./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.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/cstrcspn-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dd713315a01a83d82c28c42f2ad6c72c3349a374 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:41:47,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:41:47,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:41:47,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:41:47,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:41:47,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:41:47,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:41:47,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:41:47,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:41:47,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:41:47,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:41:47,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:41:47,934 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:41:47,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:41:47,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:41:47,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:41:47,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:41:47,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:41:47,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:41:47,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:41:47,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:41:47,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:41:47,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:41:47,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:41:47,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:41:47,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:41:47,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:41:47,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:41:47,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:41:47,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:41:47,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:41:47,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:41:47,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:41:47,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:41:47,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:41:47,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:41:47,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:41:47,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:41:47,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:41:47,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:41:47,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:41:47,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:41:48,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:41:48,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:41:48,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:41:48,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:41:48,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:41:48,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:41:48,003 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:41:48,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:41:48,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:41:48,004 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:41:48,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:41:48,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:41:48,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:41:48,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:41:48,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:41:48,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:41:48,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:41:48,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:41:48,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:48,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:41:48,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:41:48,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:41:48,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:41:48,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:41:48,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd713315a01a83d82c28c42f2ad6c72c3349a374 [2021-08-27 04:41:48,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:41:48,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:41:48,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:41:48,298 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:41:48,299 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:41:48,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-08-27 04:41:48,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c0948ec/f543a2ffe43c4091ba38cfa824a435e4/FLAG30a12e1b1 [2021-08-27 04:41:48,736 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:41:48,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2021-08-27 04:41:48,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c0948ec/f543a2ffe43c4091ba38cfa824a435e4/FLAG30a12e1b1 [2021-08-27 04:41:48,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74c0948ec/f543a2ffe43c4091ba38cfa824a435e4 [2021-08-27 04:41:48,756 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:41:48,758 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:41:48,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:48,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:41:48,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:41:48,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:48" (1/1) ... [2021-08-27 04:41:48,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af73b5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:48, skipping insertion in model container [2021-08-27 04:41:48,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:48" (1/1) ... [2021-08-27 04:41:48,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:41:48,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:41:49,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:49,061 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:41:49,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:49,114 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:41:49,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49 WrapperNode [2021-08-27 04:41:49,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:49,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:41:49,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:41:49,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:41:49,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:41:49,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:41:49,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:41:49,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:41:49,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (1/1) ... [2021-08-27 04:41:49,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:49,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:49,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:41:49,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:41:49,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:41:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:41:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcspn [2021-08-27 04:41:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:41:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:41:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:41:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:41:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:41:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:41:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:41:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:41:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:41:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:41:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:41:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:41:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:41:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:41:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:41:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:41:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:41:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:41:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:41:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:41:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:41:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:41:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:41:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:41:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:41:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:41:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:41:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:41:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:41:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:41:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:41:49,266 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcspn [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:41:49,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:41:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:41:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:41:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:41:49,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:41:49,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:41:49,663 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 04:41:49,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:49 BoogieIcfgContainer [2021-08-27 04:41:49,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:41:49,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:41:49,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:41:49,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:41:49,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:41:48" (1/3) ... [2021-08-27 04:41:49,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ab5d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:49, skipping insertion in model container [2021-08-27 04:41:49,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:49" (2/3) ... [2021-08-27 04:41:49,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ab5d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:49, skipping insertion in model container [2021-08-27 04:41:49,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:49" (3/3) ... [2021-08-27 04:41:49,669 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2021-08-27 04:41:49,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:41:49,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:41:49,712 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:41:49,718 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:41:49,719 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:41:49,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 04:41:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:49,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:49,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2021-08-27 04:41:49,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:49,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301785549] [2021-08-27 04:41:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301785549] [2021-08-27 04:41:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301785549] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:49,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:49,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:49,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298054596] [2021-08-27 04:41:49,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:49,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:49,974 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,134 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-08-27 04:41:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:41:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,141 INFO L225 Difference]: With dead ends: 83 [2021-08-27 04:41:50,141 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:41:50,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:41:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-08-27 04:41:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-08-27 04:41:50,173 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-08-27 04:41:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,174 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-08-27 04:41:50,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-08-27 04:41:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:50,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,178 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:41:50,179 