545 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:01,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1406448144, now seen corresponding path program 1 times [2021-08-27 04:59:01,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:01,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168008319] [2021-08-27 04:59:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:01,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,656 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 04:59:01,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:01,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168008319] [2021-08-27 04:59:01,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168008319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:01,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198958740] [2021-08-27 04:59:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:01,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:01,664 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 04:59:01,665 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 04:59:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:59:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:01,885 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:01,885 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 04:59:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:02,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198958740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:02,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:02,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:59:02,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287806564] [2021-08-27 04:59:02,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:59:02,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:59:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:59:02,033 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 04:59:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:02,139 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-08-27 04:59:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:59:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 21 [2021-08-27 04:59:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:02,140 INFO L225 Difference]: With dead ends: 88 [2021-08-27 04:59:02,140 INFO L226 Difference]: Without dead ends: 88 [2021-08-27 04:59:02,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:59:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-27 04:59:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-08-27 04:59:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 76 states have internal predecessors, (86), 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 04:59:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-08-27 04:59:02,143 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-08-27 04:59:02,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:02,143 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-08-27 04:59:02,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 04:59:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-08-27 04:59:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:59:02,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:02,144 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 04:59:02,162 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 04:59:02,352 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,SelfDestructingSolverStorable9 [2021-08-27 04:59:02,353 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1137701663, now seen corresponding path program 1 times [2021-08-27 04:59:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:02,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816381745] [2021-08-27 04:59:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:02,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:02,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:02,472 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 04:59:02,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:02,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816381745] [2021-08-27 04:59:02,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816381745] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:02,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:02,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:59:02,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995514621] [2021-08-27 04:59:02,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:59:02,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:59:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:59:02,473 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 04:59:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:02,589 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-08-27 04:59:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:59:02,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 21 [2021-08-27 04:59:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:02,590 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:59:02,590 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:59:02,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:59:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:59:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-08-27 04:59:02,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 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 04:59:02,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-08-27 04:59:02,595 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-08-27 04:59:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:02,595 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-08-27 04:59:02,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 04:59:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-08-27 04:59:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 04:59:02,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:02,596 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] [2021-08-27 04:59:02,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:59:02,596 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:02,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:02,596 INFO L82 PathProgramCache]: Analyzing trace with hash -684951934, now seen corresponding path program 1 times [2021-08-27 04:59:02,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:02,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938566428] [2021-08-27 04:59:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:02,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:02,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:02,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:02,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938566428] [2021-08-27 04:59:02,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938566428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:02,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009307450] [2021-08-27 04:59:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:02,696 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:02,701 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 04:59:02,720 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 04:59:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:02,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 04:59:02,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:03,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009307450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:03,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:03,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-08-27 04:59:03,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996206950] [2021-08-27 04:59:03,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-27 04:59:03,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:03,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-27 04:59:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:59:03,105 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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 04:59:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:03,361 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-08-27 04:59:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:59:03,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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 26 [2021-08-27 04:59:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:03,363 INFO L225 Difference]: With dead ends: 79 [2021-08-27 04:59:03,363 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:59:03,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:59:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:59:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-08-27 04:59:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 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 04:59:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-08-27 04:59:03,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2021-08-27 04:59:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:03,366 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-08-27 04:59:03,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 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 04:59:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-08-27 04:59:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-27 04:59:03,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:03,367 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] [2021-08-27 04:59:03,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:03,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:03,585 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:03,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:03,585 INFO L82 PathProgramCache]: Analyzing trace with hash -684951935, now seen corresponding path program 1 times [2021-08-27 04:59:03,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:03,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777818680] [2021-08-27 04:59:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:03,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,651 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 04:59:03,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:03,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777818680] [2021-08-27 04:59:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777818680] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:03,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:03,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:59:03,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827886020] [2021-08-27 04:59:03,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:59:03,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:03,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:59:03,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:59:03,654 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 04:59:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:03,755 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-08-27 04:59:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:59:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-08-27 04:59:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:03,756 INFO L225 Difference]: With dead ends: 69 [2021-08-27 04:59:03,756 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 04:59:03,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:59:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 04:59:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-27 04:59:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 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 04:59:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-08-27 04:59:03,759 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2021-08-27 04:59:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:03,766 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-08-27 04:59:03,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 04:59:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-08-27 04:59:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:59:03,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:03,767 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] [2021-08-27 04:59:03,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:59:03,768 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash -418036057, now seen corresponding path program 1 times [2021-08-27 04:59:03,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:03,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831839579] [2021-08-27 04:59:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:03,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:03,826 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 04:59:03,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:03,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831839579] [2021-08-27 04:59:03,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831839579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:03,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:03,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:59:03,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695461337] [2021-08-27 04:59:03,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:59:03,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:59:03,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:59:03,828 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 04:59:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:03,981 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-08-27 04:59:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:59:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2021-08-27 04:59:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:03,984 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:59:03,984 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 04:59:03,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:59:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 04:59:03,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-08-27 04:59:03,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 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 04:59:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-08-27 04:59:03,986 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2021-08-27 04:59:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:03,986 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-08-27 04:59:03,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 04:59:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-08-27 04:59:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:59:03,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:03,987 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] [2021-08-27 04:59:03,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:59:03,987 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -418036056, now seen corresponding path program 1 times [2021-08-27 04:59:03,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:03,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090007999] [2021-08-27 04:59:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:03,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:59:04,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:04,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090007999] [2021-08-27 04:59:04,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090007999] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:04,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:04,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:59:04,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461645881] [2021-08-27 04:59:04,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:59:04,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:59:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:59:04,096 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 04:59:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:04,313 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-08-27 04:59:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:59:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 30 [2021-08-27 04:59:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:04,316 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:59:04,316 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:59:04,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 133.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:59:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:59:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-08-27 04:59:04,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 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 04:59:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-08-27 04:59:04,318 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-08-27 04:59:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:04,318 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-08-27 04:59:04,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 04:59:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-08-27 04:59:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 04:59:04,319 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:04,319 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] [2021-08-27 04:59:04,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:59:04,319 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:04,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:04,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1655830610, now seen corresponding path program 1 times [2021-08-27 04:59:04,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:04,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101864923] [2021-08-27 04:59:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:04,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-08-27 04:59:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:59:04,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:04,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101864923] [2021-08-27 04:59:04,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101864923] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:04,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:04,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:59:04,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337839342] [2021-08-27 04:59:04,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:59:04,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:59:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:59:04,394 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 04:59:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:04,444 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-08-27 04:59:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:59:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 33 [2021-08-27 04:59:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:04,445 INFO L225 Difference]: With dead ends: 69 [2021-08-27 04:59:04,445 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:59:04,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:59:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:59:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:59:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 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 04:59:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-08-27 04:59:04,456 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2021-08-27 04:59:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:04,457 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-08-27 04:59:04,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 04:59:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-08-27 04:59:04,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 04:59:04,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:04,460 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:04,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:59:04,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:04,461 INFO L82 PathProgramCache]: Analyzing trace with hash 942908492, now seen corresponding path program 1 times [2021-08-27 04:59:04,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:04,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488583976] [2021-08-27 04:59:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:04,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 04:59:04,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:04,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488583976] [2021-08-27 04:59:04,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488583976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:04,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:04,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:59:04,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157950833] [2021-08-27 04:59:04,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:59:04,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:59:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:59:04,662 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 04:59:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:04,897 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-08-27 04:59:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:59:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2021-08-27 04:59:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:04,898 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:59:04,898 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 04:59:04,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:59:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 04:59:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-27 04:59:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-08-27 04:59:04,900 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2021-08-27 