./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cff20f2f9db1407772cc4ac909fa32770d83e71 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... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:22:10,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:22:10,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:22:11,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:22:11,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:22:11,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:22:11,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:22:11,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:22:11,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:22:11,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:22:11,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:22:11,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:22:11,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:22:11,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:22:11,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:22:11,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:22:11,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:22:11,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:22:11,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:22:11,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:22:11,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:22:11,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:22:11,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:22:11,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:22:11,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:22:11,077 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:22:11,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:22:11,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:22:11,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:22:11,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:22:11,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:22:11,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:22:11,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:22:11,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:22:11,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:22:11,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:22:11,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:22:11,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:22:11,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:22:11,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:22:11,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:22:11,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:22:11,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:22:11,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:22:11,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:22:11,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:22:11,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:22:11,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:22:11,118 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:22:11,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:22:11,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:22:11,119 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:22:11,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:22:11,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:22:11,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:22:11,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:22:11,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:22:11,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:22:11,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:22:11,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:22:11,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:22:11,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cff20f2f9db1407772cc4ac909fa32770d83e71 [2021-08-30 16:22:11,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:22:11,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:22:11,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:22:11,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:22:11,422 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:22:11,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-08-30 16:22:11,467 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993818dcb/4487274073144fb5b138c6360c3d1d8f/FLAG2329f1df5 [2021-08-30 16:22:11,872 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:22:11,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-08-30 16:22:11,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993818dcb/4487274073144fb5b138c6360c3d1d8f/FLAG2329f1df5 [2021-08-30 16:22:11,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/993818dcb/4487274073144fb5b138c6360c3d1d8f [2021-08-30 16:22:11,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:22:11,901 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:22:11,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:22:11,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:22:11,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:22:11,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:22:11" (1/1) ... [2021-08-30 16:22:11,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53cd55d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:11, skipping insertion in model container [2021-08-30 16:22:11,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:22:11" (1/1) ... [2021-08-30 16:22:11,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:22:11,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:22:12,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:22:12,084 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:22:12,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:22:12,145 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:22:12,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12 WrapperNode [2021-08-30 16:22:12,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:22:12,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:22:12,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:22:12,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:22:12,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:22:12,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:22:12,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:22:12,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:22:12,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (1/1) ... [2021-08-30 16:22:12,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:22:12,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:12,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 16:22:12,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 16:22:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:22:12,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:22:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:22:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:22:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:22:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:22:12,260 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:22:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-08-30 16:22:12,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:22:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:22:12,261 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:22:12,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:22:12,263 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:22:12,264 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:22:12,265 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:22:12,266 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:22:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:22:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:22:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:22:12,267 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:22:12,268 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:22:12,269 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:22:12,270 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:22:12,270 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:22:12,270 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:22:12,271 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:22:12,272 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:22:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:22:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:22:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:22:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:22:12,273 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:22:12,274 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:22:12,275 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:22:12,276 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:22:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:22:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:22:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:22:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:22:12,277 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:22:12,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:22:12,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:22:12,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:22:12,556 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-30 16:22:12,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:12 BoogieIcfgContainer [2021-08-30 16:22:12,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:22:12,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:22:12,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:22:12,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:22:12,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:22:11" (1/3) ... [2021-08-30 16:22:12,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7472e8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:22:12, skipping insertion in model container [2021-08-30 16:22:12,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:22:12" (2/3) ... [2021-08-30 16:22:12,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7472e8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:22:12, skipping insertion in model container [2021-08-30 16:22:12,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:12" (3/3) ... [2021-08-30 16:22:12,566 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2021-08-30 16:22:12,573 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:22:12,573 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-30 16:22:12,600 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:22:12,607 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 16:22:12,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-30 16:22:12,620 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) [2021-08-30 16:22:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:22:12,627 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:12,628 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:12,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1363313202, now seen corresponding path program 1 times [2021-08-30 16:22:12,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:12,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222907567] [2021-08-30 16:22:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:12,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:12,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:12,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:12,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222907567] [2021-08-30 16:22:12,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222907567] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:12,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:12,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:22:12,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734113591] [2021-08-30 16:22:12,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:12,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:12,880 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) [2021-08-30 16:22:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:13,068 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-08-30 16:22:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:22:13,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:22:13,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:13,077 INFO L225 Difference]: With dead ends: 83 [2021-08-30 16:22:13,077 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 16:22:13,078 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.34ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:22:13,081 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.65ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:13,081 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 14 Invalid, 165 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 130.65ms Time] [2021-08-30 16:22:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 16:22:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-08-30 16:22:13,108 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) [2021-08-30 16:22:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-08-30 16:22:13,112 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-08-30 16:22:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:13,113 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-08-30 16:22:13,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:13,113 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-08-30 16:22:13,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:22:13,113 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:13,113 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:13,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:22:13,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:13,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:13,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1361466160, now seen corresponding path program 1 times [2021-08-30 16:22:13,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:13,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751599311] [2021-08-30 16:22:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:13,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:13,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:13,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751599311] [2021-08-30 16:22:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751599311] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:13,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:13,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:22:13,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365198072] [2021-08-30 16:22:13,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:22:13,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:13,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:22:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:22:13,209 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:13,296 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-08-30 16:22:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:22:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:22:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:13,300 INFO L225 Difference]: With dead ends: 60 [2021-08-30 16:22:13,300 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:22:13,300 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.18ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:22:13,303 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:13,304 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 8 Invalid, 128 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 76.57ms Time] [2021-08-30 16:22:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:22:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-30 16:22:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:22:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-08-30 16:22:13,317 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2021-08-30 16:22:13,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-08-30 16:22:13,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-08-30 16:22:13,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:22:13,318 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:13,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:13,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:22:13,318 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:13,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1361466159, now seen corresponding path program 1 times [2021-08-30 16:22:13,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:13,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318254459] [2021-08-30 16:22:13,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:13,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:13,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:13,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318254459] [2021-08-30 16:22:13,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318254459] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:13,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:13,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:22:13,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843583347] [2021-08-30 16:22:13,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:13,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:13,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:13,409 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:13,558 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-30 16:22:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:22:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:22:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:13,560 INFO L225 Difference]: With dead ends: 80 [2021-08-30 16:22:13,560 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 16:22:13,560 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.89ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:13,567 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:13,568 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 15 Invalid, 208 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 129.57ms Time] [2021-08-30 16:22:13,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 16:22:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-08-30 16:22:13,572 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) [2021-08-30 16:22:13,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-08-30 16:22:13,575 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-08-30 16:22:13,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:13,576 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-08-30 16:22:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-08-30 16:22:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:22:13,577 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:13,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:13,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:22:13,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:13,578 INFO L82 PathProgramCache]: Analyzing trace with hash -179010490, now seen corresponding path program 1 times [2021-08-30 16:22:13,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:13,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022636808] [2021-08-30 16:22:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:13,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:13,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:13,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:13,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022636808] [2021-08-30 16:22:13,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022636808] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:13,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:13,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:22:13,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680323484] [2021-08-30 16:22:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:13,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:13,644 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) [2021-08-30 16:22:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:13,727 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-30 16:22:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:22:13,728 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 [2021-08-30 16:22:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:13,729 INFO L225 Difference]: With dead ends: 61 [2021-08-30 16:22:13,729 INFO L226 Difference]: Without dead ends: 61 [2021-08-30 16:22:13,730 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.33ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:13,734 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 73 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.95ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:13,735 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 10 Invalid, 124 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 66.95ms Time] [2021-08-30 16:22:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-30 16:22:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-30 16:22:13,744 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) [2021-08-30 16:22:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-30 16:22:13,746 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-30 16:22:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:13,746 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-30 16:22:13,746 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) [2021-08-30 16:22:13,746 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-30 16:22:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:22:13,747 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:13,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:13,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:22:13,747 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:13,748 INFO L82 PathProgramCache]: Analyzing trace with hash -179010438, now seen corresponding path program 1 times [2021-08-30 16:22:13,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:13,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139301428] [2021-08-30 16:22:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:13,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:13,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:13,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139301428] [2021-08-30 16:22:13,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139301428] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:13,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:13,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:22:13,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949971537] [2021-08-30 16:22:13,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:13,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:13,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:13,796 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) [2021-08-30 16:22:13,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:13,890 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-30 16:22:13,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:22:13,891 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 [2021-08-30 16:22:13,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:13,892 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:22:13,892 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 16:22:13,894 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.07ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:13,895 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.81ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:13,895 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 12 Invalid, 152 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 79.81ms Time] [2021-08-30 16:22:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 16:22:13,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-30 16:22:13,905 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) [2021-08-30 16:22:13,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-08-30 16:22:13,906 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-08-30 16:22:13,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:13,906 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-08-30 16:22:13,907 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) [2021-08-30 16:22:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-08-30 16:22:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:22:13,907 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:13,907 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:13,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:22:13,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -121752136, now seen corresponding path program 1 times [2021-08-30 16:22:13,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:13,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589776222] [2021-08-30 16:22:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:13,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:13,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:13,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589776222] [2021-08-30 16:22:13,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589776222] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:13,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:13,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:22:13,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481486195] [2021-08-30 16:22:13,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:22:13,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:13,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:22:13,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:22:13,947 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) [2021-08-30 16:22:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:14,019 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-08-30 16:22:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:22:14,019 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 [2021-08-30 16:22:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:14,020 INFO L225 Difference]: With dead ends: 70 [2021-08-30 16:22:14,020 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:22:14,020 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.22ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:22:14,021 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:14,021 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 8 Invalid, 122 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 64.57ms Time] [2021-08-30 16:22:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:22:14,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-30 16:22:14,030 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) [2021-08-30 16:22:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-08-30 16:22:14,030 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-08-30 16:22:14,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:14,031 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-08-30 16:22:14,031 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) [2021-08-30 16:22:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-08-30 16:22:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:22:14,032 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:14,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:14,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:22:14,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:14,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:14,032 INFO L82 PathProgramCache]: Analyzing trace with hash -121752135, now seen corresponding path program 1 times [2021-08-30 16:22:14,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:14,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654074664] [2021-08-30 16:22:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:14,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:14,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:14,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654074664] [2021-08-30 16:22:14,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654074664] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:14,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:14,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:22:14,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733333192] [2021-08-30 16:22:14,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:22:14,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:22:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:14,112 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) [2021-08-30 16:22:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:14,220 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-08-30 16:22:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:22:14,221 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 [2021-08-30 16:22:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:14,221 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:22:14,222 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 16:22:14,222 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.51ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:22:14,222 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.97ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.89ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:14,223 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 16 Invalid, 237 Unknown, 0 Unchecked, 1.97ms Time], IncrementalHoareTripleChecker [4 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 95.89ms Time] [2021-08-30 16:22:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 16:22:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-30 16:22:14,225 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) [2021-08-30 16:22:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-08-30 16:22:14,226 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-08-30 16:22:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:14,226 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-08-30 16:22:14,226 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) [2021-08-30 16:22:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-08-30 16:22:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:22:14,227 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:14,227 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:14,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 16:22:14,227 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:14,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1254357838, now seen corresponding path program 1 times [2021-08-30 16:22:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:14,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164000929] [2021-08-30 