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2021-08-27 04:41:50,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977735269] [2021-08-27 04:41:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977735269] [2021-08-27 04:41:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977735269] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:50,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685674904] [2021-08-27 04:41:50,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:50,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:50,300 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,431 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-08-27 04:41:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:50,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 04:41:50,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,434 INFO L225 Difference]: With dead ends: 84 [2021-08-27 04:41:50,434 INFO L226 Difference]: Without dead ends: 84 [2021-08-27 04:41:50,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-27 04:41:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-08-27 04:41:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.725) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:41:50,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2021-08-27 04:41:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,445 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:41:50,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,445 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:41:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:50,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,446 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:41:50,446 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2021-08-27 04:41:50,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577355796] [2021-08-27 04:41:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577355796] [2021-08-27 04:41:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577355796] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:50,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327333974] [2021-08-27 04:41:50,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:50,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,505 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,583 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-08-27 04:41:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:50,586 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 04:41:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,588 INFO L225 Difference]: With dead ends: 62 [2021-08-27 04:41:50,588 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:41:50,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:41:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:41:50,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-27 04:41:50,600 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-08-27 04:41:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,600 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-27 04:41:50,600 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 04:41:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-27 04:41:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:50,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:41:50,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2021-08-27 04:41:50,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470019502] [2021-08-27 04:41:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470019502] [2021-08-27 04:41:50,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470019502] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:50,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542589572] [2021-08-27 04:41:50,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:50,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:50,683 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,759 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-27 04:41:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,760 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:41:50,760 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 04:41:50,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 04:41:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-27 04:41:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-27 04:41:50,763 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-27 04:41:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,763 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-27 04:41:50,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-27 04:41:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:50,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,764 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:41:50,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2021-08-27 04:41:50,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060231905] [2021-08-27 04:41:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060231905] [2021-08-27 04:41:50,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060231905] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:50,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814752340] [2021-08-27 04:41:50,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:50,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:50,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:50,798 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,906 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-27 04:41:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,908 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:41:50,908 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:41:50,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:41:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:41:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-08-27 04:41:50,924 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-08-27 04:41:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,924 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-08-27 04:41:50,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-08-27 04:41:50,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:50,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:41:50,927 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:50,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2021-08-27 04:41:50,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126750787] [2021-08-27 04:41:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126750787] [2021-08-27 04:41:50,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126750787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:50,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036255924] [2021-08-27 04:41:50,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:50,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:50,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,951 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,021 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-08-27 04:41:51,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:51,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:51,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,022 INFO L225 Difference]: With dead ends: 70 [2021-08-27 04:41:51,022 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 04:41:51,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 04:41:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-27 04:41:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-08-27 04:41:51,024 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-08-27 04:41:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,025 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-08-27 04:41:51,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-08-27 04:41:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:51,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:41:51,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:51,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2021-08-27 04:41:51,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143606869] [2021-08-27 04:41:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143606869] [2021-08-27 04:41:51,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143606869] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:51,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448284158] [2021-08-27 04:41:51,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:51,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:51,103 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,218 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-08-27 04:41:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 04:41:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,219 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:41:51,219 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:41:51,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:41:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 04:41:51,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-27 04:41:51,222 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-08-27 04:41:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,222 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-27 04:41:51,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,222 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-27 04:41:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:51,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,223 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:41:51,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2021-08-27 04:41:51,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157359035] [2021-08-27 04:41:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157359035] [2021-08-27 04:41:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157359035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:51,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452558602] [2021-08-27 04:41:51,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:51,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:51,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:51,272 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,339 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-08-27 04:41:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 04:41:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,341 INFO L225 Difference]: With dead ends: 71 [2021-08-27 04:41:51,341 INFO L226 Difference]: Without dead ends: 71 [2021-08-27 04:41:51,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-27 04:41:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-27 04:41:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-08-27 04:41:51,349 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-08-27 04:41:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,349 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-08-27 04:41:51,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-08-27 04:41:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:41:51,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,350 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:51,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:41:51,350 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2021-08-27 04:41:51,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629874686] [2021-08-27 04:41:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629874686] [2021-08-27 04:41:51,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629874686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:51,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643033202] [2021-08-27 04:41:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:51,437 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:41:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:41:51,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:51,700 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:41:51,701 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 04:41:51,712 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 04:41:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:51,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643033202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:51,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:51,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:41:51,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763311528] [2021-08-27 04:41:51,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:41:51,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:41:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:51,817 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,935 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-08-27 