04:59:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-08-27 04:59:04,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 04:59:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-08-27 04:59:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-27 04:59:04,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:04,901 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:04,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:59:04,901 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash 433435402, now seen corresponding path program 1 times [2021-08-27 04:59:04,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:04,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102167741] [2021-08-27 04:59:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:04,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:05,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:05,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:05,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102167741] [2021-08-27 04:59:05,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102167741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:05,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887204227] [2021-08-27 04:59:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:05,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:05,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:05,133 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 04:59:05,134 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 04:59:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:05,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:59:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:05,377 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 04:59:05,644 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 04:59:05,736 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:59:05,737 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 04:59:06,102 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:59:06,102 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 47 treesize of output 32 [2021-08-27 04:59:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887204227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:06,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:06,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-27 04:59:06,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845848033] [2021-08-27 04:59:06,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:59:06,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:59:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:59:06,131 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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 04:59:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:06,845 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-08-27 04:59:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:59:06,845 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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 34 [2021-08-27 04:59:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:06,846 INFO L225 Difference]: With dead ends: 85 [2021-08-27 04:59:06,846 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:59:06,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:59:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:59:06,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-08-27 04:59:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 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 04:59:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-08-27 04:59:06,848 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2021-08-27 04:59:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:06,848 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-08-27 04:59:06,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 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 04:59:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-08-27 04:59:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 04:59:06,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:06,849 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:06,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:07,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:07,060 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1542789593, now seen corresponding path program 2 times [2021-08-27 04:59:07,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:07,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212556544] [2021-08-27 04:59:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:07,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:07,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:07,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:07,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212556544] [2021-08-27 04:59:07,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212556544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:07,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260798819] [2021-08-27 04:59:07,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:07,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:07,233 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 04:59:07,267 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 04:59:07,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:07,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-27 04:59:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:07,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260798819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:07,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:07,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-27 04:59:07,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969677290] [2021-08-27 04:59:07,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 04:59:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:07,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 04:59:07,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:59:07,740 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:08,118 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-08-27 04:59:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:59:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-08-27 04:59:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:08,119 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:59:08,119 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 04:59:08,120 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:59:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 04:59:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-08-27 04:59:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.140625) internal successors, (73), 65 states have internal predecessors, (73), 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 04:59:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-08-27 04:59:08,121 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 38 [2021-08-27 04:59:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:08,122 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-08-27 04:59:08,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-08-27 04:59:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:59:08,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:08,122 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:08,146 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 04:59:08,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:08,339 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -581752220, now seen corresponding path program 1 times [2021-08-27 04:59:08,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:08,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364516831] [2021-08-27 04:59:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:08,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:08,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 04:59:08,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:08,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364516831] [2021-08-27 04:59:08,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364516831] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:59:08,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:59:08,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 04:59:08,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646325402] [2021-08-27 04:59:08,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 04:59:08,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 04:59:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:59:08,516 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 04:59:08,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:08,858 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-08-27 04:59:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 04:59:08,859 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 39 [2021-08-27 04:59:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:08,859 INFO L225 Difference]: With dead ends: 94 [2021-08-27 04:59:08,859 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 04:59:08,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:59:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 04:59:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-08-27 04:59:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 86 states have internal predecessors, (95), 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 04:59:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-08-27 04:59:08,862 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 39 [2021-08-27 04:59:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:08,862 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-08-27 04:59:08,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 04:59:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-08-27 04:59:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:59:08,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:08,863 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:08,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 04:59:08,863 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash -306992606, now seen corresponding path program 1 times [2021-08-27 04:59:08,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:08,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813187834] [2021-08-27 04:59:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:08,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:09,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813187834] [2021-08-27 04:59:09,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813187834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:09,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036447393] [2021-08-27 04:59:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:09,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:09,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:09,074 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 04:59:09,106 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 04:59:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:59:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:09,548 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 04:59:09,633 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 04:59:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:09,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036447393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:09,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:09,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 19 [2021-08-27 04:59:09,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943965814] [2021-08-27 04:59:09,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:59:09,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:59:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:59:09,649 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 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 04:59:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:10,237 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-08-27 04:59:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-27 04:59:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 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 39 [2021-08-27 04:59:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:10,238 INFO L225 Difference]: With dead ends: 123 [2021-08-27 04:59:10,238 INFO L226 Difference]: Without dead ends: 123 [2021-08-27 04:59:10,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:59:10,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-27 04:59:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-08-27 04:59:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 90 states have internal predecessors, (100), 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 04:59:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-08-27 04:59:10,241 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 39 [2021-08-27 04:59:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:10,241 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-08-27 04:59:10,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 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 04:59:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-08-27 04:59:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 04:59:10,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:10,242 INFO L512 BasicCegarLoop]: trace histogram [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 04:59:10,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-27 04:59:10,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:10,445 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 149054821, now seen corresponding path program 2 times [2021-08-27 04:59:10,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:10,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336880028] [2021-08-27 04:59:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:10,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:10,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:10,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:10,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336880028] [2021-08-27 04:59:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336880028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:10,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731395748] [2021-08-27 04:59:10,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:10,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:10,657 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 04:59:10,659 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 04:59:10,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:10,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:10,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-27 04:59:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731395748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:11,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:11,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-08-27 04:59:11,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787508352] [2021-08-27 04:59:11,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-27 04:59:11,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:11,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-27 04:59:11,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-08-27 04:59:11,203 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 04:59:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:11,746 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-08-27 04:59:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:59:11,747 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 43 [2021-08-27 04:59:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:11,747 INFO L225 Difference]: With dead ends: 118 [2021-08-27 04:59:11,747 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 04:59:11,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:59:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 04:59:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-08-27 04:59:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 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 04:59:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-08-27 04:59:11,754 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 43 [2021-08-27 04:59:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:11,755 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-08-27 04:59:11,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 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 04:59:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-08-27 04:59:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 04:59:11,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:11,756 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:11,777 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 04:59:11,964 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,SelfDestructingSolverStorable21 [2021-08-27 04:59:11,965 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2091999503, now seen corresponding path program 3 times [2021-08-27 04:59:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:11,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89013604] [2021-08-27 04:59:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:11,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:12,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:12,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89013604] [2021-08-27 04:59:12,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89013604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:12,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73090952] [2021-08-27 04:59:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:59:12,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:12,465 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 04:59:12,484 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 04:59:12,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:59:12,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:12,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:59:12,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:12,826 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:12,826 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 04:59:13,365 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 27 treesize of output 23 [2021-08-27 04:59:13,492 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-08-27 04:59:13,492 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 43 treesize of output 42 [2021-08-27 04:59:15,258 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-08-27 04:59:15,258 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 61 treesize of output 45 [2021-08-27 04:59:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:15,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73090952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:15,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:15,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-08-27 04:59:15,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74774327] [2021-08-27 04:59:15,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:59:15,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:59:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:59:15,284 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:16,478 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-08-27 04:59:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:59:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-08-27 04:59:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:16,479 INFO L225 Difference]: With dead ends: 138 [2021-08-27 04:59:16,479 INFO L226 Difference]: Without dead ends: 116 [2021-08-27 04:59:16,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1339.