16:22:14,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:14,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:14,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:14,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164000929] [2021-08-30 16:22:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164000929] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:14,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:14,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:22:14,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374113801] [2021-08-30 16:22:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:14,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:14,263 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) [2021-08-30 16:22:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:14,348 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-08-30 16:22:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:22:14,349 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 [2021-08-30 16:22:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:14,349 INFO L225 Difference]: With dead ends: 71 [2021-08-30 16:22:14,349 INFO L226 Difference]: Without dead ends: 71 [2021-08-30 16:22:14,350 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.69ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:14,351 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.32ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:14,351 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 10 Invalid, 118 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 76.32ms Time] [2021-08-30 16:22:14,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-30 16:22:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-30 16:22:14,353 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) [2021-08-30 16:22:14,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-08-30 16:22:14,354 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-08-30 16:22:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-08-30 16:22:14,355 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) [2021-08-30 16:22:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-08-30 16:22:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:22:14,356 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:14,356 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:14,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:22:14,356 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:14,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:14,357 INFO L82 PathProgramCache]: Analyzing trace with hash 498238100, now seen corresponding path program 1 times [2021-08-30 16:22:14,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:14,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953575979] [2021-08-30 16:22:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:14,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:14,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:14,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953575979] [2021-08-30 16:22:14,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953575979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:14,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156940868] [2021-08-30 16:22:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:14,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:14,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:22:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 16:22:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:14,637 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:22:14,637 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 [2021-08-30 16:22:14,641 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 [2021-08-30 16:22:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:14,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156940868] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:14,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:14,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:22:14,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584968536] [2021-08-30 16:22:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:22:14,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:22:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:22:14,913 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:15,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:15,097 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2021-08-30 16:22:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:22:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 16:22:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:15,103 INFO L225 Difference]: With dead ends: 108 [2021-08-30 16:22:15,103 INFO L226 Difference]: Without dead ends: 108 [2021-08-30 16:22:15,104 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 83.73ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:22:15,105 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:15,105 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 19 Invalid, 368 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [20 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 147.96ms Time] [2021-08-30 16:22:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-30 16:22:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-08-30 16:22:15,107 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) [2021-08-30 16:22:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-08-30 16:22:15,108 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-08-30 16:22:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:15,108 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-08-30 16:22:15,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-08-30 16:22:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:22:15,111 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:15,111 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:15,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:15,315 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 [2021-08-30 16:22:15,315 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:15,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1936156247, now seen corresponding path program 1 times [2021-08-30 16:22:15,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:15,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820427949] [2021-08-30 16:22:15,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:15,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:15,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:15,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820427949] [2021-08-30 16:22:15,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820427949] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:15,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:15,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:22:15,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601143496] [2021-08-30 16:22:15,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:22:15,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:22:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:22:15,343 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) [2021-08-30 16:22:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:15,422 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-30 16:22:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:22:15,423 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 [2021-08-30 16:22:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:15,423 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:22:15,423 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:22:15,423 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.01ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:22:15,424 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:15,424 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 14 Invalid, 169 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 65.71ms Time] [2021-08-30 16:22:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:22:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-30 16:22:15,426 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) [2021-08-30 16:22:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-30 16:22:15,426 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-30 16:22:15,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:15,427 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-30 16:22:15,427 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) [2021-08-30 16:22:15,428 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-30 16:22:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:22:15,428 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:15,429 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:22:15,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1936156248, now seen corresponding path program 1 times [2021-08-30 16:22:15,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:15,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771265303] [2021-08-30 16:22:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:15,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:15,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:15,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771265303] [2021-08-30 16:22:15,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771265303] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:15,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:22:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321305343] [2021-08-30 16:22:15,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:22:15,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:22:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:22:15,502 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) [2021-08-30 16:22:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:15,667 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-08-30 16:22:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:22:15,667 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 [2021-08-30 16:22:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:15,669 INFO L225 Difference]: With dead ends: 86 [2021-08-30 16:22:15,669 INFO L226 Difference]: Without dead ends: 86 [2021-08-30 16:22:15,669 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.45ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:22:15,669 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.32ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.62ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:15,670 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 18 Invalid, 236 Unknown, 0 Unchecked, 1.32ms Time], IncrementalHoareTripleChecker [14 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 125.62ms Time] [2021-08-30 16:22:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-30 16:22:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-08-30 16:22:15,671 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) [2021-08-30 16:22:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-30 16:22:15,672 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-08-30 16:22:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:15,672 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-30 16:22:15,672 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) [2021-08-30 16:22:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-30 16:22:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:22:15,672 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:15,672 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:15,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-30 16:22:15,673 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1591790588, now seen corresponding path program 1 times [2021-08-30 16:22:15,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:15,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777414572] [2021-08-30 16:22:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:15,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:15,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:15,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777414572] [2021-08-30 16:22:15,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777414572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:15,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172817183] [2021-08-30 16:22:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:15,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:15,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:15,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:15,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:22:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:22:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:15,881 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:22:15,881 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 [2021-08-30 16:22:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:16,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172817183] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:16,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:16,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-08-30 16:22:16,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882874304] [2021-08-30 16:22:16,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:22:16,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:16,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:22:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:22:16,089 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:16,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:16,329 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-08-30 16:22:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:22:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 [2021-08-30 16:22:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:16,330 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:22:16,330 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 16:22:16,330 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 111.90ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-30 16:22:16,330 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 187.73ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:16,330 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 31 Invalid, 470 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [19 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 187.73ms Time] [2021-08-30 16:22:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 16:22:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-08-30 16:22:16,332 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) [2021-08-30 16:22:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-30 16:22:16,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-08-30 16:22:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:16,332 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-30 16:22:16,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-30 16:22:16,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:22:16,333 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:16,333 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:16,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:16,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-30 16:22:16,533 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash 168377437, now seen corresponding path program 1 times [2021-08-30 16:22:16,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:16,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055770858] [2021-08-30 16:22:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:16,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:16,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:16,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055770858] [2021-08-30 16:22:16,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055770858] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:16,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:16,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:22:16,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441164435] [2021-08-30 16:22:16,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:22:16,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:22:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:22:16,566 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) [2021-08-30 16:22:16,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:16,664 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-30 16:22:16,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:22:16,665 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 [2021-08-30 16:22:16,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:16,665 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:22:16,665 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:22:16,666 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.29ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:22:16,666 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.34ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:16,666 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 17 Invalid, 206 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 75.34ms Time] [2021-08-30 16:22:16,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:22:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-08-30 16:22:16,667 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) [2021-08-30 16:22:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-08-30 16:22:16,668 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-08-30 16:22:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:16,668 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-08-30 16:22:16,668 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) [2021-08-30 16:22:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-08-30 16:22:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:22:16,669 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:16,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:16,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 16:22:16,669 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash 168377438, now seen corresponding path program 1 times [2021-08-30 16:22:16,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:16,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373689167] [2021-08-30 16:22:16,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:16,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:16,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:16,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373689167] [2021-08-30 16:22:16,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373689167] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:16,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:16,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:22:16,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515794926] [2021-08-30 16:22:16,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:22:16,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:22:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:22:16,737 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) [2021-08-30 16:22:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:16,924 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-08-30 16:22:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:22:16,924 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 [2021-08-30 16:22:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:16,924 INFO L225 Difference]: With dead ends: 76 [2021-08-30 16:22:16,924 INFO L226 Difference]: Without dead ends: 76 [2021-08-30 16:22:16,925 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.24ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:22:16,925 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 160 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.75ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:16,925 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 25 Invalid, 295 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 135.75ms Time] [2021-08-30 16:22:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-30 16:22:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-08-30 16:22:16,926 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) [2021-08-30 16:22:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-08-30 16:22:16,927 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-08-30 16:22:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:16,927 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-08-30 16:22:16,927 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) [2021-08-30 16:22:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-08-30 16:22:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:22:16,927 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:16,927 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:16,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 16:22:16,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1415217207, now seen corresponding path program 1 times [2021-08-30 16:22:16,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:16,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412903043] [2021-08-30 16:22:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:16,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-30 16:22:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:16,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:16,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412903043] [2021-08-30 16:22:16,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412903043] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:16,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:16,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:22:16,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116440471] [2021-08-30 16:22:16,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:22:16,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:22:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:16,963 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) [2021-08-30 16:22:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:17,013 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-08-30 16:22:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:22:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-08-30 16:22:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:17,014 INFO L225 Difference]: With dead ends: 67 [2021-08-30 16:22:17,014 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 16:22:17,014 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.72ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:17,014 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.44ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.12ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:17,014 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 6 Invalid, 106 Unknown, 0 Unchecked, 0.44ms Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 47.12ms Time] [2021-08-30 16:22:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 16:22:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 16:22:17,016 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) [2021-08-30 16:22:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-30 16:22:17,016 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-08-30 16:22:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:17,016 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-30 16:22:17,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:22:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-30 16:22:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-30 16:22:17,016 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:17,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 16:22:17,017 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash 808083893, now seen corresponding path program 1 times [2021-08-30 16:22:17,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:17,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630371833] [2021-08-30 16:22:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:17,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:17,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:17,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630371833] [2021-08-30 16:22:17,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630371833] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:17,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:17,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:22:17,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350673922] [2021-08-30 16:22:17,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:22:17,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:22:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:22:17,037 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) [2021-08-30 16:22:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:17,083 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-08-30 16:22:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:22:17,083 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 [2021-08-30 16:22:17,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:17,084 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:22:17,084 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:22:17,084 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.20ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:22:17,084 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.28ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:17,084 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 9 Invalid, 102 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 39.28ms Time] [2021-08-30 16:22:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:22:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-30 16:22:17,085 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) [2021-08-30 16:22:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-08-30 16:22:17,086 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-08-30 16:22:17,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:17,086 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-08-30 16:22:17,086 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) [2021-08-30 16:22:17,086 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-08-30 16:22:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 16:22:17,086 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:17,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:17,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 16:22:17,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash -826319086, now seen corresponding path program 1 times [2021-08-30 16:22:17,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:17,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503263008] [2021-08-30 16:22:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:17,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:17,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:17,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503263008] [2021-08-30 16:22:17,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503263008] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:17,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:17,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-30 16:22:17,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287707244] [2021-08-30 16:22:17,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:22:17,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:22:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:22:17,173 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) [2021-08-30 16:22:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:17,350 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-08-30 16:22:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-30 16:22:17,351 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 [2021-08-30 16:22:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:17,351 INFO L225 Difference]: With dead ends: 77 [2021-08-30 16:22:17,351 INFO L226 Difference]: Without dead ends: 59 [2021-08-30 16:22:17,351 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.19ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:22:17,351 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 124.99ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:17,352 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 317 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 124.99ms Time] [2021-08-30 16:22:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-30 16:22:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-30 16:22:17,353 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) [2021-08-30 16:22:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-08-30 16:22:17,353 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-08-30 16:22:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:17,353 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-08-30 16:22:17,353 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) [2021-08-30 16:22:17,353 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-08-30 16:22:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 16:22:17,354 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:17,354 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:17,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 16:22:17,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:17,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash -403617260, now seen corresponding path program 1 times [2021-08-30 16:22:17,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:17,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125595453] [2021-08-30 16:22:17,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:17,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:17,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:17,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125595453] [2021-08-30 16:22:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125595453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:17,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:17,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-30 16:22:17,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005105579] [2021-08-30 16:22:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:22:17,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:22:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:22:17,448 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) [2021-08-30 16:22:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:17,608 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-08-30 16:22:17,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:22:17,608 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 [2021-08-30 16:22:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:17,609 INFO L225 Difference]: With dead ends: 