04:41:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:51,936 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 04:41:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,936 INFO L225 Difference]: With dead ends: 90 [2021-08-27 04:41:51,936 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 04:41:51,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:51,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 04:41:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-08-27 04:41:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-27 04:41:51,938 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-08-27 04:41:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,939 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-27 04:41:51,939 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 04:41:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-27 04:41:51,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:51,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,939 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 04:41:51,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:52,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,153 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcspnErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736785, now seen corresponding path program 1 times [2021-08-27 04:41:52,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136040206] [2021-08-27 04:41:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136040206] [2021-08-27 04:41:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136040206] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832259921] [2021-08-27 04:41:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:52,194 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,310 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:41:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:41:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,311 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:41:52,311 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:41:52,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:41:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:41:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:41:52,314 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:41:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,315 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:41:52,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:41:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:52,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,317 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 04:41:52,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:41:52,317 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736784, now seen corresponding path program 1 times [2021-08-27 04:41:52,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796035616] [2021-08-27 04:41:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796035616] [2021-08-27 04:41:52,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796035616] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:41:52,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468296307] [2021-08-27 04:41:52,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:52,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:52,405 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,592 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-27 04:41:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:52,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:41:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,594 INFO L225 Difference]: With dead ends: 86 [2021-08-27 04:41:52,594 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 04:41:52,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:41:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 04:41:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-08-27 04:41:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-27 04:41:52,595 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-08-27 04:41:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,596 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-27 04:41:52,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-27 04:41:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:52,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,596 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 04:41:52,597 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2021-08-27 04:41:52,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068835674] [2021-08-27 04:41:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068835674] [2021-08-27 04:41:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068835674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223724858] [2021-08-27 04:41:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:52,685 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:52,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:41:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:41:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:52,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:41:52,832 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 04:41:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223724858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:52,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:41:52,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318570049] [2021-08-27 04:41:52,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:52,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:52,936 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,064 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-27 04:41:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 04:41:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,065 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:41:53,065 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:41:53,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:41:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:41:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2021-08-27 04:41:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:41:53,072 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-27 04:41:53,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,072 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:41:53,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:41:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:53,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,073 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 04:41:53,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:53,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-27 04:41:53,281 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcspnErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 63888821, now seen corresponding path program 1 times [2021-08-27 04:41:53,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084562528] [2021-08-27 04:41:53,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084562528] [2021-08-27 04:41:53,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084562528] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:53,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:53,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:41:53,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138614239] [2021-08-27 04:41:53,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:41:53,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:41:53,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:53,317 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,422 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:41:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:41:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,423 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:41:53,423 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:41:53,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:41:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:41:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-08-27 04:41:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-08-27 04:41:53,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-08-27 04:41:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-08-27 04:41:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-08-27 04:41:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:53,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,426 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 04:41:53,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:41:53,427 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 63888822, now seen corresponding path program 1 times [2021-08-27 04:41:53,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635106778] [2021-08-27 04:41:53,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635106778] [2021-08-27 04:41:53,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635106778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:53,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:53,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 04:41:53,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935542754] [2021-08-27 04:41:53,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:41:53,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:41:53,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:41:53,498 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,687 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-08-27 04:41:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:41:53,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-27 04:41:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,688 INFO L225 Difference]: With dead ends: 76 [2021-08-27 04:41:53,688 INFO L226 Difference]: Without dead ends: 76 [2021-08-27 04:41:53,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:41:53,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-27 04:41:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-08-27 04:41:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-08-27 04:41:53,692 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-08-27 04:41:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,692 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-08-27 04:41:53,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-08-27 04:41:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-27 04:41:53,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,692 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:53,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:41:53,693 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1250379430, now seen corresponding path program 1 times [2021-08-27 04:41:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268333812] [2021-08-27 04:41:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:41:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268333812] [2021-08-27 04:41:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268333812] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:53,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:53,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:53,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203405696] [2021-08-27 04:41:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:53,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:53,732 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:53,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,779 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-08-27 04:41:53,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:53,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-08-27 04:41:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,781 INFO L225 Difference]: With dead ends: 67 [2021-08-27 04:41:53,781 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 04:41:53,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 04:41:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-27 04:41:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:41:53,783 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-08-27 04:41:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,783 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:41:53,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:41:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-27 04:41:53,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,784 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:53,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:41:53,784 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1590997555, now seen corresponding path program 1 times [2021-08-27 04:41:53,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754452138] [2021-08-27 