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:59:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-27 04:59:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-08-27 04:59:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 104 states have internal predecessors, (116), 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 04:59:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-08-27 04:59:16,482 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 46 [2021-08-27 04:59:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-08-27 04:59:16,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-08-27 04:59:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 04:59:16,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:16,483 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:16,512 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 04:59:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 04:59:16,697 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:16,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 357600627, now seen corresponding path program 1 times [2021-08-27 04:59:16,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:16,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333540833] [2021-08-27 04:59:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:16,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:17,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:17,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:17,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333540833] [2021-08-27 04:59:17,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333540833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:17,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463642638] [2021-08-27 04:59:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:17,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:17,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:17,252 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 04:59:17,253 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 04:59:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:59:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:17,717 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:17,717 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 04:59:18,213 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 04:59:18,306 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-27 04:59:18,307 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 38 treesize of output 37 [2021-08-27 04:59:19,178 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-27 04:59:19,178 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 57 treesize of output 40 [2021-08-27 04:59:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463642638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:19,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-08-27 04:59:19,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324430984] [2021-08-27 04:59:19,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:59:19,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:59:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:59:19,200 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:21,062 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-08-27 04:59:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 04:59:21,065 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-08-27 04:59:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:21,066 INFO L225 Difference]: With dead ends: 152 [2021-08-27 04:59:21,066 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 04:59:21,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2043.0ms TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 04:59:21,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 04:59:21,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-08-27 04:59:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 114 states have internal predecessors, (127), 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 04:59:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-08-27 04:59:21,069 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 46 [2021-08-27 04:59:21,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:21,069 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-08-27 04:59:21,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-08-27 04:59:21,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 04:59:21,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:21,071 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:21,090 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 04:59:21,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 04:59:21,281 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:21,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:21,281 INFO L82 PathProgramCache]: Analyzing trace with hash 947634242, now seen corresponding path program 3 times [2021-08-27 04:59:21,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:21,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079709663] [2021-08-27 04:59:21,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:21,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:21,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:21,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:21,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079709663] [2021-08-27 04:59:21,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079709663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:21,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625331753] [2021-08-27 04:59:21,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:59:21,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:21,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:21,593 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 04:59:21,621 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 04:59:22,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:59:22,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-27 04:59:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:22,282 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 04:59:22,624 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-27 04:59:22,624 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 24 treesize of output 16 [2021-08-27 04:59:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:22,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625331753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:22,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:22,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2021-08-27 04:59:22,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243648829] [2021-08-27 04:59:22,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:59:22,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:22,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:59:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:59:22,637 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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 04:59:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:23,649 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2021-08-27 04:59:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-27 04:59:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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 48 [2021-08-27 04:59:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:23,650 INFO L225 Difference]: With dead ends: 167 [2021-08-27 04:59:23,650 INFO L226 Difference]: Without dead ends: 167 [2021-08-27 04:59:23,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 04:59:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-27 04:59:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2021-08-27 04:59:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 149 states have internal predecessors, (166), 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 04:59:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-08-27 04:59:23,654 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 48 [2021-08-27 04:59:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:23,654 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-08-27 04:59:23,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 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 04:59:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-08-27 04:59:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:59:23,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:23,655 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 04:59:23,682 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 04:59:23,856 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,SelfDestructingSolverStorable24 [2021-08-27 04:59:23,856 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:23,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2061037938, now seen corresponding path program 4 times [2021-08-27 04:59:23,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:23,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32760820] [2021-08-27 04:59:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:23,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:24,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:24,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:24,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32760820] [2021-08-27 04:59:24,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32760820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:24,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306419689] [2021-08-27 04:59:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:59:24,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:24,037 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 04:59:24,038 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 04:59:24,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:59:24,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:59:24,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:24,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306419689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:24,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:24,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-08-27 04:59:24,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710252035] [2021-08-27 04:59:24,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:59:24,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:24,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:59:24,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:59:24,811 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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 04:59:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:25,233 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-08-27 04:59:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:59:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:59:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:25,235 INFO L225 Difference]: With dead ends: 283 [2021-08-27 04:59:25,235 INFO L226 Difference]: Without dead ends: 283 [2021-08-27 04:59:25,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:59:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-27 04:59:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 209. [2021-08-27 04:59:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 199 states have (on average 1.120603015075377) internal successors, (223), 200 states have internal predecessors, (223), 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 04:59:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-08-27 04:59:25,241 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 50 [2021-08-27 04:59:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:25,241 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-08-27 04:59:25,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 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 04:59:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-08-27 04:59:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 04:59:25,242 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:25,242 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:59:25,262 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 04:59:25,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:25,453 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1444425936, now seen corresponding path program 2 times [2021-08-27 04:59:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:25,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698393804] [2021-08-27 04:59:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:25,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:25,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:25,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:25,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698393804] [2021-08-27 04:59:25,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698393804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:25,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505902119] [2021-08-27 04:59:25,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:25,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:25,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:25,808 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 04:59:25,809 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 04:59:26,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-27 04:59:26,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:26,361 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 04:59:26,710 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 04:59:26,765 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:59:26,765 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 04:59:27,496 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:59:27,496 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 49 treesize of output 34 [2021-08-27 04:59:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:27,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505902119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:27,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:27,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-08-27 04:59:27,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784056534] [2021-08-27 04:59:27,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 04:59:27,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 04:59:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:59:27,516 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 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 04:59:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:28,617 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2021-08-27 04:59:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:59:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-08-27 04:59:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:28,618 INFO L225 Difference]: With dead ends: 253 [2021-08-27 04:59:28,618 INFO L226 Difference]: Without dead ends: 228 [2021-08-27 04:59:28,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:59:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-27 04:59:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2021-08-27 04:59:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 212 states have (on average 1.1132075471698113) internal successors, (236), 213 states have internal predecessors, (236), 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 04:59:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2021-08-27 04:59:28,623 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 50 [2021-08-27 04:59:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:28,623 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2021-08-27 04:59:28,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 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 04:59:28,623 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2021-08-27 04:59:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 04:59:28,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:28,624 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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 04:59:28,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-27 04:59:28,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:59:28,833 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1709703263, now seen corresponding path program 4 times [2021-08-27 04:59:28,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:28,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79072844] [2021-08-27 04:59:28,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:28,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:29,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:29,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:29,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79072844] [2021-08-27 04:59:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79072844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:29,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652717234] [2021-08-27 04:59:29,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:59:29,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:29,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:29,081 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 04:59:29,111 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 04:59:29,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:59:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:59:29,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:29,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652717234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:29,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:29,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-08-27 04:59:29,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924535335] [2021-08-27 04:59:29,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:59:29,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:59:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:59:29,981 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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 04:59:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:30,553 INFO L93 Difference]: Finished difference Result 272 states and 299 transitions. [2021-08-27 04:59:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:59:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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 52 [2021-08-27 04:59:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:30,554 INFO L225 Difference]: With dead ends: 272 [2021-08-27 04:59:30,554 INFO L226 Difference]: Without dead ends: 272 [2021-08-27 04:59:30,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:59:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-27 04:59:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2021-08-27 04:59:30,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 233 states have internal predecessors, (259), 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 04:59:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2021-08-27 04:59:30,560 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 52 [2021-08-27 04:59:30,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:30,560 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2021-08-27 04:59:30,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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 04:59:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2021-08-27 04:59:30,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 04:59:30,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:30,561 INFO L512 BasicCegarLoop]: trace histogram [4, 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 04:59:30,584 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 04:59:30,783 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,SelfDestructingSolverStorable27 [2021-08-27 04:59:30,784 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1417547384, now seen corresponding path program 5 times [2021-08-27 04:59:30,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:30,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120985324] [2021-08-27 04:59:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:30,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:31,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:31,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120985324] [2021-08-27 04:59:31,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120985324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:31,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577402485] [2021-08-27 04:59:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:59:31,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:31,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:31,540 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 04:59:31,548 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 04:59:32,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:59:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-27 04:59:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:32,230 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:32,230 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 04:59:32,575 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 04:59:33,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:59:33,006 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 04:59:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:33,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577402485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:33,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:33,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 41 [2021-08-27 04:59:33,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938714181] [2021-08-27 04:59:33,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:59:33,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:33,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:59:33,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:59:33,213 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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 04:59:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:36,810 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2021-08-27 04:59:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-27 04:59:36,810 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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 57 [2021-08-27 04:59:36,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:36,811 INFO L225 Difference]: With dead ends: 338 [2021-08-27 04:59:36,811 INFO L226 Difference]: Without dead ends: 316 [2021-08-27 04:59:36,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3094.4ms TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-08-27 04:59:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-08-27 04:59:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2021-08-27 04:59:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 256 states have (on average 1.1171875) internal successors, (286), 257 states have internal predecessors, (286), 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 04:59:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2021-08-27 04:59:36,818 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 57 [2021-08-27 04:59:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:36,818 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2021-08-27 04:59:36,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 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 04:59:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2021-08-27 04:59:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 04:59:36,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:36,820 INFO L512 BasicCegarLoop]: trace histogram [4, 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 04:59:36,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-27 04:59:37,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:59:37,025 