80 [2021-08-30 16:22:17,609 INFO L226 Difference]: Without dead ends: 67 [2021-08-30 16:22:17,609 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 76.91ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:22:17,609 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 116.30ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:17,609 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 26 Invalid, 311 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [6 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 116.30ms Time] [2021-08-30 16:22:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-30 16:22:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-08-30 16:22:17,611 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) [2021-08-30 16:22:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-08-30 16:22:17,611 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-08-30 16:22:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:17,611 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-08-30 16:22:17,611 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) [2021-08-30 16:22:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-08-30 16:22:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 16:22:17,611 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:17,611 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 16:22:17,612 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1843673559, now seen corresponding path program 1 times [2021-08-30 16:22:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:17,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682587225] [2021-08-30 16:22:17,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:17,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:17,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:17,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682587225] [2021-08-30 16:22:17,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682587225] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:17,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:17,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-30 16:22:17,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286481746] [2021-08-30 16:22:17,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 16:22:17,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:17,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 16:22:17,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:22:17,732 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) [2021-08-30 16:22:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:17,962 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-08-30 16:22:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 16:22:17,962 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 [2021-08-30 16:22:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:17,963 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:22:17,963 INFO L226 Difference]: Without dead ends: 81 [2021-08-30 16:22:17,963 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 116.04ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-30 16:22:17,963 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 83 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.07ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 151.47ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:17,963 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 33 Invalid, 409 Unknown, 0 Unchecked, 2.07ms Time], IncrementalHoareTripleChecker [10 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 151.47ms Time] [2021-08-30 16:22:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-30 16:22:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-08-30 16:22:17,969 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) [2021-08-30 16:22:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-08-30 16:22:17,970 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-08-30 16:22:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:17,970 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-08-30 16:22:17,970 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) [2021-08-30 16:22:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-08-30 16:22:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-30 16:22:17,970 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:17,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:17,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-30 16:22:17,971 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1709660053, now seen corresponding path program 1 times [2021-08-30 16:22:17,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:17,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557921739] [2021-08-30 16:22:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:17,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:18,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:18,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557921739] [2021-08-30 16:22:18,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557921739] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:18,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:18,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 16:22:18,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130486876] [2021-08-30 16:22:18,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 16:22:18,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 16:22:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:22:18,100 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) [2021-08-30 16:22:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:18,328 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-08-30 16:22:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:22:18,328 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 [2021-08-30 16:22:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:18,329 INFO L225 Difference]: With dead ends: 103 [2021-08-30 16:22:18,329 INFO L226 Difference]: Without dead ends: 103 [2021-08-30 16:22:18,329 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 127.69ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-30 16:22:18,329 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 99 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 143.44ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:18,329 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 33 Invalid, 409 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [12 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 143.44ms Time] [2021-08-30 16:22:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-30 16:22:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-08-30 16:22:18,331 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) [2021-08-30 16:22:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-08-30 16:22:18,331 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-08-30 16:22:18,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:18,331 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-08-30 16:22:18,332 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) [2021-08-30 16:22:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-08-30 16:22:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-30 16:22:18,332 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:18,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:18,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-30 16:22:18,332 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1499760060, now seen corresponding path program 1 times [2021-08-30 16:22:18,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:18,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664194824] [2021-08-30 16:22:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:18,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:18,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:18,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664194824] [2021-08-30 16:22:18,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664194824] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:22:18,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:22:18,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-30 16:22:18,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906472754] [2021-08-30 16:22:18,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 16:22:18,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:18,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 16:22:18,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:22:18,405 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:18,672 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-08-30 16:22:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:22:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-08-30 16:22:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:18,674 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:22:18,674 INFO L226 Difference]: Without dead ends: 56 [2021-08-30 16:22:18,674 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 151.44ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-30 16:22:18,675 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.14ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:18,675 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 37 Invalid, 378 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [15 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 147.14ms Time] [2021-08-30 16:22:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-30 16:22:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-30 16:22:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-08-30 16:22:18,676 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-08-30 16:22:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:18,676 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-08-30 16:22:18,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-08-30 16:22:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 16:22:18,676 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:18,677 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:18,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-30 16:22:18,677 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:18,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:18,677 INFO L82 PathProgramCache]: Analyzing trace with hash 385012248, now seen corresponding path program 1 times [2021-08-30 16:22:18,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:18,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81318968] [2021-08-30 16:22:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:18,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:18,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:18,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81318968] [2021-08-30 16:22:18,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81318968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:18,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315656628] [2021-08-30 16:22:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:18,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:18,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:18,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:18,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:22:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-30 16:22:18,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:19,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:22:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:19,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315656628] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:19,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2021-08-30 16:22:19,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932508321] [2021-08-30 16:22:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-30 16:22:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-30 16:22:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-30 16:22:19,184 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:19,454 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-08-30 16:22:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 16:22:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-30 16:22:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:19,456 INFO L225 Difference]: With dead ends: 74 [2021-08-30 16:22:19,456 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:22:19,457 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 259.31ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-08-30 16:22:19,457 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 273 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:19,457 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 43 Invalid, 553 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [33 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 182.76ms Time] [2021-08-30 16:22:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:22:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-08-30 16:22:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-30 16:22:19,459 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2021-08-30 16:22:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:19,459 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-30 16:22:19,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-30 16:22:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-30 16:22:19,459 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:19,459 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:19,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:19,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:19,660 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:19,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1958963042, now seen corresponding path program 1 times [2021-08-30 16:22:19,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:19,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105859719] [2021-08-30 16:22:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:19,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:19,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:19,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105859719] [2021-08-30 16:22:19,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105859719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:19,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339241295] [2021-08-30 16:22:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:19,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:19,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:19,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:19,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:22:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-30 16:22:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:19,875 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:22:19,876 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 [2021-08-30 16:22:19,879 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 [2021-08-30 16:22:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:20,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339241295] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:20,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:20,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2021-08-30 16:22:20,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163365684] [2021-08-30 16:22:20,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-30 16:22:20,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:20,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-30 16:22:20,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-30 16:22:20,278 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:20,554 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-08-30 16:22:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:22:20,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-08-30 16:22:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:20,554 INFO L225 Difference]: With dead ends: 91 [2021-08-30 16:22:20,554 INFO L226 Difference]: Without dead ends: 91 [2021-08-30 16:22:20,555 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 243.26ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:22:20,555 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 289 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 144.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 179.29ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:20,555 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 40 Invalid, 495 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [26 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 179.29ms Time] [2021-08-30 16:22:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-30 16:22:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2021-08-30 16:22:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-08-30 16:22:20,557 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 38 [2021-08-30 16:22:20,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:20,557 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-08-30 16:22:20,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-08-30 16:22:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-30 16:22:20,557 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:20,557 INFO L513 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] [2021-08-30 16:22:20,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:20,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:20,758 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash 950813004, now seen corresponding path program 2 times [2021-08-30 16:22:20,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:20,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630906133] [2021-08-30 16:22:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:20,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:20,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:20,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630906133] [2021-08-30 16:22:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630906133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964353998] [2021-08-30 16:22:20,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:22:20,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:20,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:20,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:22:21,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:22:21,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-30 16:22:21,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:21,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:22:21,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-30 16:22:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:21,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:21,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-08-30 16:22:21,718 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 32 treesize of output 28 [2021-08-30 16:22:21,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:21,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964353998] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:21,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:21,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2021-08-30 16:22:21,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960751719] [2021-08-30 16:22:21,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:22:21,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:21,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:22:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:22:21,945 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:22,406 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-08-30 16:22:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-30 16:22:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-08-30 16:22:22,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:22,407 INFO L225 Difference]: With dead ends: 112 [2021-08-30 16:22:22,407 INFO L226 Difference]: Without dead ends: 106 [2021-08-30 16:22:22,408 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 627.74ms TimeCoverageRelationStatistics Valid=266, Invalid=1990, Unknown=0, NotChecked=0, Total=2256 [2021-08-30 16:22:22,408 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 157 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 236.64ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:22,408 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 73 Invalid, 849 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [15 Valid, 592 Invalid, 0 Unknown, 242 Unchecked, 236.64ms Time] [2021-08-30 16:22:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-30 16:22:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2021-08-30 16:22:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 96 states have internal predecessors, (106), 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) [2021-08-30 16:22:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-08-30 16:22:22,410 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 41 [2021-08-30 16:22:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:22,410 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-08-30 16:22:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-08-30 16:22:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 16:22:22,410 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:22,411 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:22,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:22,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-30 16:22:22,621 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:22,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2043759601, now seen corresponding path program 3 times [2021-08-30 16:22:22,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:22,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664570016] [2021-08-30 16:22:22,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:22,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:22,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:22,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:22,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664570016] [2021-08-30 16:22:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664570016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:22,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534019232] [2021-08-30 16:22:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:22:22,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:22,739 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:22,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:22:22,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-30 16:22:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:22,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 16:22:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:23,191 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 7 treesize of output 5 [2021-08-30 16:22:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534019232] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:23,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:23,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-08-30 16:22:23,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778985812] [2021-08-30 16:22:23,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-30 16:22:23,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-30 16:22:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-30 16:22:23,243 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 30 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:23,775 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2021-08-30 16:22:23,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:22:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-30 16:22:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:23,778 INFO L225 Difference]: With dead ends: 155 [2021-08-30 16:22:23,778 INFO L226 Difference]: Without dead ends: 155 [2021-08-30 16:22:23,778 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 361.25ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:22:23,778 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 305 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 339.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 402.73ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:23,779 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 52 Invalid, 1158 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [36 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 402.73ms Time] [2021-08-30 16:22:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-30 16:22:23,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2021-08-30 16:22:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 107 states have (on average 1.1214953271028036) internal successors, (120), 108 states have internal predecessors, (120), 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) [2021-08-30 16:22:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2021-08-30 16:22:23,781 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 45 [2021-08-30 16:22:23,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:23,781 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2021-08-30 16:22:23,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.730769230769231) internal successors, (97), 26 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2021-08-30 16:22:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:22:23,782 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:23,782 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:23,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:23,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:23,993 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:23,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1906876194, now seen corresponding path program 2 times [2021-08-30 16:22:23,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:23,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532750618] [2021-08-30 16:22:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:23,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:24,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:24,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:24,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532750618] [2021-08-30 16:22:24,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532750618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:24,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949315470] [2021-08-30 16:22:24,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:22:24,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:24,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:24,183 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:24,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 16:22:24,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:22:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-30 16:22:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:24,274 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 [2021-08-30 16:22:24,390 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 [2021-08-30 16:22:24,436 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:22:24,437 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 [2021-08-30 16:22:24,818 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:22:24,818 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 [2021-08-30 16:22:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:24,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:25,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= 0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 1)))) is different from false [2021-08-30 16:22:25,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-08-30 16:22:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:25,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949315470] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:25,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:25,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2021-08-30 16:22:25,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748369156] [2021-08-30 16:22:25,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-30 16:22:25,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-30 16:22:25,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=778, Unknown=1, NotChecked=56, Total=930 [2021-08-30 16:22:25,729 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 31 states, 29 states have (on average 3.689655172413793) internal successors, (107), 27 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:27,972 INFO L93 Difference]: Finished difference Result 170 states and 183 transitions. [2021-08-30 16:22:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:22:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.689655172413793) internal successors, (107), 27 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:22:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:27,973 INFO L225 Difference]: With dead ends: 170 [2021-08-30 16:22:27,973 INFO L226 Difference]: Without dead ends: 146 [2021-08-30 16:22:27,973 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 3052.34ms TimeCoverageRelationStatistics Valid=167, Invalid=1316, Unknown=3, NotChecked=74, Total=1560 [2021-08-30 16:22:27,974 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.23ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 172.59ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:27,974 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 72 Invalid, 652 Unknown, 0 Unchecked, 2.23ms Time], IncrementalHoareTripleChecker [10 Valid, 411 Invalid, 0 Unknown, 231 Unchecked, 172.59ms Time] [2021-08-30 16:22:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-30 16:22:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2021-08-30 16:22:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 135 states have internal predecessors, (149), 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) [2021-08-30 16:22:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2021-08-30 16:22:27,977 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 51 [2021-08-30 16:22:27,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:27,977 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2021-08-30 16:22:27,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.689655172413793) internal successors, (107), 27 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2021-08-30 16:22:27,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:22:27,983 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:27,983 INFO L513 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] [2021-08-30 16:22:27,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:28,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:28,185 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1943965187, now seen corresponding path program 4 times [2021-08-30 16:22:28,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:28,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22913822] [2021-08-30 16:22:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:28,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:28,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:28,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22913822] [2021-08-30 16:22:28,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22913822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:28,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43928719] [2021-08-30 16:22:28,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:22:28,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:28,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:28,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:28,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 16:22:28,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:22:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-30 16:22:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:28,516 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:22:28,516 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 [2021-08-30 16:22:28,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 16:22:28,952 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-08-30 16:22:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2021-08-30 16:22:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:28,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:29,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-08-30 16:22:29,295 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 30 treesize of output 28 [2021-08-30 16:22:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43928719] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:29,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:29,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 44 [2021-08-30 16:22:29,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830857068] [2021-08-30 16:22:29,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-30 16:22:29,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-30 16:22:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:22:29,644 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand has 44 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:31,306 INFO L93 Difference]: Finished difference Result 260 states and 277 transitions. [2021-08-30 16:22:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-30 16:22:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:22:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:31,310 INFO L225 Difference]: With dead ends: 260 [2021-08-30 16:22:31,310 INFO L226 Difference]: Without dead ends: 251 [2021-08-30 16:22:31,311 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 1607.09ms TimeCoverageRelationStatistics Valid=708, Invalid=6098, Unknown=0, NotChecked=0, Total=6806 [2021-08-30 16:22:31,311 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 492 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 542.