04:41:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:53,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754452138] [2021-08-27 04:41:53,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754452138] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:53,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:53,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:53,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660935470] [2021-08-27 04:41:53,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:53,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:53,808 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,853 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-27 04:41:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-08-27 04:41:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,854 INFO L225 Difference]: With dead ends: 64 [2021-08-27 04:41:53,854 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 04:41:53,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 04:41:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-27 04:41:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-27 04:41:53,856 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-08-27 04:41:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,856 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-27 04:41:53,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-27 04:41:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:41:53,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,857 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:53,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:41:53,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,857 INFO L82 PathProgramCache]: Analyzing trace with hash 53849226, now seen corresponding path program 1 times [2021-08-27 04:41:53,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930819675] [2021-08-27 04:41:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,966 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 04:41:53,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930819675] [2021-08-27 04:41:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930819675] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:53,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:53,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 04:41:53,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440685909] [2021-08-27 04:41:53,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 04:41:53,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 04:41:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:41:53,967 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:54,133 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-08-27 04:41:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:41:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:54,134 INFO L225 Difference]: With dead ends: 77 [2021-08-27 04:41:54,134 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:41:54,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-27 04:41:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:41:54,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:41:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-08-27 04:41:54,136 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-08-27 04:41:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:54,136 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-08-27 04:41:54,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-08-27 04:41:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-27 04:41:54,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:54,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:54,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:41:54,137 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash 476551052, now seen corresponding path program 1 times [2021-08-27 04:41:54,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:54,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227342886] [2021-08-27 04:41:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:54,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,283 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 04:41:54,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:54,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227342886] [2021-08-27 04:41:54,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227342886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:54,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:54,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:41:54,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565908700] [2021-08-27 04:41:54,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:41:54,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:41:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:41:54,285 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:54,452 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-27 04:41:54,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:54,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-27 04:41:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:54,453 INFO L225 Difference]: With dead ends: 80 [2021-08-27 04:41:54,453 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 04:41:54,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:41:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 04:41:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-27 04:41:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-08-27 04:41:54,457 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-08-27 04:41:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:54,457 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-08-27 04:41:54,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-08-27 04:41:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:41:54,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:54,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:54,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:41:54,458 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:54,458 INFO L82 PathProgramCache]: Analyzing trace with hash -183584433, now seen corresponding path program 1 times [2021-08-27 04:41:54,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:54,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409226192] [2021-08-27 04:41:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:54,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,566 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 04:41:54,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:54,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409226192] [2021-08-27 04:41:54,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409226192] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:54,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:54,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:41:54,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601978014] [2021-08-27 04:41:54,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:41:54,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:41:54,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:41:54,568 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:54,808 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-08-27 04:41:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:41:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-27 04:41:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:54,809 INFO L225 Difference]: With dead ends: 81 [2021-08-27 04:41:54,809 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 04:41:54,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:41:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 04:41:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-08-27 04:41:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-08-27 04:41:54,811 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-08-27 04:41:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:54,812 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-08-27 04:41:54,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-08-27 04:41:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 04:41:54,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:54,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:41:54,813 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash -317597939, now seen corresponding path program 1 times [2021-08-27 04:41:54,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:54,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995354460] [2021-08-27 04:41:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:54,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,958 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 04:41:54,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:54,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995354460] [2021-08-27 04:41:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995354460] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:54,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:54,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-27 04:41:54,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917817754] [2021-08-27 04:41:54,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 04:41:54,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 04:41:54,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:41:54,960 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:55,186 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-08-27 04:41:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 04:41:55,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-08-27 04:41:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:55,187 INFO L225 Difference]: With dead ends: 103 [2021-08-27 04:41:55,187 INFO L226 Difference]: Without dead ends: 103 [2021-08-27 04:41:55,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:41:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-27 04:41:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-08-27 04:41:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-08-27 04:41:55,190 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-08-27 04:41:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:55,190 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-08-27 04:41:55,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-08-27 04:41:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:41:55,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:55,191 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:55,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 04:41:55,191 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1215695489, now seen corresponding path program 1 times [2021-08-27 04:41:55,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:55,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138915539] [2021-08-27 04:41:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:55,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:55,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:55,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138915539] [2021-08-27 04:41:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138915539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785863715] [2021-08-27 04:41:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:55,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:55,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:55,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:41:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:41:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:55,464 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:41:55,464 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 04:41:55,468 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 04:41:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:55,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785863715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:55,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-27 04:41:55,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483218976] [2021-08-27 04:41:55,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:41:55,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:41:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:41:55,668 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:55,926 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2021-08-27 04:41:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:55,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 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 32 [2021-08-27 04:41:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:55,928 INFO L225 Difference]: With dead ends: 152 [2021-08-27 04:41:55,928 INFO L226 Difference]: Without