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -515149736, now seen corresponding path program 5 times [2021-08-27 04:59:37,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:37,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449428944] [2021-08-27 04:59:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:37,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:37,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:37,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:37,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449428944] [2021-08-27 04:59:37,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449428944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:37,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470237085] [2021-08-27 04:59:37,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:59:37,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:37,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:37,381 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 04:59:37,381 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 04:59:38,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:59:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-27 04:59:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:38,176 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:38,176 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 04:59:38,994 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 30 treesize of output 26 [2021-08-27 04:59:39,100 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-08-27 04:59:39,101 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 41 treesize of output 40 [2021-08-27 04:59:39,779 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 04:59:39,779 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 55 treesize of output 43 [2021-08-27 04:59:40,319 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-08-27 04:59:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-08-27 04:59:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:59:40,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470237085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:40,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:40,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-08-27 04:59:40,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060525660] [2021-08-27 04:59:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-27 04:59:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:40,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-27 04:59:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-08-27 04:59:40,339 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:42,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:42,828 INFO L93 Difference]: Finished difference Result 446 states and 485 transitions. [2021-08-27 04:59:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-27 04:59:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-08-27 04:59:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:42,834 INFO L225 Difference]: With dead ends: 446 [2021-08-27 04:59:42,834 INFO L226 Difference]: Without dead ends: 354 [2021-08-27 04:59:42,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2631.8ms TimeCoverageRelationStatistics Valid=459, Invalid=5393, Unknown=0, NotChecked=0, Total=5852 [2021-08-27 04:59:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-08-27 04:59:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 317. [2021-08-27 04:59:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 307 states have (on average 1.1205211726384365) internal successors, (344), 308 states have internal predecessors, (344), 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 04:59:42,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 352 transitions. [2021-08-27 04:59:42,843 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 352 transitions. Word has length 58 [2021-08-27 04:59:42,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:42,843 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 352 transitions. [2021-08-27 04:59:42,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:59:42,844 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 352 transitions. [2021-08-27 04:59:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 04:59:42,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:42,845 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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 04:59:42,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-27 04:59:43,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:43,065 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -179282827, now seen corresponding path program 6 times [2021-08-27 04:59:43,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:43,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581497457] [2021-08-27 04:59:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:43,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:43,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:43,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:43,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:43,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581497457] [2021-08-27 04:59:43,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581497457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:43,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26812460] [2021-08-27 04:59:43,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:59:43,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:43,286 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 04:59:43,288 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 04:59:44,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:59:44,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-27 04:59:44,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:44,152 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:59:44,153 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 04:59:44,155 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 04:59:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:44,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26812460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:44,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:44,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-08-27 04:59:44,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632277320] [2021-08-27 04:59:44,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:59:44,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:59:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:59:44,599 INFO L87 Difference]: Start difference. First operand 317 states and 352 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 04:59:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:45,169 INFO L93 Difference]: Finished difference Result 376 states and 413 transitions. [2021-08-27 04:59:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:59:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 62 [2021-08-27 04:59:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:45,171 INFO L225 Difference]: With dead ends: 376 [2021-08-27 04:59:45,172 INFO L226 Difference]: Without dead ends: 376 [2021-08-27 04:59:45,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:59:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-08-27 04:59:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2021-08-27 04:59:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.1214689265536724) internal successors, (397), 355 states have internal predecessors, (397), 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 04:59:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 405 transitions. [2021-08-27 04:59:45,180 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 405 transitions. Word has length 62 [2021-08-27 04:59:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:45,180 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 405 transitions. [2021-08-27 04:59:45,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 04:59:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 405 transitions. [2021-08-27 04:59:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-27 04:59:45,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:45,182 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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 04:59:45,210 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 04:59:45,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:45,397 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash -867919012, now seen corresponding path program 6 times [2021-08-27 04:59:45,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:45,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962460721] [2021-08-27 04:59:45,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:45,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:45,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:45,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:45,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962460721] [2021-08-27 04:59:45,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962460721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716921447] [2021-08-27 04:59:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:59:45,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:45,769 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 04:59:45,789 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 04:59:46,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:59:46,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-27 04:59:46,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:46,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:46,746 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 04:59:47,050 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 14 treesize of output 10 [2021-08-27 04:59:47,140 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 13 treesize of output 9 [2021-08-27 04:59:47,368 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 04:59:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:47,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716921447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:47,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:47,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 33 [2021-08-27 04:59:47,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890496951] [2021-08-27 04:59:47,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:59:47,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:59:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:59:47,383 INFO L87 Difference]: Start difference. First operand 364 states and 405 transitions. Second operand has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 04:59:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:49,193 INFO L93 Difference]: Finished difference Result 623 states and 683 transitions. [2021-08-27 04:59:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-27 04:59:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 66 [2021-08-27 04:59:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:49,209 INFO L225 Difference]: With dead ends: 623 [2021-08-27 04:59:49,209 INFO L226 Difference]: Without dead ends: 550 [2021-08-27 04:59:49,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=400, Invalid=3890, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 04:59:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-08-27 04:59:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 482. [2021-08-27 04:59:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 471 states have (on average 1.1252653927813163) internal successors, (530), 472 states have internal predecessors, (530), 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 04:59:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 539 transitions. [2021-08-27 04:59:49,220 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 539 transitions. Word has length 66 [2021-08-27 04:59:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:49,220 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 539 transitions. [2021-08-27 04:59:49,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 04:59:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 539 transitions. [2021-08-27 04:59:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-27 04:59:49,222 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:49,222 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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 04:59:49,251 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 04:59:49,446 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,SelfDestructingSolverStorable31 [2021-08-27 04:59:49,447 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1015556452, now seen corresponding path program 7 times [2021-08-27 04:59:49,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:49,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072722565] [2021-08-27 04:59:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:49,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:49,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:59:49,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:49,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072722565] [2021-08-27 04:59:49,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072722565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:49,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051363327] [2021-08-27 04:59:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:59:49,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:49,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:49,678 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 04:59:49,679 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 04:59:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:50,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-27 04:59:50,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:50,704 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:59:50,705 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 04:59:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:59:51,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051363327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:51,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:51,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-08-27 04:59:51,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946462234] [2021-08-27 04:59:51,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:59:51,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:59:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:59:51,150 INFO L87 Difference]: Start difference. First operand 482 states and 539 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 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 04:59:51,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:51,781 INFO L93 Difference]: Finished difference Result 671 states and 738 transitions. [2021-08-27 04:59:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:59:51,782 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 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 66 [2021-08-27 04:59:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:51,784 INFO L225 Difference]: With dead ends: 671 [2021-08-27 04:59:51,784 INFO L226 Difference]: Without dead ends: 605 [2021-08-27 04:59:51,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 04:59:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-08-27 04:59:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 560. [2021-08-27 04:59:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 548 states have (on average 1.1222627737226278) internal successors, (615), 549 states have internal predecessors, (615), 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 04:59:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 625 transitions. [2021-08-27 04:59:51,794 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 625 transitions. Word has length 66 [2021-08-27 04:59:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:51,795 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 625 transitions. [2021-08-27 04:59:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 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 04:59:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 625 transitions. [2021-08-27 04:59:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-27 04:59:51,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:51,796 INFO L512 BasicCegarLoop]: trace histogram [5, 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 04:59:51,829 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 04:59:52,016 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,SelfDestructingSolverStorable32 [2021-08-27 04:59:52,017 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:52,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2006443839, now seen corresponding path program 7 times [2021-08-27 04:59:52,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:52,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903581599] [2021-08-27 04:59:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:52,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:52,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:52,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:52,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903581599] [2021-08-27 04:59:52,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903581599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:52,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580115090] [2021-08-27 04:59:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:59:52,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:52,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:52,389 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 04:59:52,423 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 04:59:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:53,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 04:59:53,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:53,988 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 04:59:54,049 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-08-27 04:59:54,050 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 28 treesize of output 27 [2021-08-27 04:59:55,010 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-08-27 04:59:55,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-08-27 04:59:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:59:55,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580115090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:55,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:55,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 39 [2021-08-27 04:59:55,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982433500] [2021-08-27 04:59:55,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 04:59:55,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:55,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 04:59:55,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:59:55,031 INFO L87 Difference]: Start difference. First operand 560 states and 625 transitions. Second operand has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 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 04:59:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:59:57,135 INFO L93 Difference]: Finished difference Result 944 states and 1040 transitions. [2021-08-27 04:59:57,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-27 04:59:57,139 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-08-27 04:59:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:59:57,141 INFO L225 Difference]: With dead ends: 944 [2021-08-27 04:59:57,141 INFO L226 Difference]: Without dead ends: 684 [2021-08-27 04:59:57,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1842.9ms TimeCoverageRelationStatistics Valid=411, Invalid=5441, Unknown=0, NotChecked=0, Total=5852 [2021-08-27 04:59:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-08-27 04:59:57,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 620. [2021-08-27 04:59:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 607 states have (on average 1.1219110378912684) internal successors, (681), 608 states have internal predecessors, (681), 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 04:59:57,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 692 transitions. [2021-08-27 04:59:57,153 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 692 transitions. Word has length 70 [2021-08-27 04:59:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:59:57,153 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 692 transitions. [2021-08-27 04:59:57,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 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 04:59:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 692 transitions. [2021-08-27 04:59:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-27 04:59:57,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:59:57,155 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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 04:59:57,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:59:57,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:57,369 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 04:59:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:59:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -613552583, now seen corresponding path program 8 times [2021-08-27 04:59:57,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:59:57,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84907995] [2021-08-27 04:59:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:59:57,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:59:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:57,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:59:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:59:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:57,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:59:57,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84907995] [2021-08-27 