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.17ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 654.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:31,311 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 106 Invalid, 2145 Unknown, 0 Unchecked, 7.17ms Time], IncrementalHoareTripleChecker [72 Valid, 1623 Invalid, 0 Unknown, 450 Unchecked, 654.48ms Time] [2021-08-30 16:22:31,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-30 16:22:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 207. [2021-08-30 16:22:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 197 states have (on average 1.101522842639594) internal successors, (217), 198 states have internal predecessors, (217), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2021-08-30 16:22:31,315 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 51 [2021-08-30 16:22:31,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:31,315 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2021-08-30 16:22:31,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:31,315 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2021-08-30 16:22:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 16:22:31,315 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:31,316 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:31,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:31,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-30 16:22:31,516 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:31,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2001819386, now seen corresponding path program 5 times [2021-08-30 16:22:31,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:31,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99026113] [2021-08-30 16:22:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:31,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:31,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:31,650 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:31,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:31,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99026113] [2021-08-30 16:22:31,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99026113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:31,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185133387] [2021-08-30 16:22:31,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:22:31,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:31,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:31,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:31,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:22:31,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-30 16:22:31,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-30 16:22:31,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:31,752 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:22:31,752 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 [2021-08-30 16:22:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:32,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185133387] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:32,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:32,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2021-08-30 16:22:32,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023897510] [2021-08-30 16:22:32,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-30 16:22:32,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:32,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-30 16:22:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-08-30 16:22:32,419 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 30 states, 29 states have (on average 4.275862068965517) internal successors, (124), 27 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) [2021-08-30 16:22:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:33,071 INFO L93 Difference]: Finished difference Result 270 states and 291 transitions. [2021-08-30 16:22:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:22:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.275862068965517) internal successors, (124), 27 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 55 [2021-08-30 16:22:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:33,072 INFO L225 Difference]: With dead ends: 270 [2021-08-30 16:22:33,072 INFO L226 Difference]: Without dead ends: 270 [2021-08-30 16:22:33,072 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 440.69ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-08-30 16:22:33,073 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 319 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.48ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.65ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:33,073 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 51 Invalid, 1509 Unknown, 0 Unchecked, 3.48ms Time], IncrementalHoareTripleChecker [37 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 468.65ms Time] [2021-08-30 16:22:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-08-30 16:22:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 219. [2021-08-30 16:22:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 209 states have (on average 1.105263157894737) internal successors, (231), 210 states have internal predecessors, (231), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 239 transitions. [2021-08-30 16:22:33,079 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 239 transitions. Word has length 55 [2021-08-30 16:22:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:33,079 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 239 transitions. [2021-08-30 16:22:33,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.275862068965517) internal successors, (124), 27 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) [2021-08-30 16:22:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 239 transitions. [2021-08-30 16:22:33,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 16:22:33,080 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:33,080 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:33,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:33,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-30 16:22:33,297 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1800116063, now seen corresponding path program 3 times [2021-08-30 16:22:33,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:33,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883966679] [2021-08-30 16:22:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:33,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:33,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:22:33,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:33,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883966679] [2021-08-30 16:22:33,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883966679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:33,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062563330] [2021-08-30 16:22:33,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:22:33,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:33,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:33,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:33,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 16:22:33,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-30 16:22:33,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:22:33,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-30 16:22:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:33,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:33,997 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 11 [2021-08-30 16:22:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:22:34,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062563330] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:22:34,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:22:34,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 30 [2021-08-30 16:22:34,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584867578] [2021-08-30 16:22:34,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-30 16:22:34,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:22:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-30 16:22:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-08-30 16:22:34,137 INFO L87 Difference]: Start difference. First operand 219 states and 239 transitions. Second operand has 31 states, 30 states have (on average 4.566666666666666) internal successors, (137), 27 states have internal predecessors, (137), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:22:34,790 INFO L93 Difference]: Finished difference Result 433 states and 472 transitions. [2021-08-30 16:22:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 16:22:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.566666666666666) internal successors, (137), 27 states have internal predecessors, (137), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-08-30 16:22:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:22:34,791 INFO L225 Difference]: With dead ends: 433 [2021-08-30 16:22:34,791 INFO L226 Difference]: Without dead ends: 433 [2021-08-30 16:22:34,792 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 499.52ms TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:22:34,792 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 284 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 433.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:22:34,793 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 72 Invalid, 1342 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [29 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 433.72ms Time] [2021-08-30 16:22:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-30 16:22:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 283. [2021-08-30 16:22:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 273 states have (on average 1.1025641025641026) internal successors, (301), 274 states have internal predecessors, (301), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 309 transitions. [2021-08-30 16:22:34,797 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 309 transitions. Word has length 55 [2021-08-30 16:22:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:22:34,798 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 309 transitions. [2021-08-30 16:22:34,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.566666666666666) internal successors, (137), 27 states have internal predecessors, (137), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:22:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 309 transitions. [2021-08-30 16:22:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-30 16:22:34,799 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:22:34,799 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:22:34,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 16:22:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-30 16:22:35,015 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:22:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:22:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1201042645, now seen corresponding path program 1 times [2021-08-30 16:22:35,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:22:35,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534543795] [2021-08-30 16:22:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:35,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:22:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:22:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:22:35,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:22:35,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534543795] [2021-08-30 16:22:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534543795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:22:35,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359598884] [2021-08-30 16:22:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:22:35,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:22:35,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:22:35,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:22:35,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 16:22:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:22:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-30 16:22:35,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:22:35,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:22:35,594 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:22:35,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-08-30 16:22:37,066 INFO L354 Elim1Store]: treesize reduction 106, result has 34.2 percent of original size [2021-08-30 16:22:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 124 [2021-08-30 16:22:37,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:22:37,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:22:38,817 INFO L354 Elim1Store]: treesize reduction 87, result has 43.9 percent of original size [2021-08-30 16:22:38,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 998 treesize of output 899 [2021-08-30 16:22:38,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:22:38,853 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 800 treesize of output 800 [2021-08-30 16:22:39,123 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 6 treesize of output 4 [2021-08-30 16:22:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,230 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:22:39,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 16 [2021-08-30 16:22:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,259 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:22:39,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2021-08-30 16:22:39,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,386 INFO L354 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2021-08-30 16:22:39,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 46 [2021-08-30 16:22:39,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,470 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-08-30 16:22:39,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-08-30 16:22:39,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,534 INFO L354 Elim1Store]: treesize reduction 7, result has 36.4 percent of original size [2021-08-30 16:22:39,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2021-08-30 16:22:39,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:39,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:22:39,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-08-30 16:22:40,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:40,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:40,033 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:22:40,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 12 [2021-08-30 16:22:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:22:40,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:40,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 12 [2021-08-30 16:22:40,279 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-08-30 16:22:40,309 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-08-30 16:22:40,346 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-08-30 16:22:40,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:40,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:22:40,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:22:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 803 treesize of output 807 [2021-08-30 16:23:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:23:00,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359598884] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:00,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:00,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 59 [2021-08-30 16:23:00,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392058865] [2021-08-30 16:23:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:23:00,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:23:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3061, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:23:00,732 INFO L87 Difference]: Start difference. First operand 283 states and 309 transitions. Second operand has 59 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 55 states have internal predecessors, (131), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:01,409 INFO L93 Difference]: Finished difference Result 327 states and 353 transitions. [2021-08-30 16:23:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-30 16:23:01,409 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 55 states have internal predecessors, (131), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-08-30 16:23:01,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:01,410 INFO L225 Difference]: With dead ends: 327 [2021-08-30 16:23:01,410 INFO L226 Difference]: Without dead ends: 292 [2021-08-30 16:23:01,411 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2330.96ms TimeCoverageRelationStatistics Valid=523, Invalid=4879, Unknown=0, NotChecked=0, Total=5402 [2021-08-30 16:23:01,412 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 167.35ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:01,412 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 109 Invalid, 971 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [8 Valid, 517 Invalid, 0 Unknown, 446 Unchecked, 167.35ms Time] [2021-08-30 16:23:01,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-30 16:23:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2021-08-30 16:23:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 279 states have (on average 1.1003584229390682) internal successors, (307), 280 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) [2021-08-30 16:23:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 314 transitions. [2021-08-30 16:23:01,416 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 314 transitions. Word has length 61 [2021-08-30 16:23:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:01,416 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 314 transitions. [2021-08-30 16:23:01,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 55 states have internal predecessors, (131), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 314 transitions. [2021-08-30 16:23:01,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-30 16:23:01,417 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:01,417 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:01,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:01,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:01,625 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash -709186118, now seen corresponding path program 6 times [2021-08-30 16:23:01,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:01,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224484023] [2021-08-30 16:23:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:01,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:01,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:01,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224484023] [2021-08-30 16:23:01,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224484023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:01,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342131018] [2021-08-30 16:23:01,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:23:01,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:01,799 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) [2021-08-30 16:23:01,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 16:23:01,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:23:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-30 16:23:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:23:02,489 INFO L354 Elim1Store]: treesize reduction 27, result has 22.9 percent of original size [2021-08-30 16:23:02,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 24 [2021-08-30 16:23:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:02,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:02,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-08-30 16:23:02,753 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 16:23:02,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2021-08-30 16:23:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:02,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342131018] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:02,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:02,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 46 [2021-08-30 16:23:02,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333378354] [2021-08-30 16:23:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 16:23:02,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 16:23:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:23:02,911 INFO L87 Difference]: Start difference. First operand 288 states and 314 transitions. Second operand has 46 states, 43 states have (on average 3.116279069767442) internal successors, (134), 42 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:03,857 INFO L93 Difference]: Finished difference Result 375 states and 404 transitions. [2021-08-30 16:23:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 16:23:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 3.116279069767442) internal successors, (134), 42 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-08-30 16:23:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:03,861 INFO L225 Difference]: With dead ends: 375 [2021-08-30 16:23:03,861 INFO L226 Difference]: Without dead ends: 343 [2021-08-30 16:23:03,862 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1175.91ms TimeCoverageRelationStatistics Valid=417, Invalid=4139, Unknown=0, NotChecked=0, Total=4556 [2021-08-30 16:23:03,862 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 142 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 331.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.07ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 816 IncrementalHoareTripleChecker+Unchecked, 395.26ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:03,862 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 124 Invalid, 2084 Unknown, 0 Unchecked, 3.07ms Time], IncrementalHoareTripleChecker [26 Valid, 1242 Invalid, 0 Unknown, 816 Unchecked, 395.26ms Time] [2021-08-30 16:23:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-08-30 16:23:03,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 322. [2021-08-30 16:23:03,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 312 states have (on average 1.0993589743589745) internal successors, (343), 313 states have internal predecessors, (343), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 351 transitions. [2021-08-30 16:23:03,867 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 351 transitions. Word has length 61 [2021-08-30 16:23:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:03,867 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 351 transitions. [2021-08-30 16:23:03,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 3.116279069767442) internal successors, (134), 42 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 351 transitions. [2021-08-30 16:23:03,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-30 16:23:03,868 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:03,868 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:03,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:04,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:04,088 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 68362493, now seen corresponding path program 7 times [2021-08-30 16:23:04,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:04,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434391324] [2021-08-30 16:23:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:04,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:04,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:04,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:04,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434391324] [2021-08-30 16:23:04,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434391324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:04,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851834702] [2021-08-30 16:23:04,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:23:04,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:04,269 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:04,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 16:23:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-30 16:23:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:04,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:04,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:23:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:04,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851834702] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:04,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:04,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2021-08-30 16:23:04,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295043007] [2021-08-30 16:23:04,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:23:04,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:04,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:23:04,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:23:04,896 INFO L87 Difference]: Start difference. First operand 322 states and 351 transitions. Second operand has 36 states, 32 states have (on average 4.0625) internal successors, (130), 32 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:05,708 INFO L93 Difference]: Finished difference Result 511 states and 555 transitions. [2021-08-30 16:23:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 16:23:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 4.0625) internal successors, (130), 32 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-08-30 16:23:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:05,710 INFO L225 Difference]: With dead ends: 511 [2021-08-30 16:23:05,710 INFO L226 Difference]: Without dead ends: 511 [2021-08-30 16:23:05,710 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 484.01ms TimeCoverageRelationStatistics Valid=270, Invalid=1800, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:23:05,711 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 394 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 531.