dead ends: 152 [2021-08-27 04:41:55,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:41:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-27 04:41:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-08-27 04:41:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 103 states have (on average 1.2233009708737863) internal successors, (126), 107 states have internal predecessors, (126), 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 04:41:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-08-27 04:41:55,930 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 32 [2021-08-27 04:41:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-08-27 04:41:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-08-27 04:41:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-27 04:41:55,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:55,932 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:55,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:56,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:56,145 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:56,145 INFO L82 PathProgramCache]: Analyzing trace with hash 929596304, now seen corresponding path program 1 times [2021-08-27 04:41:56,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:56,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504458950] [2021-08-27 04:41:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:56,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:56,270 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 04:41:56,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:56,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504458950] [2021-08-27 04:41:56,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504458950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:56,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352238124] [2021-08-27 04:41:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:56,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:56,285 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:56,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:41:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:56,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 04:41:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:56,619 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 04:41:56,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352238124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:56,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:56,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-27 04:41:56,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964136151] [2021-08-27 04:41:56,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:41:56,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:56,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:41:56,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:41:56,621 INFO L87 Difference]: Start difference. First operand 113 states and 131 transitions. Second operand has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:56,978 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2021-08-27 04:41:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-27 04:41:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:56,979 INFO L225 Difference]: With dead ends: 152 [2021-08-27 04:41:56,980 INFO L226 Difference]: Without dead ends: 152 [2021-08-27 04:41:56,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:41:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-27 04:41:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 125. [2021-08-27 04:41:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 119 states have internal predecessors, (142), 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 04:41:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2021-08-27 04:41:56,987 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 35 [2021-08-27 04:41:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:56,988 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2021-08-27 04:41:56,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:41:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2021-08-27 04:41:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 04:41:56,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:56,989 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:57,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:57,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:57,207 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:41:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -800192796, now seen corresponding path program 2 times [2021-08-27 04:41:57,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:57,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837754456] [2021-08-27 04:41:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:57,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:57,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:57,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837754456] [2021-08-27 04:41:57,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837754456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:57,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111135481] [2021-08-27 04:41:57,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:41:57,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:57,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:41:57,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:41:57,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:41:57,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:57,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-27 04:41:57,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:57,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 04:41:58,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 04:41:58,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-08-27 04:41:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111135481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:58,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:58,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-08-27 04:41:58,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533618456] [2021-08-27 04:41:58,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:41:58,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:58,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:41:58,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:41:58,391 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:00,120 INFO L93 Difference]: Finished difference Result 248 states and 277 transitions. [2021-08-27 04:42:00,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:42:00,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-08-27 04:42:00,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:00,121 INFO L225 Difference]: With dead ends: 248 [2021-08-27 04:42:00,122 INFO L226 Difference]: Without dead ends: 248 [2021-08-27 04:42:00,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1117.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1970, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:42:00,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-27 04:42:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 182. [2021-08-27 04:42:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 171 states have (on average 1.2222222222222223) internal successors, (209), 175 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 215 transitions. [2021-08-27 04:42:00,126 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 215 transitions. Word has length 41 [2021-08-27 04:42:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:00,126 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 215 transitions. [2021-08-27 04:42:00,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 215 transitions. [2021-08-27 04:42:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 04:42:00,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:00,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:00,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 04:42:00,336 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,SelfDestructingSolverStorable22 [2021-08-27 04:42:00,337 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:00,337 INFO L82 PathProgramCache]: Analyzing trace with hash 23212469, now seen corresponding path program 2 times [2021-08-27 04:42:00,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:00,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564710720] [2021-08-27 04:42:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:00,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:00,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:00,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564710720] [2021-08-27 04:42:00,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564710720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:00,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010504769] [2021-08-27 04:42:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:00,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:00,643 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:00,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:42:00,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:00,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:42:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:00,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:42:01,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:01,066 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-08-27 04:42:01,067 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 26 treesize of output 25 [2021-08-27 04:42:01,507 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-27 04:42:01,508 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 35 treesize of output 23 [2021-08-27 04:42:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:01,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010504769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:01,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:01,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-27 04:42:01,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63271307] [2021-08-27 04:42:01,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-27 04:42:01,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-27 04:42:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-27 04:42:01,530 INFO L87 Difference]: Start difference. First operand 182 states and 215 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,279 INFO L93 Difference]: Finished difference Result 297 states and 342 transitions. [2021-08-27 04:42:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:42:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 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 04:42:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,280 INFO L225 Difference]: With dead ends: 297 [2021-08-27 04:42:02,281 INFO L226 Difference]: Without dead ends: 246 [2021-08-27 04:42:02,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-08-27 04:42:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-08-27 04:42:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 234. [2021-08-27 04:42:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.1981981981981982) internal successors, (266), 226 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 273 transitions. [2021-08-27 04:42:02,284 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 273 transitions. Word has length 43 [2021-08-27 04:42:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,285 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 273 transitions. [2021-08-27 04:42:02,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 20 states have internal predecessors, (64), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 273 transitions. [2021-08-27 04:42:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:42:02,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,285 INFO L512 BasicCegarLoop]: trace histogram [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 04:42:02,302 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 04:42:02,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:02,500 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash 51080568, now seen corresponding path program 3 times [2021-08-27 04:42:02,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780574722] [2021-08-27 04:42:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:02,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:02,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780574722] [2021-08-27 04:42:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780574722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:02,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526842790] [2021-08-27 