04:59:57,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84907995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:57,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741103685] [2021-08-27 04:59:57,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:59:57,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:59:57,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:59:57,699 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 04:59:57,700 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 04:59:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:59:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:59:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-27 04:59:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:59:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:59:59,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741103685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:59:59,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:59:59,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2021-08-27 04:59:59,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273827695] [2021-08-27 04:59:59,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:59:59,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:59:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:59:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:59:59,312 INFO L87 Difference]: Start difference. First operand 620 states and 692 transitions. Second operand has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 05:00:00,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:00,231 INFO L93 Difference]: Finished difference Result 762 states and 845 transitions. [2021-08-27 05:00:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:00:00,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-08-27 05:00:00,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:00,233 INFO L225 Difference]: With dead ends: 762 [2021-08-27 05:00:00,233 INFO L226 Difference]: Without dead ends: 762 [2021-08-27 05:00:00,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 05:00:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-27 05:00:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 655. [2021-08-27 05:00:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 642 states have (on average 1.1246105919003115) internal successors, (722), 643 states have internal predecessors, (722), 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 05:00:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 733 transitions. [2021-08-27 05:00:00,245 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 733 transitions. Word has length 70 [2021-08-27 05:00:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:00,245 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 733 transitions. [2021-08-27 05:00:00,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 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 05:00:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 733 transitions. [2021-08-27 05:00:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-27 05:00:00,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:00,247 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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 05:00:00,274 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 05:00:00,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:00,461 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1953664988, now seen corresponding path program 8 times [2021-08-27 05:00:00,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:00,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740001348] [2021-08-27 05:00:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:00,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:00,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:00,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:00,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740001348] [2021-08-27 05:00:00,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740001348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:00,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093205294] [2021-08-27 05:00:00,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:00:00,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:00,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:00,709 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 05:00:00,736 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 05:00:01,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:00:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-27 05:00:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:02,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093205294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:02,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:02,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-08-27 05:00:02,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525074505] [2021-08-27 05:00:02,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 05:00:02,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 05:00:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-27 05:00:02,344 INFO L87 Difference]: Start difference. First operand 655 states and 733 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 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 05:00:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:03,132 INFO L93 Difference]: Finished difference Result 765 states and 850 transitions. [2021-08-27 05:00:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 05:00:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 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 74 [2021-08-27 05:00:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:03,136 INFO L225 Difference]: With dead ends: 765 [2021-08-27 05:00:03,136 INFO L226 Difference]: Without dead ends: 765 [2021-08-27 05:00:03,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 05:00:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-08-27 05:00:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 748. [2021-08-27 05:00:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 735 states have (on average 1.125170068027211) internal successors, (827), 736 states have internal predecessors, (827), 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 05:00:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 838 transitions. [2021-08-27 05:00:03,147 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 838 transitions. Word has length 74 [2021-08-27 05:00:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:03,147 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 838 transitions. [2021-08-27 05:00:03,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 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 05:00:03,147 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 838 transitions. [2021-08-27 05:00:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-27 05:00:03,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:03,149 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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 05:00:03,178 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 05:00:03,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-27 05:00:03,369 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1045914642, now seen corresponding path program 9 times [2021-08-27 05:00:03,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:03,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130772137] [2021-08-27 05:00:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:03,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 05:00:03,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:03,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130772137] [2021-08-27 05:00:03,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130772137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:03,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867476802] [2021-08-27 05:00:03,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:00:03,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:03,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:03,721 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 05:00:03,722 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 05:00:04,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 05:00:04,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 05:00:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:04,934 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:00:04,935 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 05:00:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:00:05,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 05:00:05,599 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 05:00:05,749 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-27 05:00:05,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867476802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:05,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:05,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 34 [2021-08-27 05:00:05,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887245773] [2021-08-27 05:00:05,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 05:00:05,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:05,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 05:00:05,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 05:00:05,752 INFO L87 Difference]: Start difference. First operand 748 states and 838 transitions. Second operand has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 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 05:00:10,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:10,246 INFO L93 Difference]: Finished difference Result 1142 states and 1256 transitions. [2021-08-27 05:00:10,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-27 05:00:10,246 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 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 75 [2021-08-27 05:00:10,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:10,248 INFO L225 Difference]: With dead ends: 1142 [2021-08-27 05:00:10,248 INFO L226 Difference]: Without dead ends: 803 [2021-08-27 05:00:10,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 3721.3ms TimeCoverageRelationStatistics Valid=1025, Invalid=8677, Unknown=0, NotChecked=0, Total=9702 [2021-08-27 05:00:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-08-27 05:00:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 616. [2021-08-27 05:00:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 606 states have (on average 1.1155115511551155) internal successors, (676), 606 states have internal predecessors, (676), 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 05:00:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 685 transitions. [2021-08-27 05:00:10,259 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 685 transitions. Word has length 75 [2021-08-27 05:00:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:10,259 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 685 transitions. [2021-08-27 05:00:10,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 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 05:00:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 685 transitions. [2021-08-27 05:00:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-27 05:00:10,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:10,261 INFO L512 BasicCegarLoop]: trace histogram [6, 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 05:00:10,291 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 05:00:10,484 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,SelfDestructingSolverStorable36 [2021-08-27 05:00:10,485 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:10,485 INFO L82 PathProgramCache]: Analyzing trace with hash -27278426, now seen corresponding path program 9 times [2021-08-27 05:00:10,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:10,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339188180] [2021-08-27 05:00:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:10,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:10,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:10,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339188180] [2021-08-27 05:00:10,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339188180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:10,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229317286] [2021-08-27 05:00:10,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:00:10,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:10,953 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 05:00:10,987 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 05:00:12,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 05:00:12,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-27 05:00:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:12,279 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 05:00:12,648 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 05:00:12,702 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:00:12,702 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 05:00:13,770 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:00:13,770 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 05:00:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:13,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229317286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:13,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-08-27 05:00:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215980494] [2021-08-27 05:00:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 05:00:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 05:00:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 05:00:13,790 INFO L87 Difference]: Start difference. First operand 616 states and 685 transitions. Second operand has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 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 05:00:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:47,196 INFO L93 Difference]: Finished difference Result 1106 states and 1221 transitions. [2021-08-27 05:00:47,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 05:00:47,196 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 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 82 [2021-08-27 05:00:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:47,198 INFO L225 Difference]: With dead ends: 1106 [2021-08-27 05:00:47,198 INFO L226 Difference]: Without dead ends: 630 [2021-08-27 05:00:47,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 32819.4ms TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 05:00:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-08-27 05:00:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 624. [2021-08-27 05:00:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 614 states have (on average 1.1140065146579805) internal successors, (684), 614 states have internal predecessors, (684), 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 05:00:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 693 transitions. [2021-08-27 05:00:47,207 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 693 transitions. Word has length 82 [2021-08-27 05:00:47,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:47,207 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 693 transitions. [2021-08-27 05:00:47,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 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 05:00:47,207 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 693 transitions. [2021-08-27 05:00:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-27 05:00:47,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:47,209 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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 05:00:47,236 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 05:00:47,409 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,SelfDestructingSolverStorable37 [2021-08-27 05:00:47,410 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash -958830397, now seen corresponding path program 10 times [2021-08-27 05:00:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:47,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150073077] [2021-08-27 05:00:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:47,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:47,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:47,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150073077] [2021-08-27 05:00:47,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150073077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:47,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421516339] [2021-08-27 05:00:47,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 05:00:47,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:47,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:47,733 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:47,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 05:00:49,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 05:00:49,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 05:00:49,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421516339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:49,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-08-27 05:00:49,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647901320] [2021-08-27 05:00:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 05:00:49,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 05:00:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-27 05:00:49,653 INFO L87 Difference]: Start difference. First operand 624 states and 693 transitions. Second operand has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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 05:00:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:50,456 INFO L93 Difference]: Finished difference Result 737 states and 817 transitions. [2021-08-27 05:00:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 05:00:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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 86 [2021-08-27 05:00:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:50,458 INFO L225 Difference]: With dead ends: 737 [2021-08-27 05:00:50,458 INFO L226 Difference]: Without dead ends: 737 [2021-08-27 05:00:50,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 05:00:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-08-27 05:00:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 723. [2021-08-27 05:00:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 713 states have (on average 1.1136044880785414) internal successors, (794), 713 states have internal predecessors, (794), 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 05:00:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 803 transitions. [2021-08-27 05:00:50,468 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 803 transitions. Word has length 86 [2021-08-27 05:00:50,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:50,469 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 803 transitions. [2021-08-27 05:00:50,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 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 05:00:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 803 transitions. [2021-08-27 05:00:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-27 05:00:50,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:50,471 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 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] [2021-08-27 05:00:50,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-27 05:00:50,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 05:00:50,697 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:50,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:50,697 INFO L82 PathProgramCache]: Analyzing trace with hash 305055117, now seen corresponding path program 11 times [2021-08-27 05:00:50,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:50,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25716155] [2021-08-27 05:00:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:50,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:51,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:51,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:51,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25716155] [2021-08-27 05:00:51,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25716155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:51,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271460358] [2021-08-27 05:00:51,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:00:51,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:51,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:51,163 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:51,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 05:00:52,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 05:00:52,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:00:52,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 96 conjunts are in the unsatisfiable core [2021-08-27 05:00:52,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:00:52,595 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 05:00:53,154 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 05:00:53,208 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 05:00:55,666 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:00:55,666 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 49 treesize of output 34 [2021-08-27 