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 641.89ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:05,711 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 73 Invalid, 2187 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [40 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 641.89ms Time] [2021-08-30 16:23:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-08-30 16:23:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 414. [2021-08-30 16:23:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 404 states have (on average 1.1113861386138615) internal successors, (449), 405 states have internal predecessors, (449), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 457 transitions. [2021-08-30 16:23:05,716 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 457 transitions. Word has length 65 [2021-08-30 16:23:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:05,717 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 457 transitions. [2021-08-30 16:23:05,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 4.0625) internal successors, (130), 32 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 457 transitions. [2021-08-30 16:23:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-30 16:23:05,718 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:05,718 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:05,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:05,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-30 16:23:05,932 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1213534789, now seen corresponding path program 4 times [2021-08-30 16:23:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:05,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487999408] [2021-08-30 16:23:05,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:05,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:06,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:23:06,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:06,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487999408] [2021-08-30 16:23:06,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487999408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:06,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064939267] [2021-08-30 16:23:06,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:23:06,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:06,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:06,475 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) [2021-08-30 16:23:06,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 16:23:06,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:23:06,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:06,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-30 16:23:06,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:06,577 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 [2021-08-30 16:23:06,583 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 [2021-08-30 16:23:06,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 16:23:06,876 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:23:06,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-30 16:23:07,421 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:23:07,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2021-08-30 16:23:10,028 INFO L354 Elim1Store]: treesize reduction 58, result has 31.0 percent of original size [2021-08-30 16:23:10,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 57 [2021-08-30 16:23:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:10,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:12,615 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:23:12,616 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 370 treesize of output 334 [2021-08-30 16:23:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:13,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064939267] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:13,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:13,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 20] total 62 [2021-08-30 16:23:13,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091127005] [2021-08-30 16:23:13,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-30 16:23:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-30 16:23:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3585, Unknown=1, NotChecked=0, Total=3782 [2021-08-30 16:23:13,041 INFO L87 Difference]: Start difference. First operand 414 states and 457 transitions. Second operand has 62 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 58 states have internal predecessors, (174), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:19,157 INFO L93 Difference]: Finished difference Result 607 states and 660 transitions. [2021-08-30 16:23:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-30 16:23:19,158 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 58 states have internal predecessors, (174), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-08-30 16:23:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:19,159 INFO L225 Difference]: With dead ends: 607 [2021-08-30 16:23:19,159 INFO L226 Difference]: Without dead ends: 559 [2021-08-30 16:23:19,161 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 10923.07ms TimeCoverageRelationStatistics Valid=698, Invalid=9401, Unknown=1, NotChecked=0, Total=10100 [2021-08-30 16:23:19,161 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 199 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 256.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 304.93ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:19,161 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 117 Invalid, 1342 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [57 Valid, 836 Invalid, 0 Unknown, 449 Unchecked, 304.93ms Time] [2021-08-30 16:23:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-30 16:23:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 556. [2021-08-30 16:23:19,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 543 states have (on average 1.1012891344383058) internal successors, (598), 544 states have internal predecessors, (598), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 609 transitions. [2021-08-30 16:23:19,168 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 609 transitions. Word has length 68 [2021-08-30 16:23:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:19,168 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 609 transitions. [2021-08-30 16:23:19,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 2.9491525423728815) internal successors, (174), 58 states have internal predecessors, (174), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 609 transitions. [2021-08-30 16:23:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-30 16:23:19,169 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:19,169 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:19,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:19,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:19,395 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1171066993, now seen corresponding path program 8 times [2021-08-30 16:23:19,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594273053] [2021-08-30 16:23:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:19,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:19,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:19,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594273053] [2021-08-30 16:23:19,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594273053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:19,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114829315] [2021-08-30 16:23:19,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:23:19,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:19,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:19,602 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:19,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 16:23:19,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:23:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:19,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-30 16:23:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:19,713 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:23:19,713 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 [2021-08-30 16:23:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 16:23:20,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:23:20,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-08-30 16:23:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:20,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:21,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-08-30 16:23:21,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:23:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 28 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114829315] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:21,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:21,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2021-08-30 16:23:21,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605178716] [2021-08-30 16:23:21,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:23:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:23:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=3184, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:23:21,999 INFO L87 Difference]: Start difference. First operand 556 states and 609 transitions. Second operand has 59 states, 56 states have (on average 3.4285714285714284) internal successors, (192), 55 states have internal predecessors, (192), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:23,861 INFO L93 Difference]: Finished difference Result 708 states and 769 transitions. [2021-08-30 16:23:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-30 16:23:23,861 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 56 states have (on average 3.4285714285714284) internal successors, (192), 55 states have internal predecessors, (192), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-08-30 16:23:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:23,862 INFO L225 Difference]: With dead ends: 708 [2021-08-30 16:23:23,863 INFO L226 Difference]: Without dead ends: 670 [2021-08-30 16:23:23,863 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 2511.07ms TimeCoverageRelationStatistics Valid=693, Invalid=8813, Unknown=0, NotChecked=0, Total=9506 [2021-08-30 16:23:23,864 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 269 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 474.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.03ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 903 IncrementalHoareTripleChecker+Unchecked, 595.66ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:23,864 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 123 Invalid, 2640 Unknown, 0 Unchecked, 4.03ms Time], IncrementalHoareTripleChecker [28 Valid, 1709 Invalid, 0 Unknown, 903 Unchecked, 595.66ms Time] [2021-08-30 16:23:23,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-08-30 16:23:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 626. [2021-08-30 16:23:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 611 states have (on average 1.1014729950900164) internal successors, (673), 612 states have internal predecessors, (673), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 686 transitions. [2021-08-30 16:23:23,872 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 686 transitions. Word has length 71 [2021-08-30 16:23:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:23,872 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 686 transitions. [2021-08-30 16:23:23,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 56 states have (on average 3.4285714285714284) internal successors, (192), 55 states have internal predecessors, (192), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 686 transitions. [2021-08-30 16:23:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-30 16:23:23,874 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:23,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:23,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-30 16:23:24,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:24,081 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:24,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:24,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1329333336, now seen corresponding path program 5 times [2021-08-30 16:23:24,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:24,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360055651] [2021-08-30 16:23:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:24,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:24,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:24,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360055651] [2021-08-30 16:23:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360055651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254479474] [2021-08-30 16:23:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:23:24,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:24,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:24,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 16:23:24,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-30 16:23:24,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:24,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-30 16:23:24,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:24,333 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:23:24,333 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 [2021-08-30 16:23:24,334 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 [2021-08-30 16:23:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:24,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:25,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254479474] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:25,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:25,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2021-08-30 16:23:25,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983080424] [2021-08-30 16:23:25,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-30 16:23:25,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-30 16:23:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:23:25,049 INFO L87 Difference]: Start difference. First operand 626 states and 686 transitions. Second operand has 28 states, 27 states have (on average 6.703703703703703) internal successors, (181), 25 states have internal predecessors, (181), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:25,854 INFO L93 Difference]: Finished difference Result 1089 states and 1203 transitions. [2021-08-30 16:23:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:23:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.703703703703703) internal successors, (181), 25 states have internal predecessors, (181), 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 72 [2021-08-30 16:23:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:25,857 INFO L225 Difference]: With dead ends: 1089 [2021-08-30 16:23:25,857 INFO L226 Difference]: Without dead ends: 1089 [2021-08-30 16:23:25,857 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 449.19ms TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:23:25,858 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 192 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 519.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.73ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 631.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:25,858 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 71 Invalid, 1970 Unknown, 0 Unchecked, 3.73ms Time], IncrementalHoareTripleChecker [17 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 631.55ms Time] [2021-08-30 16:23:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-08-30 16:23:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 758. [2021-08-30 16:23:25,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 743 states have (on average 1.1036339165545088) internal successors, (820), 744 states have internal predecessors, (820), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 833 transitions. [2021-08-30 16:23:25,871 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 833 transitions. Word has length 72 [2021-08-30 16:23:25,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:25,872 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 833 transitions. [2021-08-30 16:23:25,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.703703703703703) internal successors, (181), 25 states have internal predecessors, (181), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:25,873 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 833 transitions. [2021-08-30 16:23:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:23:25,874 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:25,874 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:25,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:26,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-30 16:23:26,081 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1304016412, now seen corresponding path program 2 times [2021-08-30 16:23:26,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:26,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777050206] [2021-08-30 16:23:26,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:26,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:26,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:26,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:26,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777050206] [2021-08-30 16:23:26,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777050206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:26,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302081141] [2021-08-30 16:23:26,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:23:26,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:26,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:26,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:26,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 16:23:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:23:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-30 16:23:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:26,359 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 [2021-08-30 16:23:26,507 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 [2021-08-30 16:23:26,545 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:23:26,546 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 [2021-08-30 16:23:27,033 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:23:27,033 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 [2021-08-30 16:23:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:27,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:27,626 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 2 c_main_~nondetString1~0.offset)) 0)) is different from false [2021-08-30 16:23:27,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-08-30 16:23:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302081141] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:27,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:27,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-08-30 16:23:27,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942960155] [2021-08-30 16:23:27,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-30 16:23:27,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-30 16:23:27,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=956, Unknown=1, NotChecked=62, Total=1122 [2021-08-30 16:23:27,786 INFO L87 Difference]: Start difference. First operand 758 states and 833 transitions. Second operand has 34 states, 32 states have (on average 4.5) internal successors, (144), 30 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:30,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:30,137 INFO L93 Difference]: Finished difference Result 737 states and 809 transitions. [2021-08-30 16:23:30,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:23:30,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.5) internal successors, (144), 30 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:23:30,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:30,139 INFO L225 Difference]: With dead ends: 737 [2021-08-30 16:23:30,139 INFO L226 Difference]: Without dead ends: 722 [2021-08-30 16:23:30,139 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3072.53ms TimeCoverageRelationStatistics Valid=158, Invalid=1403, Unknown=3, NotChecked=76, Total=1640 [2021-08-30 16:23:30,139 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.10ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 144.87ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:30,139 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 73 Invalid, 671 Unknown, 0 Unchecked, 1.10ms Time], IncrementalHoareTripleChecker [10 Valid, 473 Invalid, 0 Unknown, 188 Unchecked, 144.87ms Time] [2021-08-30 16:23:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-08-30 16:23:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 719. [2021-08-30 16:23:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 704 states have (on average 1.1051136363636365) internal successors, (778), 705 states have internal predecessors, (778), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 791 transitions. [2021-08-30 16:23:30,148 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 791 transitions. Word has length 78 [2021-08-30 16:23:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:30,148 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 791 transitions. [2021-08-30 16:23:30,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.5) internal successors, (144), 30 states have internal predecessors, (144), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 791 transitions. [2021-08-30 16:23:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:23:30,149 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:30,150 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:30,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:30,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:30,369 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:30,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:30,369 INFO L82 PathProgramCache]: Analyzing trace with hash -449434420, now seen corresponding path program 3 times [2021-08-30 16:23:30,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:30,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380976018] [2021-08-30 16:23:30,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:30,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:30,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:30,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:30,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380976018] [2021-08-30 16:23:30,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380976018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:30,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485553312] [2021-08-30 16:23:30,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:23:30,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:30,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:30,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:30,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 16:23:30,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:23:30,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-30 16:23:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:30,804 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 [2021-08-30 16:23:30,981 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 [2021-08-30 16:23:31,020 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:23:31,020 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 [2021-08-30 16:23:32,171 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-08-30 16:23:32,172 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 53 treesize of output 52 [2021-08-30 16:23:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:32,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:35,841 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (cstrpbrk_~s~0.offset Int) (cstrpbrk_~s~0.base Int) (main_~length2~0 Int)) (let ((.cse1 (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)))) (let ((.cse0 (select (select .cse1 cstrpbrk_~s~0.base) cstrpbrk_~s~0.offset))) (or (= .cse0 0) (not (= .cse0 (select (select .cse1 c_main_~nondetString1~0.base) (+ 2 c_main_~nondetString1~0.offset)))))))) is different from false [2021-08-30 16:23:35,849 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:23:35,849 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 404 treesize of output 360 [2021-08-30 16:23:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:36,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485553312] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:36,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:36,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 55 [2021-08-30 16:23:36,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099480060] [2021-08-30 16:23:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 16:23:36,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 16:23:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2696, Unknown=6, NotChecked=104, Total=2970 [2021-08-30 16:23:36,116 INFO L87 Difference]: Start difference. First operand 719 states and 791 transitions. Second operand has 55 states, 53 states have (on average 3.339622641509434) internal successors, (177), 51 states have internal predecessors, (177), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:37,809 INFO L93 Difference]: Finished difference Result 819 states and 900 transitions. [2021-08-30 16:23:37,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 16:23:37,809 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.339622641509434) internal successors, (177), 51 states have internal predecessors, (177), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:23:37,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:37,811 INFO L225 Difference]: With dead ends: 819 [2021-08-30 16:23:37,811 INFO L226 Difference]: Without dead ends: 813 [2021-08-30 16:23:37,812 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 5696.27ms TimeCoverageRelationStatistics Valid=338, Invalid=5359, Unknown=7, NotChecked=148, Total=5852 [2021-08-30 16:23:37,812 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.56ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 621 IncrementalHoareTripleChecker+Unchecked, 297.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:37,812 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 144 Invalid, 1649 Unknown, 0 Unchecked, 2.56ms Time], IncrementalHoareTripleChecker [13 Valid, 1015 Invalid, 0 Unknown, 621 Unchecked, 297.76ms Time] [2021-08-30 16:23:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-08-30 16:23:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 808. [2021-08-30 16:23:37,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 793 states have (on average 1.1046658259773015) internal successors, (876), 794 states have internal predecessors, (876), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 889 transitions. [2021-08-30 16:23:37,821 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 889 transitions. Word has length 78 [2021-08-30 16:23:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:37,821 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 889 transitions. [2021-08-30 16:23:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.339622641509434) internal successors, (177), 51 states have internal predecessors, (177), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 889 transitions. [2021-08-30 16:23:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:23:37,823 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:37,823 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:37,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:38,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:38,037 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:38,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:38,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1415298332, now seen corresponding path program 4 times [2021-08-30 16:23:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:38,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333307703] [2021-08-30 16:23:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:38,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:38,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:23:38,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:38,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333307703] [2021-08-30 16:23:38,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333307703] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:38,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221848055] [2021-08-30 16:23:38,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:23:38,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:38,344 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:38,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-30 16:23:38,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:23:38,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-30 16:23:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:38,445 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:23:38,445 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 [2021-08-30 16:23:38,452 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 [2021-08-30 16:23:38,713 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 [2021-08-30 16:23:38,752 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:23:38,753 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 [2021-08-30 16:23:39,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:23:39,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-08-30 16:23:42,024 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-08-30 16:23:42,024 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 63 treesize of output 66 [2021-08-30 16:23:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:44,369 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:23:44,370 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 380 treesize of output 344 [2021-08-30 16:23:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:23:44,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221848055] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:44,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:44,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 54 [2021-08-30 16:23:44,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939633352] [2021-08-30 16:23:44,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-30 16:23:44,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-30 16:23:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2694, Unknown=1, NotChecked=0, Total=2862 [2021-08-30 16:23:44,787 INFO L87 Difference]: Start difference. First operand 808 states and 889 transitions. Second operand has 54 states, 52 states have (on average 3.5) internal successors, (182), 50 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:46,503 INFO L93 Difference]: Finished difference Result 1148 states and 1266 transitions. [2021-08-30 16:23:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-30 16:23:46,504 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 3.5) internal successors, (182), 50 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:23:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:46,506 INFO L225 Difference]: With dead ends: 1148 [2021-08-30 16:23:46,506 INFO L226 Difference]: Without dead ends: 1142 [2021-08-30 16:23:46,507 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 5944.04ms TimeCoverageRelationStatistics Valid=491, Invalid=6990, Unknown=1, NotChecked=0, Total=7482 [2021-08-30 16:23:46,507 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 283.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.63ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 753 IncrementalHoareTripleChecker+Unchecked, 340.