04:42:02,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:02,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:02,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:02,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:42:02,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:42:02,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-27 04:42:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:02,941 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:02,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:03,295 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 04:42:04,038 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-08-27 04:42:04,038 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 40 treesize of output 35 [2021-08-27 04:42:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:04,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526842790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:04,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:04,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-08-27 04:42:04,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470009433] [2021-08-27 04:42:04,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-27 04:42:04,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-27 04:42:04,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-08-27 04:42:04,195 INFO L87 Difference]: Start difference. First operand 234 states and 273 transitions. Second operand has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:06,173 INFO L93 Difference]: Finished difference Result 412 states and 465 transitions. [2021-08-27 04:42:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:42:06,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 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 47 [2021-08-27 04:42:06,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:06,175 INFO L225 Difference]: With dead ends: 412 [2021-08-27 04:42:06,175 INFO L226 Difference]: Without dead ends: 412 [2021-08-27 04:42:06,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1472.3ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:42:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-27 04:42:06,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-08-27 04:42:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 284 states have (on average 1.2007042253521127) internal successors, (341), 288 states have internal predecessors, (341), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:06,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 348 transitions. [2021-08-27 04:42:06,180 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 348 transitions. Word has length 47 [2021-08-27 04:42:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:06,180 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 348 transitions. [2021-08-27 04:42:06,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.608695652173913) internal successors, (83), 22 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 348 transitions. [2021-08-27 04:42:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:42:06,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:06,181 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:06,204 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 04:42:06,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:06,401 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcspnErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -608435781, now seen corresponding path program 3 times [2021-08-27 04:42:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:06,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288506815] [2021-08-27 04:42:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:06,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:06,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:06,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288506815] [2021-08-27 04:42:06,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288506815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:06,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756111492] [2021-08-27 04:42:06,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:06,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:06,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:06,683 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:06,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:42:07,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:42:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:07,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-27 04:42:07,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:07,061 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:07,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-27 04:42:07,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 04:42:07,724 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-08-27 04:42:07,725 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 27 treesize of output 24 [2021-08-27 04:42:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-27 04:42:07,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756111492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:07,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:07,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 32 [2021-08-27 04:42:07,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087182002] [2021-08-27 04:42:07,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:42:07,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:42:07,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:07,787 INFO L87 Difference]: Start difference. First operand 296 states and 348 transitions. Second operand has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:11,477 INFO L93 Difference]: Finished difference Result 548 states and 604 transitions. [2021-08-27 04:42:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-27 04:42:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-27 04:42:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:11,478 INFO L225 Difference]: With dead ends: 548 [2021-08-27 04:42:11,478 INFO L226 Difference]: Without dead ends: 476 [2021-08-27 04:42:11,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 2920.7ms TimeCoverageRelationStatistics Valid=1037, Invalid=7335, Unknown=0, NotChecked=0, Total=8372 [2021-08-27 04:42:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-27 04:42:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 269. [2021-08-27 04:42:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 260 states have (on average 1.15) internal successors, (299), 261 states have internal predecessors, (299), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 306 transitions. [2021-08-27 04:42:11,485 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 306 transitions. Word has length 51 [2021-08-27 04:42:11,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:11,485 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 306 transitions. [2021-08-27 04:42:11,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 29 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:11,485 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 306 transitions. [2021-08-27 04:42:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 04:42:11,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:11,486 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:11,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:11,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 04:42:11,701 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:11,701 INFO L82 PathProgramCache]: Analyzing trace with hash 988427292, now seen corresponding path program 4 times [2021-08-27 04:42:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:11,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621994723] [2021-08-27 04:42:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:11,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:11,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:11,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:11,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621994723] [2021-08-27 04:42:11,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621994723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:11,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165833157] [2021-08-27 04:42:11,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:11,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:11,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:11,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:42:12,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:12,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 04:42:12,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:42:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:12,605 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:42:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:42:14,030 INFO L354 Elim1Store]: treesize reduction 120, result has 12.4 percent of original size [2021-08-27 04:42:14,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 55 [2021-08-27 04:42:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165833157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:14,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:14,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 29 [2021-08-27 04:42:14,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984320193] [2021-08-27 04:42:14,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:14,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:14,059 INFO L87 Difference]: Start difference. First operand 269 states and 306 transitions. Second operand has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:22,426 INFO L93 Difference]: Finished difference Result 453 states and 508 transitions. [2021-08-27 04:42:22,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:42:22,427 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 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 04:42:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:22,428 INFO L225 Difference]: With dead ends: 453 [2021-08-27 04:42:22,428 INFO L226 Difference]: Without dead ends: 283 [2021-08-27 04:42:22,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 8290.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2021-08-27 04:42:22,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-08-27 04:42:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 277. [2021-08-27 04:42:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 268 states have (on average 1.1455223880597014) internal successors, (307), 269 states have internal predecessors, (307), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 314 transitions. [2021-08-27 04:42:22,432 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 314 transitions. Word has length 58 [2021-08-27 04:42:22,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:22,433 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 314 transitions. [2021-08-27 04:42:22,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.392857142857143) internal successors, (95), 26 states have internal predecessors, (95), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:22,433 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 314 transitions. [2021-08-27 04:42:22,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 04:42:22,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:22,434 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:22,452 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 04:42:22,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 04:42:22,641 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:22,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:22,642 INFO L82 PathProgramCache]: Analyzing trace with hash 39819769, now seen corresponding path program 5 times [2021-08-27 04:42:22,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:22,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846162162] [2021-08-27 04:42:22,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:22,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:22,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:22,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846162162] [2021-08-27 04:42:22,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846162162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:22,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634623244] [2021-08-27 