05:00:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:55,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271460358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:55,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:00:55,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-08-27 05:00:55,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906918607] [2021-08-27 05:00:55,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-27 05:00:55,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:00:55,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-27 05:00:55,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1870, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 05:00:55,687 INFO L87 Difference]: Start difference. First operand 723 states and 803 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 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 05:00:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:00:58,355 INFO L93 Difference]: Finished difference Result 1312 states and 1449 transitions. [2021-08-27 05:00:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 05:00:58,356 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-08-27 05:00:58,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:00:58,358 INFO L225 Difference]: With dead ends: 1312 [2021-08-27 05:00:58,358 INFO L226 Difference]: Without dead ends: 737 [2021-08-27 05:00:58,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2395.3ms TimeCoverageRelationStatistics Valid=289, Invalid=4267, Unknown=0, NotChecked=0, Total=4556 [2021-08-27 05:00:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-08-27 05:00:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 731. [2021-08-27 05:00:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 721 states have (on average 1.1123439667128987) internal successors, (802), 721 states have internal predecessors, (802), 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 05:00:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2021-08-27 05:00:58,369 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 94 [2021-08-27 05:00:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:00:58,369 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2021-08-27 05:00:58,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 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 05:00:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2021-08-27 05:00:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-27 05:00:58,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:00:58,371 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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] [2021-08-27 05:00:58,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 05:00:58,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-27 05:00:58,585 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:00:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:00:58,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1697687338, now seen corresponding path program 12 times [2021-08-27 05:00:58,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:00:58,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421865180] [2021-08-27 05:00:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:00:58,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:00:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:58,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:00:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:00:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:00:58,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:00:58,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421865180] [2021-08-27 05:00:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421865180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:00:58,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86287873] [2021-08-27 05:00:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 05:00:58,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:00:58,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:00:58,937 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:00:58,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 05:01:00,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-27 05:01:00,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:00,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-27 05:01:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86287873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:01,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:01,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-08-27 05:01:01,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745773070] [2021-08-27 05:01:01,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-27 05:01:01,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-27 05:01:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 05:01:01,339 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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 05:01:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:02,513 INFO L93 Difference]: Finished difference Result 844 states and 935 transitions. [2021-08-27 05:01:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-27 05:01:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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 98 [2021-08-27 05:01:02,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:02,516 INFO L225 Difference]: With dead ends: 844 [2021-08-27 05:01:02,516 INFO L226 Difference]: Without dead ends: 844 [2021-08-27 05:01:02,516 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1007.8ms TimeCoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2021-08-27 05:01:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-08-27 05:01:02,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 830. [2021-08-27 05:01:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 820 states have (on average 1.1121951219512196) internal successors, (912), 820 states have internal predecessors, (912), 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 05:01:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2021-08-27 05:01:02,525 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 98 [2021-08-27 05:01:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:02,526 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2021-08-27 05:01:02,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 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 05:01:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2021-08-27 05:01:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-27 05:01:02,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:02,527 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 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] [2021-08-27 05:01:02,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:02,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:02,741 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1544508172, now seen corresponding path program 13 times [2021-08-27 05:01:02,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:02,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367474652] [2021-08-27 05:01:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:02,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:03,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367474652] [2021-08-27 05:01:03,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367474652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:03,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58074267] [2021-08-27 05:01:03,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 05:01:03,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:03,323 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:03,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-27 05:01:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:04,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-27 05:01:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:05,045 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:01:05,045 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 05:01:05,613 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:01:05,613 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 14 treesize of output 14 [2021-08-27 05:01:05,904 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 05:01:05,976 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:01:05,976 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 38 treesize of output 37 [2021-08-27 05:01:08,766 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-27 05:01:08,766 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 46 treesize of output 32 [2021-08-27 05:01:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58074267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:08,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:08,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 50 [2021-08-27 05:01:08,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679017246] [2021-08-27 05:01:08,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-27 05:01:08,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-27 05:01:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 05:01:08,787 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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 05:01:26,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:26,147 INFO L93 Difference]: Finished difference Result 1524 states and 1683 transitions. [2021-08-27 05:01:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-27 05:01:26,148 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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 05:01:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:26,151 INFO L225 Difference]: With dead ends: 1524 [2021-08-27 05:01:26,151 INFO L226 Difference]: Without dead ends: 847 [2021-08-27 05:01:26,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 10945.2ms TimeCoverageRelationStatistics Valid=403, Invalid=7252, Unknown=1, NotChecked=0, Total=7656 [2021-08-27 05:01:26,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-08-27 05:01:26,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 838. [2021-08-27 05:01:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 828 states have (on average 1.1111111111111112) internal successors, (920), 828 states have internal predecessors, (920), 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 05:01:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 929 transitions. [2021-08-27 05:01:26,162 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 929 transitions. Word has length 106 [2021-08-27 05:01:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:26,162 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 929 transitions. [2021-08-27 05:01:26,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 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 05:01:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 929 transitions. [2021-08-27 05:01:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-27 05:01:26,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:26,164 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 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] [2021-08-27 05:01:26,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-27 05:01:26,381 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -326890735, now seen corresponding path program 14 times [2021-08-27 05:01:26,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:26,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808176974] [2021-08-27 05:01:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:26,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:26,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:26,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:26,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808176974] [2021-08-27 05:01:26,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808176974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:26,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637118533] [2021-08-27 05:01:26,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:01:26,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:26,771 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:26,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-27 05:01:28,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:01:28,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:28,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-27 05:01:28,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637118533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:29,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:29,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-08-27 05:01:29,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149819669] [2021-08-27 05:01:29,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-27 05:01:29,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-27 05:01:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 05:01:29,398 INFO L87 Difference]: Start difference. First operand 838 states and 929 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 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 05:01:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:30,482 INFO L93 Difference]: Finished difference Result 951 states and 1053 transitions. [2021-08-27 05:01:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-27 05:01:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-08-27 05:01:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:30,485 INFO L225 Difference]: With dead ends: 951 [2021-08-27 05:01:30,485 INFO L226 Difference]: Without dead ends: 951 [2021-08-27 05:01:30,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 755.5ms TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-08-27 05:01:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-27 05:01:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 937. [2021-08-27 05:01:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 927 states have (on average 1.1111111111111112) internal successors, (1030), 927 states have internal predecessors, (1030), 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 05:01:30,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1039 transitions. [2021-08-27 05:01:30,496 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1039 transitions. Word has length 110 [2021-08-27 05:01:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:30,496 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1039 transitions. [2021-08-27 05:01:30,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 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 05:01:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1039 transitions. [2021-08-27 05:01:30,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-27 05:01:30,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:30,498 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 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] [2021-08-27 05:01:30,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:30,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:30,725 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1760639451, now seen corresponding path program 15 times [2021-08-27 05:01:30,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:30,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350097832] [2021-08-27 05:01:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:30,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:31,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:31,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:31,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350097832] [2021-08-27 05:01:31,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350097832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:31,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448817372] [2021-08-27 05:01:31,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:01:31,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:31,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:31,385 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:31,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-27 05:01:33,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-27 05:01:33,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-27 05:01:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:33,410 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:01:33,410 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 05:01:33,425 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 05:01:34,792 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 05:01:34,874 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-08-27 05:01:34,875 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 05:01:36,797 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-08-27 05:01:36,797 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 51 treesize of output 33 [2021-08-27 05:01:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:36,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448817372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:36,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:36,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-08-27 05:01:36,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528199196] [2021-08-27 05:01:36,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-27 05:01:36,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:36,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-27 05:01:36,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-08-27 05:01:36,819 INFO L87 Difference]: Start difference. First operand 937 states and 1039 transitions. Second operand has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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 05:01:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:41,036 INFO L93 Difference]: Finished difference Result 1791 states and 1971 transitions. [2021-08-27 05:01:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-27 05:01:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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 118 [2021-08-27 05:01:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:41,039 INFO L225 Difference]: With dead ends: 1791 [2021-08-27 05:01:41,039 INFO L226 Difference]: Without dead ends: 954 [2021-08-27 05:01:41,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3557.1ms TimeCoverageRelationStatistics Valid=543, Invalid=10799, Unknown=0, NotChecked=0, Total=11342 [2021-08-27 05:01:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-27 05:01:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 945. [2021-08-27 05:01:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 935 states have (on average 1.1101604278074866) internal successors, (1038), 935 states have internal predecessors, (1038), 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 05:01:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1047 transitions. [2021-08-27 05:01:41,051 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1047 transitions. Word has length 118 [2021-08-27 05:01:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:41,051 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1047 transitions. [2021-08-27 05:01:41,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 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 05:01:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1047 transitions. [2021-08-27 05:01:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-08-27 05:01:41,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:41,052 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 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] [2021-08-27 05:01:41,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:41,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:41,281 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1908452232, now seen corresponding path program 16 times [2021-08-27 05:01:41,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:41,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944190822] [2021-08-27 05:01:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:41,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:41,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:41,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944190822] [2021-08-27 05:01:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944190822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:41,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690378614] [2021-08-27 05:01:41,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 05:01:41,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:41,678 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:41,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-27 05:01:43,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 05:01:43,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-27 05:01:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:44,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690378614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:44,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:44,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2021-08-27 05:01:44,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107852985] [2021-08-27 05:01:44,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 05:01:44,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 05:01:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 05:01:44,655 INFO L87 Difference]: Start difference. First operand 945 states and 1047 transitions. Second operand has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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 05:01:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:45,904 INFO L93 Difference]: Finished difference Result 1058 states and 1171 transitions. [2021-08-27 05:01:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 