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:46,507 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 148 Invalid, 1831 Unknown, 0 Unchecked, 2.63ms Time], IncrementalHoareTripleChecker [20 Valid, 1058 Invalid, 0 Unknown, 753 Unchecked, 340.96ms Time] [2021-08-30 16:23:46,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-08-30 16:23:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1047. [2021-08-30 16:23:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1032 states have (on average 1.1153100775193798) internal successors, (1151), 1033 states have internal predecessors, (1151), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1164 transitions. [2021-08-30 16:23:46,519 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1164 transitions. Word has length 78 [2021-08-30 16:23:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:46,519 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1164 transitions. [2021-08-30 16:23:46,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 3.5) internal successors, (182), 50 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1164 transitions. [2021-08-30 16:23:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-30 16:23:46,520 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:46,520 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:46,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-30 16:23:46,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:46,737 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:46,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1330576907, now seen corresponding path program 1 times [2021-08-30 16:23:46,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:46,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841028687] [2021-08-30 16:23:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:46,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:47,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 16:23:47,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:47,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841028687] [2021-08-30 16:23:47,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841028687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:47,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997122239] [2021-08-30 16:23:47,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:47,021 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:47,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:47,025 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:47,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-30 16:23:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:23:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:23:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:23:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:23:47,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:23:47,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:23:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:23:47,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997122239] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:47,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:47,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 38 [2021-08-30 16:23:47,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132130537] [2021-08-30 16:23:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 16:23:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 16:23:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:23:47,774 INFO L87 Difference]: Start difference. First operand 1047 states and 1164 transitions. Second operand has 38 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:48,826 INFO L93 Difference]: Finished difference Result 1088 states and 1187 transitions. [2021-08-30 16:23:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 16:23:48,827 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-08-30 16:23:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:48,829 INFO L225 Difference]: With dead ends: 1088 [2021-08-30 16:23:48,829 INFO L226 Difference]: Without dead ends: 1070 [2021-08-30 16:23:48,830 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 913.40ms TimeCoverageRelationStatistics Valid=324, Invalid=3216, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 16:23:48,830 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 148 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 557.50ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:48,830 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 122 Invalid, 1992 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [33 Valid, 1797 Invalid, 0 Unknown, 162 Unchecked, 557.50ms Time] [2021-08-30 16:23:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-08-30 16:23:48,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1005. [2021-08-30 16:23:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 990 states have (on average 1.1020202020202021) internal successors, (1091), 991 states have internal predecessors, (1091), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1104 transitions. [2021-08-30 16:23:48,845 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1104 transitions. Word has length 78 [2021-08-30 16:23:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:48,845 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 1104 transitions. [2021-08-30 16:23:48,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 4.228571428571429) internal successors, (148), 34 states have internal predecessors, (148), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1104 transitions. [2021-08-30 16:23:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-30 16:23:48,846 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:48,847 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:23:48,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:49,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-30 16:23:49,064 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1811031592, now seen corresponding path program 9 times [2021-08-30 16:23:49,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:49,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273363423] [2021-08-30 16:23:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:49,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:49,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:49,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:49,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273363423] [2021-08-30 16:23:49,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273363423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:49,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499273877] [2021-08-30 16:23:49,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:23:49,299 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:49,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:49,300 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:49,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-30 16:23:49,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-30 16:23:49,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:49,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-30 16:23:49,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:49,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:23:49,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:23:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:49,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:49,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:23:49,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:23:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:23:50,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499273877] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:50,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:50,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 41 [2021-08-30 16:23:50,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785729924] [2021-08-30 16:23:50,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-30 16:23:50,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-30 16:23:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1514, Unknown=0, NotChecked=0, Total=1640 [2021-08-30 16:23:50,130 INFO L87 Difference]: Start difference. First operand 1005 states and 1104 transitions. Second operand has 41 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:51,388 INFO L93 Difference]: Finished difference Result 1642 states and 1800 transitions. [2021-08-30 16:23:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-30 16:23:51,388 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-08-30 16:23:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:51,391 INFO L225 Difference]: With dead ends: 1642 [2021-08-30 16:23:51,391 INFO L226 Difference]: Without dead ends: 1587 [2021-08-30 16:23:51,392 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 816.88ms TimeCoverageRelationStatistics Valid=300, Invalid=3240, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 16:23:51,392 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 736.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.89ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 901.41ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:51,392 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 187 Invalid, 3324 Unknown, 0 Unchecked, 5.89ms Time], IncrementalHoareTripleChecker [29 Valid, 3173 Invalid, 0 Unknown, 122 Unchecked, 901.41ms Time] [2021-08-30 16:23:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-08-30 16:23:51,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1204. [2021-08-30 16:23:51,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1187 states have (on average 1.1061499578770009) internal successors, (1313), 1188 states have internal predecessors, (1313), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1328 transitions. [2021-08-30 16:23:51,413 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1328 transitions. Word has length 81 [2021-08-30 16:23:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:51,413 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 1328 transitions. [2021-08-30 16:23:51,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 37 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1328 transitions. [2021-08-30 16:23:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-30 16:23:51,415 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:51,415 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-08-30 16:23:51,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:51,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-30 16:23:51,629 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:51,629 INFO L82 PathProgramCache]: Analyzing trace with hash -330717544, now seen corresponding path program 5 times [2021-08-30 16:23:51,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:51,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717535525] [2021-08-30 16:23:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:51,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:51,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:23:51,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:51,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717535525] [2021-08-30 16:23:51,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717535525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:51,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545414669] [2021-08-30 16:23:51,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:23:51,774 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:51,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:51,775 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:51,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-30 16:23:51,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-30 16:23:51,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-30 16:23:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:23:52,110 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:23:52,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-08-30 16:23:53,612 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-08-30 16:23:53,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 33 [2021-08-30 16:23:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 85 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:23:53,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:23:57,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:23:57,035 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 148 treesize of output 142 [2021-08-30 16:23:57,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-30 16:23:57,067 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 16:23:57,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 93 [2021-08-30 16:23:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:23:57,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545414669] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:23:57,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:23:57,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 24] total 59 [2021-08-30 16:23:57,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508515364] [2021-08-30 16:23:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:23:57,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:23:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:23:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=3185, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:23:57,377 INFO L87 Difference]: Start difference. First operand 1204 states and 1328 transitions. Second operand has 59 states, 58 states have (on average 3.5344827586206895) internal successors, (205), 55 states have internal predecessors, (205), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:23:58,367 INFO L93 Difference]: Finished difference Result 1235 states and 1352 transitions. [2021-08-30 16:23:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-30 16:23:58,368 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.5344827586206895) internal successors, (205), 55 states have internal predecessors, (205), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-30 16:23:58,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:23:58,370 INFO L225 Difference]: With dead ends: 1235 [2021-08-30 16:23:58,370 INFO L226 Difference]: Without dead ends: 1166 [2021-08-30 16:23:58,370 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 4477.48ms TimeCoverageRelationStatistics Valid=359, Invalid=4897, Unknown=0, NotChecked=0, Total=5256 [2021-08-30 16:23:58,371 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 106 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 443.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 531.64ms IncrementalHoareTripleChecker+Time [2021-08-30 16:23:58,372 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 118 Invalid, 1942 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [20 Valid, 1560 Invalid, 0 Unknown, 362 Unchecked, 531.64ms Time] [2021-08-30 16:23:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-08-30 16:23:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1129. [2021-08-30 16:23:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1129 states, 1112 states have (on average 1.1025179856115108) internal successors, (1226), 1113 states have internal predecessors, (1226), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1129 states to 1129 states and 1241 transitions. [2021-08-30 16:23:58,385 INFO L78 Accepts]: Start accepts. Automaton has 1129 states and 1241 transitions. Word has length 84 [2021-08-30 16:23:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:23:58,386 INFO L470 AbstractCegarLoop]: Abstraction has 1129 states and 1241 transitions. [2021-08-30 16:23:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.5344827586206895) internal successors, (205), 55 states have internal predecessors, (205), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:23:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1129 states and 1241 transitions. [2021-08-30 16:23:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-30 16:23:58,388 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:23:58,388 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-08-30 16:23:58,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-30 16:23:58,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:58,593 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:23:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:23:58,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1726270128, now seen corresponding path program 6 times [2021-08-30 16:23:58,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:23:58,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143685294] [2021-08-30 16:23:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:23:58,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:23:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:58,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:23:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:23:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:23:58,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:23:58,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143685294] [2021-08-30 16:23:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143685294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:23:58,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833458717] [2021-08-30 16:23:58,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:23:58,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:23:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:23:58,741 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:23:58,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-30 16:23:58,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:23:58,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:23:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-30 16:23:58,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:23:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:23:59,210 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:23:59,211 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 37 treesize of output 36 [2021-08-30 16:24:00,894 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-30 16:24:00,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 32 [2021-08-30 16:24:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:24:00,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:01,733 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:24:01,733 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 169 [2021-08-30 16:24:01,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:24:01,738 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 165 treesize of output 159 [2021-08-30 16:24:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:24:01,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2021-08-30 16:24:01,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:24:01,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:24:01,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 84 [2021-08-30 16:24:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:24:02,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833458717] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:02,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:02,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 30, 30] total 70 [2021-08-30 16:24:02,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936886124] [2021-08-30 16:24:02,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-30 16:24:02,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:02,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-30 16:24:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=4501, Unknown=0, NotChecked=0, Total=4830 [2021-08-30 16:24:02,896 INFO L87 Difference]: Start difference. First operand 1129 states and 1241 transitions. Second operand has 70 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 66 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:04,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:04,670 INFO L93 Difference]: Finished difference Result 1142 states and 1250 transitions. [2021-08-30 16:24:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-30 16:24:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 66 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-30 16:24:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:04,675 INFO L225 Difference]: With dead ends: 1142 [2021-08-30 16:24:04,675 INFO L226 Difference]: Without dead ends: 1127 [2021-08-30 16:24:04,676 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 3209.70ms TimeCoverageRelationStatistics Valid=706, Invalid=9596, Unknown=0, NotChecked=0, Total=10302 [2021-08-30 16:24:04,676 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 520.67ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:04,676 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 162 Invalid, 1841 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [49 Valid, 1522 Invalid, 0 Unknown, 270 Unchecked, 520.67ms Time] [2021-08-30 16:24:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-08-30 16:24:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1117. [2021-08-30 16:24:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1100 states have (on average 1.1009090909090908) internal successors, (1211), 1101 states have internal predecessors, (1211), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1226 transitions. [2021-08-30 16:24:04,687 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1226 transitions. Word has length 84 [2021-08-30 16:24:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1226 transitions. [2021-08-30 16:24:04,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 3.1323529411764706) internal successors, (213), 66 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1226 transitions. [2021-08-30 16:24:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-30 16:24:04,689 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:04,689 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-08-30 16:24:04,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:04,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:04,897 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1714115176, now seen corresponding path program 7 times [2021-08-30 16:24:04,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:04,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23398375] [2021-08-30 16:24:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:04,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:04,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:05,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:24:05,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23398375] [2021-08-30 16:24:05,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23398375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:05,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996387131] [2021-08-30 16:24:05,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:24:05,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:05,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:05,068 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:05,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-30 16:24:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:05,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:24:05,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:05,186 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 [2021-08-30 16:24:05,357 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 [2021-08-30 16:24:05,379 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-08-30 16:24:05,379 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 56 treesize of output 55 [2021-08-30 16:24:05,896 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-08-30 16:24:05,896 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 29 treesize of output 14 [2021-08-30 16:24:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:24:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:06,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:24:06,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:24:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:24:06,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996387131] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:06,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:06,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-08-30 16:24:06,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709900013] [2021-08-30 16:24:06,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-30 16:24:06,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:06,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-30 16:24:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-08-30 16:24:06,285 INFO L87 Difference]: Start difference. First operand 1117 states and 1226 transitions. Second operand has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 26 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:06,547 INFO L93 Difference]: Finished difference Result 1035 states and 1126 transitions. [2021-08-30 16:24:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:24:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 26 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-08-30 16:24:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:06,549 INFO L225 Difference]: With dead ends: 1035 [2021-08-30 16:24:06,549 INFO L226 Difference]: Without dead ends: 930 [2021-08-30 16:24:06,550 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 462.30ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 16:24:06,550 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 137.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.23ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 167.16ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:06,550 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 72 Invalid, 730 Unknown, 0 Unchecked, 1.23ms Time], IncrementalHoareTripleChecker [11 Valid, 500 Invalid, 0 Unknown, 219 Unchecked, 167.16ms Time] [2021-08-30 16:24:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-08-30 16:24:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 850. [2021-08-30 16:24:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 835 states have (on average 1.102994011976048) internal successors, (921), 836 states have internal predecessors, (921), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 934 transitions. [2021-08-30 16:24:06,559 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 934 transitions. Word has length 84 [2021-08-30 16:24:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:06,559 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 934 transitions. [2021-08-30 16:24:06,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.689655172413793) internal successors, (136), 26 states have internal predecessors, (136), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 934 transitions. [2021-08-30 16:24:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-30 16:24:06,560 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:06,560 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:24:06,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:06,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:06,777 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash 10181099, now seen corresponding path program 10 times [2021-08-30 16:24:06,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:06,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168579386] [2021-08-30 16:24:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:06,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:06,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:06,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:07,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168579386] [2021-08-30 16:24:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168579386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:07,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080243995] [2021-08-30 16:24:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:24:07,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:07,001 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:07,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-30 16:24:07,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:24:07,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:24:07,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-30 16:24:07,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:07,104 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:24:07,104 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 [2021-08-30 16:24:07,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 16:24:07,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:24:07,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-08-30 16:24:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 50 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:07,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:08,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-08-30 16:24:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-08-30 16:24:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:09,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080243995] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:09,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:09,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2021-08-30 16:24:09,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235525857] [2021-08-30 16:24:09,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-30 16:24:09,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:09,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-30 16:24:09,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3087, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:24:09,561 INFO L87 Difference]: Start difference. First operand 850 states and 934 transitions. Second operand has 59 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:12,863 INFO L93 Difference]: Finished difference Result 1807 states and 1962 transitions. [2021-08-30 16:24:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-30 16:24:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-30 16:24:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:12,866 INFO L225 Difference]: With dead ends: 1807 [2021-08-30 16:24:12,866 INFO L226 Difference]: Without dead ends: 1769 [2021-08-30 16:24:12,867 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2900.22ms TimeCoverageRelationStatistics Valid=1033, Invalid=8867, Unknown=0, NotChecked=0, Total=9900 [2021-08-30 16:24:12,867 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 964 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1338.