04:42:22,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:22,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:22,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:22,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:22,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:42:23,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:42:23,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:23,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:42:23,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:23,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634623244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:23,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:23,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-08-27 04:42:23,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643924636] [2021-08-27 04:42:23,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 04:42:23,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 04:42:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:42:23,653 INFO L87 Difference]: Start difference. First operand 277 states and 314 transitions. Second operand has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:24,167 INFO L93 Difference]: Finished difference Result 395 states and 448 transitions. [2021-08-27 04:42:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:42:24,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 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 62 [2021-08-27 04:42:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:24,169 INFO L225 Difference]: With dead ends: 395 [2021-08-27 04:42:24,169 INFO L226 Difference]: Without dead ends: 395 [2021-08-27 04:42:24,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-27 04:42:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-27 04:42:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 342. [2021-08-27 04:42:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 333 states have (on average 1.1411411411411412) internal successors, (380), 334 states have internal predecessors, (380), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 387 transitions. [2021-08-27 04:42:24,174 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 387 transitions. Word has length 62 [2021-08-27 04:42:24,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 387 transitions. [2021-08-27 04:42:24,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.45) internal successors, (89), 18 states have internal predecessors, (89), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 387 transitions. [2021-08-27 04:42:24,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-27 04:42:24,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:24,176 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:24,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:24,396 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,SelfDestructingSolverStorable27 [2021-08-27 04:42:24,397 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:24,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2012816133, now seen corresponding path program 6 times [2021-08-27 04:42:24,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:24,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600913912] [2021-08-27 04:42:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:24,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:24,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:24,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600913912] [2021-08-27 04:42:24,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600913912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:24,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863436707] [2021-08-27 04:42:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:24,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:24,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:24,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:24,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:42:25,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:42:25,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-27 04:42:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:25,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-27 04:42:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:25,503 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:42:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:42:26,451 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:42:26,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:42:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:26,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863436707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:26,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:26,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-08-27 04:42:26,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741085942] [2021-08-27 04:42:26,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:26,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:26,473 INFO L87 Difference]: Start difference. First operand 342 states and 387 transitions. Second operand has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:43,753 INFO L93 Difference]: Finished difference Result 591 states and 662 transitions. [2021-08-27 04:42:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 04:42:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 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 73 [2021-08-27 04:42:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:43,754 INFO L225 Difference]: With dead ends: 591 [2021-08-27 04:42:43,755 INFO L226 Difference]: Without dead ends: 356 [2021-08-27 04:42:43,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 16847.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-08-27 04:42:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-27 04:42:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2021-08-27 04:42:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 341 states have (on average 1.1378299120234605) internal successors, (388), 342 states have internal predecessors, (388), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 395 transitions. [2021-08-27 04:42:43,759 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 395 transitions. Word has length 73 [2021-08-27 04:42:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:43,760 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 395 transitions. [2021-08-27 04:42:43,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.392857142857143) internal successors, (123), 26 states have internal predecessors, (123), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 395 transitions. [2021-08-27 04:42:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-27 04:42:43,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:43,761 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:43,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:43,961 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,SelfDestructingSolverStorable28 [2021-08-27 04:42:43,961 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1889050242, now seen corresponding path program 7 times [2021-08-27 04:42:43,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:43,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183355154] [2021-08-27 04:42:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:43,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:44,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:44,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:44,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183355154] [2021-08-27 04:42:44,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183355154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:44,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151713129] [2021-08-27 04:42:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:44,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:44,151 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:44,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:42:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 04:42:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:44,817 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:44,817 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 13 treesize of output 18 [2021-08-27 04:42:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:46,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151713129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:46,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:46,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2021-08-27 04:42:46,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202405806] [2021-08-27 04:42:46,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:46,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:46,389 INFO L87 Difference]: Start difference. First operand 350 states and 395 transitions. Second operand has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:48,077 INFO L93 Difference]: Finished difference Result 541 states and 602 transitions. [2021-08-27 04:42:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-27 04:42:48,084 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-08-27 04:42:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:48,085 INFO L225 Difference]: With dead ends: 541 [2021-08-27 04:42:48,085 INFO L226 Difference]: Without dead ends: 541 [2021-08-27 04:42:48,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 946.0ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 04:42:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-08-27 04:42:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 415. [2021-08-27 04:42:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 406 states have (on average 1.1354679802955665) internal successors, (461), 407 states have internal predecessors, (461), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 468 transitions. [2021-08-27 04:42:48,092 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 468 transitions. Word has length 77 [2021-08-27 04:42:48,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:48,092 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 468 transitions. [2021-08-27 04:42:48,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.107142857142857) internal successors, (143), 26 states have internal predecessors, (143), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:42:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 468 transitions. [2021-08-27 04:42:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-27 04:42:48,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:48,094 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:42:48,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:48,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:48,305 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:42:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2004328534, now seen corresponding path program 8 times [2021-08-27 04:42:48,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:48,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117798741] [2021-08-27 04:42:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:48,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:48,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:48,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:48,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117798741] [2021-08-27 04:42:48,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117798741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:48,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259191386] [2021-08-27 04:42:48,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:48,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:48,583 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 04:42:48,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:42:49,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:49,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-27 04:42:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:49,361 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 04:42:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-27 04:42:49,684 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:42:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-27 04:42:50,830 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:42:50,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-27 04:42:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:42:50,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259191386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:50,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:50,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-27 04:42:50,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967012465] [2021-08-27 04:42:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:42:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:42:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:42:50,853 INFO L87 Difference]: Start difference. First operand 415 