05:01:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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 122 [2021-08-27 05:01:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:45,909 INFO L225 Difference]: With dead ends: 1058 [2021-08-27 05:01:45,909 INFO L226 Difference]: Without dead ends: 1058 [2021-08-27 05:01:45,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 05:01:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-08-27 05:01:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1044. [2021-08-27 05:01:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1034 states have (on average 1.1102514506769825) internal successors, (1148), 1034 states have internal predecessors, (1148), 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 05:01:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1157 transitions. [2021-08-27 05:01:45,918 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1157 transitions. Word has length 122 [2021-08-27 05:01:45,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:45,918 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1157 transitions. [2021-08-27 05:01:45,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 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 05:01:45,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1157 transitions. [2021-08-27 05:01:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-27 05:01:45,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:45,920 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 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] [2021-08-27 05:01:45,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:46,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-27 05:01:46,146 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1255943234, now seen corresponding path program 17 times [2021-08-27 05:01:46,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:46,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497281679] [2021-08-27 05:01:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:46,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:46,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:46,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:46,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497281679] [2021-08-27 05:01:46,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497281679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:46,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936784895] [2021-08-27 05:01:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:01:46,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:46,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:46,840 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:46,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-27 05:01:49,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-27 05:01:49,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:01:49,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-27 05:01:49,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:01:50,029 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 05:01:50,104 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:01:50,105 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 31 treesize of output 30 [2021-08-27 05:01:52,809 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-08-27 05:01:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-08-27 05:01:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:52,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936784895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:52,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:01:52,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37] total 63 [2021-08-27 05:01:52,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726330390] [2021-08-27 05:01:52,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-27 05:01:52,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:01:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-27 05:01:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3755, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 05:01:52,829 INFO L87 Difference]: Start difference. First operand 1044 states and 1157 transitions. Second operand has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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 05:01:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:01:57,752 INFO L93 Difference]: Finished difference Result 2504 states and 2769 transitions. [2021-08-27 05:01:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-27 05:01:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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 130 [2021-08-27 05:01:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:01:57,754 INFO L225 Difference]: With dead ends: 2504 [2021-08-27 05:01:57,754 INFO L226 Difference]: Without dead ends: 1058 [2021-08-27 05:01:57,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 4598.0ms TimeCoverageRelationStatistics Valid=572, Invalid=12768, Unknown=0, NotChecked=0, Total=13340 [2021-08-27 05:01:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-08-27 05:01:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1052. [2021-08-27 05:01:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1042 states have (on average 1.109404990403071) internal successors, (1156), 1042 states have internal predecessors, (1156), 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 05:01:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1165 transitions. [2021-08-27 05:01:57,764 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1165 transitions. Word has length 130 [2021-08-27 05:01:57,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:01:57,764 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1165 transitions. [2021-08-27 05:01:57,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 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 05:01:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1165 transitions. [2021-08-27 05:01:57,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-27 05:01:57,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:01:57,766 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 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] [2021-08-27 05:01:57,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-27 05:01:57,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-27 05:01:57,973 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:01:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:01:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -2144451745, now seen corresponding path program 18 times [2021-08-27 05:01:57,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:01:57,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82576089] [2021-08-27 05:01:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:01:57,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:01:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:01:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:01:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:01:58,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:01:58,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82576089] [2021-08-27 05:01:58,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82576089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:01:58,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418695646] [2021-08-27 05:01:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 05:01:58,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:01:58,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:01:58,448 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:01:58,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-27 05:02:01,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-27 05:02:01,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:02:01,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 05:02:01,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:02:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 162 proven. 334 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:02:01,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418695646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:01,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:02:01,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 50 [2021-08-27 05:02:01,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284979189] [2021-08-27 05:02:01,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 05:02:01,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:02:01,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 05:02:01,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 05:02:01,990 INFO L87 Difference]: Start difference. First operand 1052 states and 1165 transitions. Second operand has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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 05:02:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:02:03,813 INFO L93 Difference]: Finished difference Result 1165 states and 1289 transitions. [2021-08-27 05:02:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 05:02:03,814 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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 134 [2021-08-27 05:02:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:02:03,816 INFO L225 Difference]: With dead ends: 1165 [2021-08-27 05:02:03,816 INFO L226 Difference]: Without dead ends: 1165 [2021-08-27 05:02:03,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1512.9ms TimeCoverageRelationStatistics Valid=633, Invalid=4623, Unknown=0, NotChecked=0, Total=5256 [2021-08-27 05:02:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-27 05:02:03,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1151. [2021-08-27 05:02:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1141 states have (on average 1.1095530236634532) internal successors, (1266), 1141 states have internal predecessors, (1266), 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 05:02:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1275 transitions. [2021-08-27 05:02:03,826 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1275 transitions. Word has length 134 [2021-08-27 05:02:03,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:02:03,826 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1275 transitions. [2021-08-27 05:02:03,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 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 05:02:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1275 transitions. [2021-08-27 05:02:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-27 05:02:03,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:02:03,828 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:02:03,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-27 05:02:04,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-27 05:02:04,045 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:02:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:02:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -675462103, now seen corresponding path program 19 times [2021-08-27 05:02:04,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:02:04,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988626342] [2021-08-27 05:02:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:02:04,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:02:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:02:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:02:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:02:04,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988626342] [2021-08-27 05:02:04,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988626342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:04,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179401580] [2021-08-27 05:02:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 05:02:04,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:02:04,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:02:04,775 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:02:04,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-27 05:02:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:02:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 120 conjunts are in the unsatisfiable core [2021-08-27 05:02:07,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:02:07,406 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 05:02:08,195 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 05:02:08,261 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 05:02:08,261 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 05:02:10,636 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 05:02:10,637 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 05:02:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:02:10,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179401580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:02:10,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:02:10,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2021-08-27 05:02:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171218213] [2021-08-27 05:02:10,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-27 05:02:10,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:02:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-27 05:02:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 05:02:10,657 INFO L87 Difference]: Start difference. First operand 1151 states and 1275 transitions. Second operand has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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 05:03:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:04,698 INFO L93 Difference]: Finished difference Result 2136 states and 2361 transitions. [2021-08-27 05:03:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-27 05:03:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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 142 [2021-08-27 05:03:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:04,702 INFO L225 Difference]: With dead ends: 2136 [2021-08-27 05:03:04,702 INFO L226 Difference]: Without dead ends: 1165 [2021-08-27 05:03:04,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 52730.0ms TimeCoverageRelationStatistics Valid=363, Invalid=7469, Unknown=0, NotChecked=0, Total=7832 [2021-08-27 05:03:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-27 05:03:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1159. [2021-08-27 05:03:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1149 states have (on average 1.1087902523933855) internal successors, (1274), 1149 states have internal predecessors, (1274), 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 05:03:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1283 transitions. [2021-08-27 05:03:04,714 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1283 transitions. Word has length 142 [2021-08-27 05:03:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:04,715 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1283 transitions. [2021-08-27 05:03:04,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 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 05:03:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1283 transitions. [2021-08-27 05:03:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-08-27 05:03:04,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:04,717 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:04,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:04,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:04,945 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:03:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1820104646, now seen corresponding path program 20 times [2021-08-27 05:03:04,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:04,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749644248] [2021-08-27 05:03:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:04,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 162 proven. 449 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:05,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:05,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749644248] [2021-08-27 05:03:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749644248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:05,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981458097] [2021-08-27 05:03:05,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 05:03:05,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:05,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:05,546 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:05,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-27 05:03:08,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 05:03:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-27 05:03:08,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:09,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981458097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:09,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:03:09,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 44 [2021-08-27 05:03:09,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050143704] [2021-08-27 05:03:09,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-27 05:03:09,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:03:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-27 05:03:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 05:03:09,298 INFO L87 Difference]: Start difference. First operand 1159 states and 1283 transitions. Second operand has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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 05:03:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:10,989 INFO L93 Difference]: Finished difference Result 1272 states and 1407 transitions. [2021-08-27 05:03:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-27 05:03:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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 146 [2021-08-27 05:03:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:10,992 INFO L225 Difference]: With dead ends: 1272 [2021-08-27 05:03:10,992 INFO L226 Difference]: Without dead ends: 1272 [2021-08-27 05:03:10,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1153.8ms TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2021-08-27 05:03:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-08-27 05:03:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1258. [2021-08-27 05:03:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1248 states have (on average 1.108974358974359) internal successors, (1384), 1248 states have internal predecessors, (1384), 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 05:03:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1393 transitions. [2021-08-27 05:03:11,002 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1393 transitions. Word has length 146 [2021-08-27 05:03:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:11,002 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1393 transitions. [2021-08-27 05:03:11,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 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 05:03:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1393 transitions. [2021-08-27 05:03:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-27 05:03:11,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:11,005 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:11,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:11,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-27 05:03:11,230 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:03:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1308606064, now seen corresponding path program 21 times [2021-08-27 05:03:11,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:11,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219012705] [2021-08-27 05:03:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:11,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:12,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:12,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219012705] [2021-08-27 05:03:12,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219012705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:12,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798047904] [2021-08-27 05:03:12,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:03:12,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:12,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:12,037 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:12,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-27 05:03:15,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-27 05:03:15,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:15,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 163 conjunts are in the unsatisfiable core [2021-08-27 05:03:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:15,163 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:03:15,163 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 05:03:17,110 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 30 treesize of output 26 [2021-08-27 05:03:17,234 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-27 05:03:17,235 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 42 treesize of output 41 [2021-08-27 05:03:22,065 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 05:03:22,065 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 54 treesize of output 50 [2021-08-27 05:03:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:22,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798047904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:22,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:03:22,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-08-27 05:03:22,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644248824] [2021-08-27 05:03:22,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-27 05:03:22,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:03:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-27 05:03:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4124, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 05:03:22,303 INFO L87 Difference]: Start difference. First operand 1258 states and 1393 transitions. Second operand has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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 05:03:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:28,695 INFO L93 Difference]: Finished difference Result 2433 states and 2679 transitions. [2021-08-27 05:03:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-27 05:03:28,695 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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 154 [2021-08-27 05:03:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:28,698 INFO L225 Difference]: With dead ends: 2433 [2021-08-27 05:03:28,698 INFO L226 Difference]: Without dead ends: 1275 [2021-08-27 05:03:28,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 5469.1ms TimeCoverageRelationStatistics Valid=677, Invalid=17683, Unknown=0, NotChecked=0, Total=18360 [2021-08-27 05:03:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-08-27 05:03:28,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1266. [2021-08-27 05:03:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1256 states have (on average 1.10828025477707) internal successors, (1392), 1256 states have internal predecessors, (1392), 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 05:03:28,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1401 transitions. [2021-08-27 05:03:28,710 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1401 transitions. Word has length 154 [2021-08-27 05:03:28,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:28,710 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1401 transitions. [2021-08-27 05:03:28,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 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 05:03:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1401 transitions. [2021-08-27 05:03:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-08-27 05:03:28,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:28,712 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:28,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:28,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-27 05:03:28,913 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:03:28,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -508161619, now seen corresponding path program 22 times [2021-08-27 05:03:28,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:28,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438492534] [2021-08-27 05:03:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:28,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 200 proven. 