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.30ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 1611.74ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:12,867 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 71 Invalid, 4868 Unknown, 0 Unchecked, 9.30ms Time], IncrementalHoareTripleChecker [88 Valid, 4392 Invalid, 0 Unknown, 388 Unchecked, 1611.74ms Time] [2021-08-30 16:24:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-08-30 16:24:12,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1071. [2021-08-30 16:24:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 1056 states have (on average 1.1136363636363635) internal successors, (1176), 1057 states have internal predecessors, (1176), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1189 transitions. [2021-08-30 16:24:12,880 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1189 transitions. Word has length 85 [2021-08-30 16:24:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 1071 states and 1189 transitions. [2021-08-30 16:24:12,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1189 transitions. [2021-08-30 16:24:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-30 16:24:12,882 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:12,882 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:24:12,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:13,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-30 16:24:13,099 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1327649636, now seen corresponding path program 6 times [2021-08-30 16:24:13,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:13,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083148426] [2021-08-30 16:24:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:13,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:13,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:13,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083148426] [2021-08-30 16:24:13,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083148426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:13,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175368796] [2021-08-30 16:24:13,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:24:13,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:13,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:13,455 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:13,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-30 16:24:13,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:24:13,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:24:13,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-30 16:24:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:13,568 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 [2021-08-30 16:24:13,803 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 [2021-08-30 16:24:13,846 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:24:13,846 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 [2021-08-30 16:24:15,390 INFO L354 Elim1Store]: treesize reduction 77, result has 36.4 percent of original size [2021-08-30 16:24:15,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 74 [2021-08-30 16:24:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:15,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:29,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:24:29,490 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 106 treesize of output 104 [2021-08-30 16:24:29,512 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 22 treesize of output 18 [2021-08-30 16:24:29,516 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-30 16:24:29,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2021-08-30 16:24:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 19 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:29,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175368796] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:29,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:29,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 62 [2021-08-30 16:24:29,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088966362] [2021-08-30 16:24:29,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-30 16:24:29,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-30 16:24:29,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3584, Unknown=0, NotChecked=0, Total=3782 [2021-08-30 16:24:29,834 INFO L87 Difference]: Start difference. First operand 1071 states and 1189 transitions. Second operand has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 58 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:34,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:34,759 INFO L93 Difference]: Finished difference Result 1461 states and 1600 transitions. [2021-08-30 16:24:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-30 16:24:34,760 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 58 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-30 16:24:34,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:34,762 INFO L225 Difference]: With dead ends: 1461 [2021-08-30 16:24:34,762 INFO L226 Difference]: Without dead ends: 1396 [2021-08-30 16:24:34,763 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 134 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 19341.20ms TimeCoverageRelationStatistics Valid=464, Invalid=8089, Unknown=3, NotChecked=0, Total=8556 [2021-08-30 16:24:34,763 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1783 IncrementalHoareTripleChecker+Unchecked, 441.96ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:34,764 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 184 Invalid, 3270 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [17 Valid, 1470 Invalid, 0 Unknown, 1783 Unchecked, 441.96ms Time] [2021-08-30 16:24:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-30 16:24:34,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1366. [2021-08-30 16:24:34,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1346 states have (on average 1.1047548291233285) internal successors, (1487), 1347 states have internal predecessors, (1487), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1505 transitions. [2021-08-30 16:24:34,775 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1505 transitions. Word has length 85 [2021-08-30 16:24:34,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:34,775 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1505 transitions. [2021-08-30 16:24:34,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.6065573770491803) internal successors, (220), 58 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1505 transitions. [2021-08-30 16:24:34,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-30 16:24:34,777 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:34,778 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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] [2021-08-30 16:24:34,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:34,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-30 16:24:34,993 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -877831076, now seen corresponding path program 2 times [2021-08-30 16:24:34,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:34,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466218660] [2021-08-30 16:24:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:34,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:24:35,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:35,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466218660] [2021-08-30 16:24:35,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466218660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:35,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142282383] [2021-08-30 16:24:35,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:24:35,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:35,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:35,212 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:35,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-30 16:24:35,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:24:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:24:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:24:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:35,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:24:36,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:24:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:24:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:36,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-08-30 16:24:36,362 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 32 treesize of output 28 [2021-08-30 16:24:36,711 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-30 16:24:36,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142282383] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:36,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:36,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-08-30 16:24:36,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118601457] [2021-08-30 16:24:36,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:24:36,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:36,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:24:36,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:24:36,713 INFO L87 Difference]: Start difference. First operand 1366 states and 1505 transitions. Second operand has 49 states, 46 states have (on average 4.065217391304348) internal successors, (187), 45 states have internal predecessors, (187), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:37,700 INFO L93 Difference]: Finished difference Result 1457 states and 1585 transitions. [2021-08-30 16:24:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:24:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 4.065217391304348) internal successors, (187), 45 states have internal predecessors, (187), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-08-30 16:24:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:37,703 INFO L225 Difference]: With dead ends: 1457 [2021-08-30 16:24:37,703 INFO L226 Difference]: Without dead ends: 1367 [2021-08-30 16:24:37,704 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 957.27ms TimeCoverageRelationStatistics Valid=369, Invalid=3791, Unknown=0, NotChecked=0, Total=4160 [2021-08-30 16:24:37,704 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 218 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 547.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.34ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 662.92ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:37,704 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 143 Invalid, 2547 Unknown, 0 Unchecked, 4.34ms Time], IncrementalHoareTripleChecker [34 Valid, 2169 Invalid, 0 Unknown, 344 Unchecked, 662.92ms Time] [2021-08-30 16:24:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-08-30 16:24:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1306. [2021-08-30 16:24:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1287 states have (on average 1.0994560994560996) internal successors, (1415), 1288 states have internal predecessors, (1415), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1432 transitions. [2021-08-30 16:24:37,716 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1432 transitions. Word has length 88 [2021-08-30 16:24:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:37,716 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 1432 transitions. [2021-08-30 16:24:37,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 4.065217391304348) internal successors, (187), 45 states have internal predecessors, (187), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1432 transitions. [2021-08-30 16:24:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-30 16:24:37,718 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:37,718 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:24:37,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:37,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-30 16:24:37,925 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:37,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1030247833, now seen corresponding path program 7 times [2021-08-30 16:24:37,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:37,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652147271] [2021-08-30 16:24:37,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:37,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:38,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:38,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:38,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652147271] [2021-08-30 16:24:38,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652147271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:38,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207310768] [2021-08-30 16:24:38,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:24:38,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:38,069 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:38,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-30 16:24:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:38,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-30 16:24:38,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:38,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:38,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:24:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:24:38,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207310768] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:38,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:38,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2021-08-30 16:24:38,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82330764] [2021-08-30 16:24:38,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-30 16:24:38,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-30 16:24:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-30 16:24:38,859 INFO L87 Difference]: Start difference. First operand 1306 states and 1432 transitions. Second operand has 32 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:39,622 INFO L93 Difference]: Finished difference Result 2253 states and 2482 transitions. [2021-08-30 16:24:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-30 16:24:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-08-30 16:24:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:39,626 INFO L225 Difference]: With dead ends: 2253 [2021-08-30 16:24:39,627 INFO L226 Difference]: Without dead ends: 2253 [2021-08-30 16:24:39,627 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 428.27ms TimeCoverageRelationStatistics Valid=228, Invalid=1494, Unknown=0, NotChecked=0, Total=1722 [2021-08-30 16:24:39,627 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 223 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 503.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.75ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 610.79ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:39,627 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 64 Invalid, 2064 Unknown, 0 Unchecked, 3.75ms Time], IncrementalHoareTripleChecker [20 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 610.79ms Time] [2021-08-30 16:24:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-08-30 16:24:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1487. [2021-08-30 16:24:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1468 states have (on average 1.1001362397820162) internal successors, (1615), 1469 states have internal predecessors, (1615), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 1632 transitions. [2021-08-30 16:24:39,642 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 1632 transitions. Word has length 89 [2021-08-30 16:24:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:39,643 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 1632 transitions. [2021-08-30 16:24:39,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.870967741935484) internal successors, (182), 28 states have internal predecessors, (182), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 1632 transitions. [2021-08-30 16:24:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-30 16:24:39,649 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:39,649 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:24:39,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:39,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:39,861 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -359311565, now seen corresponding path program 8 times [2021-08-30 16:24:39,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:39,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171537083] [2021-08-30 16:24:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:39,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:24:40,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:40,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171537083] [2021-08-30 16:24:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171537083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:40,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020236586] [2021-08-30 16:24:40,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:24:40,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:40,361 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:40,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-30 16:24:40,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:24:40,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:24:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:24:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:40,479 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 [2021-08-30 16:24:40,694 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 [2021-08-30 16:24:40,735 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:24:40,735 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 [2021-08-30 16:24:41,456 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:24:41,457 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 [2021-08-30 16:24:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:24:41,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:24:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:24:43,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:24:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:24:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020236586] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:24:44,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:24:44,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 15] total 44 [2021-08-30 16:24:44,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749780610] [2021-08-30 16:24:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-30 16:24:44,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:24:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-30 16:24:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1765, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:24:44,013 INFO L87 Difference]: Start difference. First operand 1487 states and 1632 transitions. Second operand has 44 states, 42 states have (on average 4.428571428571429) internal successors, (186), 40 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:24:45,263 INFO L93 Difference]: Finished difference Result 1450 states and 1590 transitions. [2021-08-30 16:24:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-30 16:24:45,279 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 4.428571428571429) internal successors, (186), 40 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-08-30 16:24:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:24:45,282 INFO L225 Difference]: With dead ends: 1450 [2021-08-30 16:24:45,282 INFO L226 Difference]: Without dead ends: 1425 [2021-08-30 16:24:45,283 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 3805.57ms TimeCoverageRelationStatistics Valid=378, Invalid=4314, Unknown=0, NotChecked=0, Total=4692 [2021-08-30 16:24:45,283 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 206 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.90ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 414.42ms IncrementalHoareTripleChecker+Time [2021-08-30 16:24:45,283 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 151 Invalid, 1702 Unknown, 0 Unchecked, 2.90ms Time], IncrementalHoareTripleChecker [41 Valid, 1244 Invalid, 0 Unknown, 417 Unchecked, 414.42ms Time] [2021-08-30 16:24:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-08-30 16:24:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1422. [2021-08-30 16:24:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1403 states have (on average 1.1012116892373485) internal successors, (1545), 1404 states have internal predecessors, (1545), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1562 transitions. [2021-08-30 16:24:45,294 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1562 transitions. Word has length 95 [2021-08-30 16:24:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:24:45,294 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 1562 transitions. [2021-08-30 16:24:45,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 4.428571428571429) internal successors, (186), 40 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:24:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1562 transitions. [2021-08-30 16:24:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-30 16:24:45,297 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:24:45,297 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:24:45,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-30 16:24:45,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-30 16:24:45,513 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:24:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:24:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 495270427, now seen corresponding path program 9 times [2021-08-30 16:24:45,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:24:45,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499764196] [2021-08-30 16:24:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:24:45,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:24:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:46,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:24:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:24:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:24:46,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:24:46,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499764196] [2021-08-30 16:24:46,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499764196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:24:46,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364622136] [2021-08-30 16:24:46,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:24:46,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:24:46,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:24:46,206 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:24:46,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-30 16:24:46,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-30 16:24:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:24:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-30 16:24:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:24:46,330 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 [2021-08-30 16:24:46,759 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 [2021-08-30 16:24:46,815 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:24:46,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-30 16:24:48,899 INFO L354 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2021-08-30 16:24:48,899 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 59 treesize of output 45 [2021-08-30 16:24:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:24:48,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:00,125 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (cstrpbrk_~s~0.base Int)) (let ((.cse1 (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset c_main_~length2~0) 0)))) (let ((.cse0 (select (select .cse1 cstrpbrk_~s~0.base) main_~nondetString2~0.offset))) (or (not (= .cse0 (select (select .cse1 c_main_~nondetString1~0.base) (+ 3 c_main_~nondetString1~0.offset)))) (= .cse0 0))))) is different from false [2021-08-30 16:25:00,132 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:25:00,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 368 [2021-08-30 16:25:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 113 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-30 16:25:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364622136] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:00,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:00,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 24] total 76 [2021-08-30 16:25:00,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029711781] [2021-08-30 16:25:00,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-30 16:25:00,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-30 16:25:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5279, Unknown=20, NotChecked=146, Total=5700 [2021-08-30 16:25:00,588 INFO L87 Difference]: Start difference. First operand 1422 states and 1562 transitions. Second operand has 76 states, 73 states have (on average 3.287671232876712) internal successors, (240), 72 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:10,768 WARN L838 $PredicateComparison]: unable to prove that (and (not (let ((.cse0 (select |c_#memory_int| c_cstrpbrk_~sc1~0.base))) (= (select .cse0 c_cstrpbrk_~sc1~0.offset) (select .cse0 3)))) (= c_cstrpbrk_~s2.base c_cstrpbrk_~s~0.base) (= c_cstrpbrk_~s2.offset c_cstrpbrk_~s~0.offset) (= |c_cstrpbrk_#in~s1.offset| 0) (= (select (select |c_#memory_int| |c_cstrpbrk_#in~s1.base|) 3) 0) (forall ((cstrpbrk_~s~0.base Int)) (let ((.cse1 (select (select |c_#memory_int| cstrpbrk_~s~0.base) c_cstrpbrk_~s2.offset))) (or (not (= (select (select |c_#memory_int| c_cstrpbrk_~sc1~0.base) (+ c_cstrpbrk_~sc1~0.offset 3)) .cse1)) (= .cse1 0)))) (= |c_old(#valid)| |c_#valid|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (= c_cstrpbrk_~sc1~0.offset 0) (= |c_old(#NULL.base)| |c_#NULL.base|)) is different from false [2021-08-30 16:25:25,524 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_cstrpbrk_#t~mem9| (select (select |c_#memory_int| c_cstrpbrk_~s2.base) c_cstrpbrk_~s2.offset)) (not (= c_cstrpbrk_~c~0 (select (select |c_#memory_int| c_cstrpbrk_~sc1~0.base) 3))) (forall ((cstrpbrk_~s~0.base Int)) (let ((.cse0 (select (select |c_#memory_int| cstrpbrk_~s~0.base) c_cstrpbrk_~s2.offset))) (or (not (= (select (select |c_#memory_int| c_cstrpbrk_~sc1~0.base) (+ c_cstrpbrk_~sc1~0.offset 3)) .cse0)) (= .cse0 0)))) (= c_cstrpbrk_~sc1~0.offset 0)) is different from false [2021-08-30 16:25:25,996 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (select (select |c_#memory_int| c_cstrpbrk_~s2.base) c_cstrpbrk_~s2.offset) (select (select |c_#memory_int| c_cstrpbrk_~sc1~0.base) 3))) (forall ((cstrpbrk_~s~0.base Int)) (let ((.cse0 (select (select |c_#memory_int| cstrpbrk_~s~0.base) c_cstrpbrk_~s2.offset))) (or (not (= (select (select |c_#memory_int| c_cstrpbrk_~sc1~0.base) (+ c_cstrpbrk_~sc1~0.offset 3)) .cse0)) (= .cse0 0)))) (= c_cstrpbrk_~sc1~0.offset 0)) is different from false [2021-08-30 16:25:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:27,792 INFO L93 Difference]: Finished difference Result 1974 states and 2169 transitions. [2021-08-30 16:25:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-30 16:25:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 73 states have (on average 3.287671232876712) internal successors, (240), 72 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-08-30 16:25:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:27,796 INFO L225 Difference]: With dead ends: 1974 [2021-08-30 16:25:27,796 INFO L226 Difference]: Without dead ends: 1964 [2021-08-30 16:25:27,797 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3411 ImplicationChecksByTransitivity, 39079.33ms TimeCoverageRelationStatistics Valid=791, Invalid=16207, Unknown=48, NotChecked=1044, Total=18090 [2021-08-30 16:25:27,797 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 233 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 702.