states and 468 transitions. Second operand has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:13,260 INFO L93 Difference]: Finished difference Result 729 states and 816 transitions. [2021-08-27 04:43:13,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:43:13,261 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 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 88 [2021-08-27 04:43:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:13,262 INFO L225 Difference]: With dead ends: 729 [2021-08-27 04:43:13,262 INFO L226 Difference]: Without dead ends: 429 [2021-08-27 04:43:13,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 21546.7ms TimeCoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:43:13,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-08-27 04:43:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 423. [2021-08-27 04:43:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 414 states have (on average 1.1328502415458936) internal successors, (469), 415 states have internal predecessors, (469), 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 04:43:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 476 transitions. [2021-08-27 04:43:13,267 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 476 transitions. Word has length 88 [2021-08-27 04:43:13,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:13,268 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 476 transitions. [2021-08-27 04:43:13,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.78125) internal successors, (153), 30 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:43:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 476 transitions. [2021-08-27 04:43:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-27 04:43:13,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:13,269 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:13,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 04:43:13,476 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,SelfDestructingSolverStorable30 [2021-08-27 04:43:13,477 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcspnErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 14 more)] === [2021-08-27 04:43:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1747133811, now seen corresponding path program 9 times [2021-08-27 04:43:13,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:13,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542756033] [2021-08-27 04:43:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:13,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:13,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:43:13,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:13,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542756033] [2021-08-27 04:43:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542756033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:13,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955101149] [2021-08-27 04:43:13,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:13,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:13,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:13,687 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 04:43:13,688 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 04:43:14,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:43:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-27 04:43:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:14,548 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 04:43:14,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-27 04:43:14,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 04:43:14,879 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:43:14,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-08-27 04:43:18,446 INFO L354 Elim1Store]: treesize reduction 79, result has 20.2 percent of original size [2021-08-27 04:43:18,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 43 [2021-08-27 04:43:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-08-27 04:43:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955101149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:18,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:18,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2021-08-27 04:43:18,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319091181] [2021-08-27 04:43:18,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-27 04:43:18,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-27 04:43:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:43:18,516 INFO L87 Difference]: Start difference. First operand 423 states and 476 transitions. Second operand has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:44:50,868 WARN L207 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-08-27 04:45:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:45:17,907 INFO L93 Difference]: Finished difference Result 780 states and 867 transitions. [2021-08-27 04:45:17,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-27 04:45:17,907 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 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 92 [2021-08-27 04:45:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:45:17,908 INFO L225 Difference]: With dead ends: 780 [2021-08-27 04:45:17,908 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:45:17,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4144 ImplicationChecksByTransitivity, 108172.6ms TimeCoverageRelationStatistics Valid=1465, Invalid=13295, Unknown=2, NotChecked=0, Total=14762 [2021-08-27 04:45:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:45:17,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:45:17,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 04:45:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:45:17,911 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 92 [2021-08-27 04:45:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:45:17,911 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:45:17,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 4.133333333333334) internal successors, (124), 29 states have internal predecessors, (124), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 04:45:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:45:17,911 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:45:17,913 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:45:17,913 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:45:17,914 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr0REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr1REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr2REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr3REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr4REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr5REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr6REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr7REQUIRES_VIOLATION [2021-08-27 04:45:17,915 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr8REQUIRES_VIOLATION [2021-08-27 04:45:17,916 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcspnErr9REQUIRES_VIOLATION [2021-08-27 04:45:17,936 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 04:45:18,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:45:18,138 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:45:18,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:45:18 BoogieIcfgContainer [2021-08-27 04:45:18,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:45:18,140 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:45:18,140 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:45:18,140 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:45:18,141 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:49" (3/4) ... [2021-08-27 04:45:18,143 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:45:18,147 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:45:18,147 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcspn [2021-08-27 04:45:18,147 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:45:18,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:45:18,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:45:18,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:45:18,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:45:18,148 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:45:18,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-27 04:45:18,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 04:45:18,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:45:18,151 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:45:18,185 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:45:18,186 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:45:18,186 INFO L168 Benchmark]: Toolchain (without parser) took 209428.43 ms. Allocated memory was 67.1 MB in the beginning and 297.8 MB in the end (delta: 230.7 MB). Free memory was 46.2 MB in the beginning and 94.7 MB in the end (delta: -48.5 MB). Peak memory consumption was 182.0 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,187 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:45:18,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 356.20 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 44.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,187 INFO L168 Benchmark]: Boogie Preprocessor took 68.25 ms. Allocated memory is still 67.1 MB. Free memory was 44.0 MB in the beginning and 41.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,187 INFO L168 Benchmark]: RCFGBuilder took 479.11 ms. Allocated memory was 67.1 MB in the beginning and 88.1 MB in the end (delta: 21.0 MB). Free memory was 41.5 MB in the beginning and 56.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,189 INFO L168 Benchmark]: TraceAbstraction took 208474.46 ms. Allocated memory was 88.1 MB in the beginning and 297.8 MB in the end (delta: 209.7 MB). Free memory was 56.1 MB in the beginning and 98.5 MB in the end (delta: -42.4 MB). Peak memory consumption was 167.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,189 INFO L168 Benchmark]: Witness Printer took 45.59 ms. Allocated memory is still 297.8 MB. Free memory was 98.5 MB in the beginning and 94.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:45:18,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 48.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 356.20 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 44.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.25 ms. Allocated memory is still 67.1 MB. Free memory was 44.0 MB in the beginning and 41.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 479.11 ms. Allocated memory was 67.1 MB in the beginning and 88.1 MB in the end (delta: 21.0 MB). Free memory was 41.5 MB in the beginning and 56.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 208474.46 ms. Allocated memory was 88.1 MB in the beginning and 297.8 MB in the end (delta: 209.7 MB). Free memory was 56.1 MB in the beginning and 98.5 MB in the end (delta: -42.4 MB). Peak memory consumption was 167.3 MB. Max. memory is 16.1 GB. * Witness Printer took 45.59 ms. Allocated memory is still 297.8 MB. Free memory was 98.5 MB in the beginning and 94.7 MB in the end (delta: 3.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 549]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 553]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 208427.1ms, OverallIterations: 32, TraceHistogramMax: 5, EmptinessCheckTime: 22.7ms, AutomataDifference: 181050.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1315 SDtfs, 5210 SDslu, 3192 SDs, 0 SdLazy, 21126 SolverSat, 675 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 21648.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1385 GetRequests, 654 SyntacticMatches, 11 SemanticMatches, 720 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8932 ImplicationChecksByTransitivity, 163611.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred in iteration=31, InterpolantAutomatonStates: 486, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 151.4ms AutomataMinimizationTime, 32 MinimizatonAttempts, 814 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 144.1ms SsaConstructionTime, 606.4ms SatisfiabilityAnalysisTime, 18382.4ms InterpolantComputationTime, 1801 NumberOfCodeBlocks, 1798 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1755 ConstructedInterpolants, 286 QuantifiedInterpolants, 20907 SizeOfPredicates, 165 NumberOfNonLiveVariables, 3013 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 46 InterpolantComputations, 18 PerfectInterpolantSequences, 443/1325 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 04:45:18,400 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-27 04:45:18,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...