538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:29,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:29,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438492534] [2021-08-27 05:03:29,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438492534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:29,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661100487] [2021-08-27 05:03:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 05:03:29,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:29,491 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:29,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-27 05:03:32,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 05:03:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 114 conjunts are in the unsatisfiable core [2021-08-27 05:03:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:33,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661100487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:33,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:03:33,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2021-08-27 05:03:33,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564010423] [2021-08-27 05:03:33,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-27 05:03:33,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:03:33,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-27 05:03:33,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 05:03:33,817 INFO L87 Difference]: Start difference. First operand 1266 states and 1401 transitions. Second operand has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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 05:03:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:35,709 INFO L93 Difference]: Finished difference Result 1379 states and 1525 transitions. [2021-08-27 05:03:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 05:03:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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 158 [2021-08-27 05:03:35,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:35,712 INFO L225 Difference]: With dead ends: 1379 [2021-08-27 05:03:35,712 INFO L226 Difference]: Without dead ends: 1379 [2021-08-27 05:03:35,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1106.9ms TimeCoverageRelationStatistics Valid=428, Invalid=3478, Unknown=0, NotChecked=0, Total=3906 [2021-08-27 05:03:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-08-27 05:03:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1365. [2021-08-27 05:03:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1355 states have (on average 1.1084870848708488) internal successors, (1502), 1355 states have internal predecessors, (1502), 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 05:03:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1511 transitions. [2021-08-27 05:03:35,723 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1511 transitions. Word has length 158 [2021-08-27 05:03:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:35,724 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1511 transitions. [2021-08-27 05:03:35,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 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 05:03:35,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1511 transitions. [2021-08-27 05:03:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-27 05:03:35,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:35,726 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:35,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-27 05:03:35,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:35,941 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:03:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash 7398519, now seen corresponding path program 23 times [2021-08-27 05:03:35,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:35,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938288651] [2021-08-27 05:03:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:35,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:36,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:36,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938288651] [2021-08-27 05:03:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938288651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719551244] [2021-08-27 05:03:36,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 05:03:36,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:36,878 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:36,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-27 05:03:40,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-27 05:03:40,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:03:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 139 conjunts are in the unsatisfiable core [2021-08-27 05:03:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:03:40,426 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:03:40,426 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 05:03:42,118 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 05:03:42,204 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 05:03:42,204 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 34 treesize of output 33 [2021-08-27 05:03:45,298 INFO L354 Elim1Store]: treesize reduction 47, result has 17.5 percent of original size [2021-08-27 05:03:45,298 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 39 treesize of output 25 [2021-08-27 05:03:45,748 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 242 proven. 586 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:45,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719551244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:45,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:03:45,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2021-08-27 05:03:45,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837220403] [2021-08-27 05:03:45,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-27 05:03:45,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:03:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-27 05:03:45,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4731, Unknown=0, NotChecked=0, Total=4970 [2021-08-27 05:03:45,750 INFO L87 Difference]: Start difference. First operand 1365 states and 1511 transitions. Second operand has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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 05:03:56,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:03:56,684 INFO L93 Difference]: Finished difference Result 2757 states and 3025 transitions. [2021-08-27 05:03:56,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-08-27 05:03:56,685 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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 166 [2021-08-27 05:03:56,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:03:56,688 INFO L225 Difference]: With dead ends: 2757 [2021-08-27 05:03:56,688 INFO L226 Difference]: Without dead ends: 1492 [2021-08-27 05:03:56,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6587 ImplicationChecksByTransitivity, 8758.2ms TimeCoverageRelationStatistics Valid=1216, Invalid=27176, Unknown=0, NotChecked=0, Total=28392 [2021-08-27 05:03:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-27 05:03:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1385. [2021-08-27 05:03:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1374 states have (on average 1.1069868995633187) internal successors, (1521), 1374 states have internal predecessors, (1521), 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 05:03:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1531 transitions. [2021-08-27 05:03:56,700 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1531 transitions. Word has length 166 [2021-08-27 05:03:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:03:56,700 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 1531 transitions. [2021-08-27 05:03:56,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 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 05:03:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1531 transitions. [2021-08-27 05:03:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-27 05:03:56,717 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:03:56,717 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:03:56,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-27 05:03:56,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-27 05:03:56,941 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-08-27 05:03:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:03:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash -528625514, now seen corresponding path program 3 times [2021-08-27 05:03:56,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:03:56,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506462741] [2021-08-27 05:03:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:03:56,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:03:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:57,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:03:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:03:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 242 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 05:03:57,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:03:57,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506462741] [2021-08-27 05:03:57,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506462741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:03:57,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963197704] [2021-08-27 05:03:57,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 05:03:57,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:03:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:03:57,669 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 05:03:57,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-27 05:04:01,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-27 05:04:01,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 05:04:01,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 05:04:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:04:01,703 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 05:04:01,704 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 05:04:01,721 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 05:04:02,559 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 23 treesize of output 19 [2021-08-27 05:04:02,624 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 05:04:02,625 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 39 treesize of output 38 [2021-08-27 05:04:04,706 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-08-27 05:04:04,707 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 44 treesize of output 32 [2021-08-27 05:04:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 11 proven. 90 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-08-27 05:04:04,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963197704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 05:04:04,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 05:04:04,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 42 [2021-08-27 05:04:04,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034157830] [2021-08-27 05:04:04,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 05:04:04,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:04:04,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 05:04:04,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 05:04:04,921 INFO L87 Difference]: Start difference. First operand 1385 states and 1531 transitions. Second operand has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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 05:04:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:04:11,936 INFO L93 Difference]: Finished difference Result 1567 states and 1719 transitions. [2021-08-27 05:04:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-27 05:04:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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 170 [2021-08-27 05:04:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:04:11,937 INFO L225 Difference]: With dead ends: 1567 [2021-08-27 05:04:11,937 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 05:04:11,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 4222.5ms TimeCoverageRelationStatistics Valid=821, Invalid=7011, Unknown=0, NotChecked=0, Total=7832 [2021-08-27 05:04:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 05:04:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 05:04:11,938 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 05:04:11,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 05:04:11,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-08-27 05:04:11,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:04:11,938 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 05:04:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 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 05:04:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 05:04:11,938 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:04:11,940 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:04:11,941 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:04:11,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-27 05:04:12,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 05:04:12,146 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:04:12,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:04:12 BoogieIcfgContainer [2021-08-27 05:04:12,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:04:12,149 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:04:12,149 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:04:12,149 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:04:12,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:58:57" (3/4) ... [2021-08-27 05:04:12,152 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 05:04:12,158 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 05:04:12,158 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-08-27 05:04:12,158 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 05:04:12,159 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 05:04:12,159 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 05:04:12,159 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 05:04:12,159 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 05:04:12,159 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 05:04:12,167 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-08-27 05:04:12,167 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-27 05:04:12,167 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 05:04:12,167 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 05:04:12,204 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:04:12,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:04:12,205 INFO L168 Benchmark]: Toolchain (without parser) took 315772.05 ms. Allocated memory was 50.3 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 25.9 MB in the beginning and 478.4 MB in the end (delta: -452.5 MB). Peak memory consumption was 688.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,205 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:04:12,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.32 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.8 MB in the beginning and 38.7 MB in the end (delta: -13.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,206 INFO L168 Benchmark]: Boogie Preprocessor took 39.64 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,207 INFO L168 Benchmark]: RCFGBuilder took 522.39 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 40.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,207 INFO L168 Benchmark]: TraceAbstraction took 314813.48 ms. Allocated memory was 60.8 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 40.5 MB in the beginning and 481.0 MB in the end (delta: -440.6 MB). Peak memory consumption was 687.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,207 INFO L168 Benchmark]: Witness Printer took 55.44 ms. Allocated memory is still 1.2 GB. Free memory was 481.0 MB in the beginning and 478.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:04:12,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 32.2 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.32 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 25.8 MB in the beginning and 38.7 MB in the end (delta: -13.0 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.64 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 522.39 ms. Allocated memory is still 60.8 MB. Free memory was 36.2 MB in the beginning and 40.8 MB in the end (delta: -4.6 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 314813.48 ms. Allocated memory was 60.8 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 40.5 MB in the beginning and 481.0 MB in the end (delta: -440.6 MB). Peak memory consumption was 687.2 MB. Max. memory is 16.1 GB. * Witness Printer took 55.44 ms. Allocated memory is still 1.2 GB. Free memory was 481.0 MB in the beginning and 478.4 MB in the end (delta: 2.6 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: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 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: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: 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: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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, 67 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 314770.8ms, OverallIterations: 53, TraceHistogramMax: 13, EmptinessCheckTime: 72.7ms, AutomataDifference: 179118.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2646 SDtfs, 9579 SDslu, 13748 SDs, 0 SdLazy, 84547 SolverSat, 1528 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 42202.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5053 GetRequests, 2704 SyntacticMatches, 27 SemanticMatches, 2322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40494 ImplicationChecksByTransitivity, 156023.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1385occurred in iteration=52, InterpolantAutomatonStates: 1345, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 356.3ms AutomataMinimizationTime, 53 MinimizatonAttempts, 1118 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 597.9ms SsaConstructionTime, 2983.7ms SatisfiabilityAnalysisTime, 73907.1ms InterpolantComputationTime, 6644 NumberOfCodeBlocks, 6596 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 6550 ConstructedInterpolants, 755 QuantifiedInterpolants, 84091 SizeOfPredicates, 733 NumberOfNonLiveVariables, 13656 ConjunctsInSsa, 2526 ConjunctsInUnsatCore, 94 InterpolantComputations, 14 PerfectInterpolantSequences, 4320/16412 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 05:04:12,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...