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 5241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.47ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2638 IncrementalHoareTripleChecker+Unchecked, 837.79ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:27,798 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 289 Invalid, 5241 Unknown, 0 Unchecked, 7.47ms Time], IncrementalHoareTripleChecker [62 Valid, 2541 Invalid, 0 Unknown, 2638 Unchecked, 837.79ms Time] [2021-08-30 16:25:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-08-30 16:25:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1732. [2021-08-30 16:25:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1713 states have (on average 1.1015761821366024) internal successors, (1887), 1714 states have internal predecessors, (1887), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 1904 transitions. [2021-08-30 16:25:27,810 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 1904 transitions. Word has length 95 [2021-08-30 16:25:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:27,811 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 1904 transitions. [2021-08-30 16:25:27,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 73 states have (on average 3.287671232876712) internal successors, (240), 72 states have internal predecessors, (240), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 1904 transitions. [2021-08-30 16:25:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-30 16:25:27,813 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:27,813 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:25:27,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:28,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-30 16:25:28,029 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:28,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1134304997, now seen corresponding path program 10 times [2021-08-30 16:25:28,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:28,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601827626] [2021-08-30 16:25:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:28,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:25:28,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601827626] [2021-08-30 16:25:28,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601827626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864513985] [2021-08-30 16:25:28,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:25:28,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:28,705 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:28,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-30 16:25:28,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:25:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:25:28,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:25:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:28,812 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 [2021-08-30 16:25:28,816 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 [2021-08-30 16:25:29,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 16:25:29,216 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-30 16:25:29,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-08-30 16:25:30,064 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-30 16:25:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-08-30 16:25:30,072 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-08-30 16:25:30,072 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 42 treesize of output 28 [2021-08-30 16:25:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:25:30,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:32,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-08-30 16:25:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 92 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:25:32,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864513985] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:32,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:32,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16, 16] total 58 [2021-08-30 16:25:32,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833519013] [2021-08-30 16:25:32,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-30 16:25:32,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:32,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-30 16:25:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3116, Unknown=1, NotChecked=0, Total=3306 [2021-08-30 16:25:32,696 INFO L87 Difference]: Start difference. First operand 1732 states and 1904 transitions. Second operand has 58 states, 55 states have (on average 4.109090909090909) internal successors, (226), 54 states have internal predecessors, (226), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:34,829 INFO L93 Difference]: Finished difference Result 2466 states and 2712 transitions. [2021-08-30 16:25:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-30 16:25:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 4.109090909090909) internal successors, (226), 54 states have internal predecessors, (226), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-08-30 16:25:34,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:34,834 INFO L225 Difference]: With dead ends: 2466 [2021-08-30 16:25:34,834 INFO L226 Difference]: Without dead ends: 2445 [2021-08-30 16:25:34,835 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 4454.54ms TimeCoverageRelationStatistics Valid=660, Invalid=7895, Unknown=1, NotChecked=0, Total=8556 [2021-08-30 16:25:34,835 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 201 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 450.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 538.86ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:34,835 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 154 Invalid, 1884 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [53 Valid, 1570 Invalid, 0 Unknown, 261 Unchecked, 538.86ms Time] [2021-08-30 16:25:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-30 16:25:34,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2368. [2021-08-30 16:25:34,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2349 states have (on average 1.1042997020008514) internal successors, (2594), 2350 states have internal predecessors, (2594), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 2611 transitions. [2021-08-30 16:25:34,852 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 2611 transitions. Word has length 95 [2021-08-30 16:25:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:34,852 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 2611 transitions. [2021-08-30 16:25:34,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 4.109090909090909) internal successors, (226), 54 states have internal predecessors, (226), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 2611 transitions. [2021-08-30 16:25:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-30 16:25:34,855 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:34,855 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:34,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:35,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-30 16:25:35,069 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1513020627, now seen corresponding path program 11 times [2021-08-30 16:25:35,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:35,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819004748] [2021-08-30 16:25:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:35,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:35,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 139 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:35,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:35,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819004748] [2021-08-30 16:25:35,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819004748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:35,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602800449] [2021-08-30 16:25:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:25:35,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:35,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:35,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:35,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-30 16:25:35,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-30 16:25:35,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:25:35,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:25:35,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:35,419 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:25:35,419 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 [2021-08-30 16:25:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 176 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:36,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 176 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:36,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602800449] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:36,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:36,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 54 [2021-08-30 16:25:36,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338233724] [2021-08-30 16:25:36,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-30 16:25:36,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-30 16:25:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2432, Unknown=0, NotChecked=0, Total=2862 [2021-08-30 16:25:36,436 INFO L87 Difference]: Start difference. First operand 2368 states and 2611 transitions. Second operand has 54 states, 53 states have (on average 4.169811320754717) internal successors, (221), 50 states have internal predecessors, (221), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:37,295 INFO L93 Difference]: Finished difference Result 3700 states and 4035 transitions. [2021-08-30 16:25:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-30 16:25:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.169811320754717) internal successors, (221), 50 states have internal predecessors, (221), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-08-30 16:25:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:37,302 INFO L225 Difference]: With dead ends: 3700 [2021-08-30 16:25:37,302 INFO L226 Difference]: Without dead ends: 3514 [2021-08-30 16:25:37,303 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 828.06ms TimeCoverageRelationStatistics Valid=801, Invalid=4169, Unknown=0, NotChecked=0, Total=4970 [2021-08-30 16:25:37,303 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 326 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 491.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 595.08ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:37,303 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 51 Invalid, 1815 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [44 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 595.08ms Time] [2021-08-30 16:25:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-08-30 16:25:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2759. [2021-08-30 16:25:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2759 states, 2739 states have (on average 1.1055129609346477) internal successors, (3028), 2740 states have internal predecessors, (3028), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2759 states to 2759 states and 3046 transitions. [2021-08-30 16:25:37,323 INFO L78 Accepts]: Start accepts. Automaton has 2759 states and 3046 transitions. Word has length 97 [2021-08-30 16:25:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 2759 states and 3046 transitions. [2021-08-30 16:25:37,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.169811320754717) internal successors, (221), 50 states have internal predecessors, (221), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:37,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2759 states and 3046 transitions. [2021-08-30 16:25:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-30 16:25:37,326 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:37,326 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:37,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:37,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:37,527 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:37,527 INFO L82 PathProgramCache]: Analyzing trace with hash -982111594, now seen corresponding path program 12 times [2021-08-30 16:25:37,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:37,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149447839] [2021-08-30 16:25:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:37,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:37,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:37,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:37,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:37,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149447839] [2021-08-30 16:25:37,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149447839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:37,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778379167] [2021-08-30 16:25:37,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:25:37,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:37,802 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:37,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-30 16:25:37,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-30 16:25:37,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:25:37,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-30 16:25:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:38,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:25:38,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:25:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:38,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:38,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:25:38,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:25:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:38,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778379167] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:38,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:38,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 47 [2021-08-30 16:25:38,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434007027] [2021-08-30 16:25:38,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-30 16:25:38,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:38,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-30 16:25:38,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2021-08-30 16:25:38,815 INFO L87 Difference]: Start difference. First operand 2759 states and 3046 transitions. Second operand has 47 states, 44 states have (on average 3.727272727272727) internal successors, (164), 43 states have internal predecessors, (164), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:40,578 INFO L93 Difference]: Finished difference Result 4132 states and 4550 transitions. [2021-08-30 16:25:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 16:25:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 3.727272727272727) internal successors, (164), 43 states have internal predecessors, (164), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-08-30 16:25:40,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:40,584 INFO L225 Difference]: With dead ends: 4132 [2021-08-30 16:25:40,584 INFO L226 Difference]: Without dead ends: 4047 [2021-08-30 16:25:40,585 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1028.29ms TimeCoverageRelationStatistics Valid=335, Invalid=4357, Unknown=0, NotChecked=0, Total=4692 [2021-08-30 16:25:40,585 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 260 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 4614 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1063.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 1298.26ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:40,585 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 266 Invalid, 4975 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [32 Valid, 4614 Invalid, 0 Unknown, 329 Unchecked, 1298.26ms Time] [2021-08-30 16:25:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-08-30 16:25:40,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3223. [2021-08-30 16:25:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 3200 states have (on average 1.1078125) internal successors, (3545), 3201 states have internal predecessors, (3545), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 3566 transitions. [2021-08-30 16:25:40,613 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 3566 transitions. Word has length 101 [2021-08-30 16:25:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:40,613 INFO L470 AbstractCegarLoop]: Abstraction has 3223 states and 3566 transitions. [2021-08-30 16:25:40,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 3.727272727272727) internal successors, (164), 43 states have internal predecessors, (164), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 3566 transitions. [2021-08-30 16:25:40,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-30 16:25:40,616 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:40,616 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:40,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-30 16:25:40,825 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1902591143, now seen corresponding path program 11 times [2021-08-30 16:25:40,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:40,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644942325] [2021-08-30 16:25:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:40,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 67 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:25:41,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:41,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644942325] [2021-08-30 16:25:41,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644942325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:41,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373243196] [2021-08-30 16:25:41,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:25:41,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:41,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:41,310 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:41,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-30 16:25:41,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-30 16:25:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:25:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-30 16:25:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:41,436 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:25:41,436 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 [2021-08-30 16:25:41,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:25:41,876 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:25:41,876 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 [2021-08-30 16:25:43,247 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:25:43,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2021-08-30 16:25:44,216 INFO L354 Elim1Store]: treesize reduction 125, result has 8.8 percent of original size [2021-08-30 16:25:44,217 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 74 treesize of output 47 [2021-08-30 16:25:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:25:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:46,943 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-08-30 16:25:46,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 435 treesize of output 360 [2021-08-30 16:25:46,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:25:46,951 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 290 treesize of output 274 [2021-08-30 16:25:47,200 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 81 treesize of output 73 [2021-08-30 16:25:47,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-30 16:25:47,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:25:47,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-08-30 16:25:47,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705446339] [2021-08-30 16:25:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-30 16:25:47,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-30 16:25:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4845, Unknown=1, NotChecked=0, Total=5112 [2021-08-30 16:25:47,497 INFO L87 Difference]: Start difference. First operand 3223 states and 3566 transitions. Second operand has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:48,783 INFO L93 Difference]: Finished difference Result 3188 states and 3524 transitions. [2021-08-30 16:25:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-30 16:25:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 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 101 [2021-08-30 16:25:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:48,787 INFO L225 Difference]: With dead ends: 3188 [2021-08-30 16:25:48,787 INFO L226 Difference]: Without dead ends: 3051 [2021-08-30 16:25:48,787 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 4279.96ms TimeCoverageRelationStatistics Valid=399, Invalid=7082, Unknown=1, NotChecked=0, Total=7482 [2021-08-30 16:25:48,787 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 165 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 528.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 629.32ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:48,788 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 67 Invalid, 1690 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [25 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 629.32ms Time] [2021-08-30 16:25:48,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-08-30 16:25:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3048. [2021-08-30 16:25:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3048 states, 3026 states have (on average 1.1107072042300066) internal successors, (3361), 3027 states have internal predecessors, (3361), 19 states have call successors, (19), 19 states have call predecessors, (19), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 3381 transitions. [2021-08-30 16:25:48,809 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 3381 transitions. Word has length 101 [2021-08-30 16:25:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:48,809 INFO L470 AbstractCegarLoop]: Abstraction has 3048 states and 3381 transitions. [2021-08-30 16:25:48,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:48,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 3381 transitions. [2021-08-30 16:25:48,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-30 16:25:48,812 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:48,812 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:48,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:49,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:49,029 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1952660917, now seen corresponding path program 8 times [2021-08-30 16:25:49,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:49,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539003580] [2021-08-30 16:25:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:49,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:49,443 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:49,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:49,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539003580] [2021-08-30 16:25:49,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539003580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:49,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048898810] [2021-08-30 16:25:49,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:25:49,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:49,445 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:49,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-30 16:25:49,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:25:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:25:49,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-30 16:25:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:49,571 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 [2021-08-30 16:25:49,823 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 [2021-08-30 16:25:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-08-30 16:25:51,840 INFO L354 Elim1Store]: treesize reduction 129, result has 5.8 percent of original size [2021-08-30 16:25:51,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 37 [2021-08-30 16:25:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:51,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:53,997 INFO L354 Elim1Store]: treesize reduction 62, result has 32.6 percent of original size [2021-08-30 16:25:53,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 396 treesize of output 323 [2021-08-30 16:25:54,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:25:54,004 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 279 treesize of output 263 [2021-08-30 16:25:54,019 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 315 treesize of output 299 [2021-08-30 16:25:54,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:25:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:25:54,118 INFO L354 Elim1Store]: treesize reduction 9, result has 79.1 percent of original size [2021-08-30 16:25:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 105 treesize of output 109 [2021-08-30 16:25:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 21 proven. 142 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:54,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048898810] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:54,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:54,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 69 [2021-08-30 16:25:54,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441420017] [2021-08-30 16:25:54,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-30 16:25:54,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-30 16:25:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4423, Unknown=0, NotChecked=0, Total=4692 [2021-08-30 16:25:54,668 INFO L87 Difference]: Start difference. First operand 3048 states and 3381 transitions. Second operand has 69 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 65 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:56,510 INFO L93 Difference]: Finished difference Result 3944 states and 4353 transitions. [2021-08-30 16:25:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 16:25:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 65 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-08-30 16:25:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:56,514 INFO L225 Difference]: With dead ends: 3944 [2021-08-30 16:25:56,514 INFO L226 Difference]: Without dead ends: 3862 [2021-08-30 16:25:56,515 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 4583.33ms TimeCoverageRelationStatistics Valid=524, Invalid=8596, Unknown=0, NotChecked=0, Total=9120 [2021-08-30 16:25:56,515 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 241 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 2076 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 574.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 4276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2164 IncrementalHoareTripleChecker+Unchecked, 688.94ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:56,515 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 223 Invalid, 4276 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [36 Valid, 2076 Invalid, 0 Unknown, 2164 Unchecked, 688.94ms Time] [2021-08-30 16:25:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-08-30 16:25:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3850. [2021-08-30 16:25:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3850 states, 3821 states have (on average 1.1080868882491495) internal successors, (4234), 3822 states have internal predecessors, (4234), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3850 states to 3850 states and 4261 transitions. [2021-08-30 16:25:56,546 INFO L78 Accepts]: Start accepts. Automaton has 3850 states and 4261 transitions. Word has length 102 [2021-08-30 16:25:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:56,546 INFO L470 AbstractCegarLoop]: Abstraction has 3850 states and 4261 transitions. [2021-08-30 16:25:56,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 65 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3850 states and 4261 transitions. [2021-08-30 16:25:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-30 16:25:56,549 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:56,550 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:56,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:56,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-30 16:25:56,765 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:56,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:56,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2097864409, now seen corresponding path program 13 times [2021-08-30 16:25:56,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:56,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116780808] [2021-08-30 16:25:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:56,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:57,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:25:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:57,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:25:57,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116780808] [2021-08-30 16:25:57,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116780808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:25:57,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209987340] [2021-08-30 16:25:57,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:25:57,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:25:57,063 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:25:57,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-30 16:25:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:25:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-30 16:25:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:25:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:25:58,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:25:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:25:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209987340] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:25:58,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:25:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 51 [2021-08-30 16:25:58,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144048050] [2021-08-30 16:25:58,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:25:58,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:25:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:25:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2382, Unknown=0, NotChecked=0, Total=2652 [2021-08-30 16:25:58,193 INFO L87 Difference]: Start difference. First operand 3850 states and 4261 transitions. Second operand has 52 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:25:59,584 INFO L93 Difference]: Finished difference Result 5244 states and 5775 transitions. [2021-08-30 16:25:59,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-30 16:25:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-30 16:25:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:25:59,589 INFO L225 Difference]: With dead ends: 5244 [2021-08-30 16:25:59,589 INFO L226 Difference]: Without dead ends: 5244 [2021-08-30 16:25:59,590 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 952.92ms TimeCoverageRelationStatistics Valid=500, Invalid=3790, Unknown=0, NotChecked=0, Total=4290 [2021-08-30 16:25:59,590 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 707 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 3527 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 3587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1087.82ms IncrementalHoareTripleChecker+Time [2021-08-30 16:25:59,590 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [707 Valid, 74 Invalid, 3587 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [60 Valid, 3527 Invalid, 0 Unknown, 0 Unchecked, 1087.82ms Time] [2021-08-30 16:25:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2021-08-30 16:25:59,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 4515. [2021-08-30 16:25:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4515 states, 4486 states have (on average 1.1141328577797593) internal successors, (4998), 4487 states have internal predecessors, (4998), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4515 states to 4515 states and 5025 transitions. [2021-08-30 16:25:59,652 INFO L78 Accepts]: Start accepts. Automaton has 4515 states and 5025 transitions. Word has length 105 [2021-08-30 16:25:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:25:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 4515 states and 5025 transitions. [2021-08-30 16:25:59,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 4.375) internal successors, (210), 48 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:25:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4515 states and 5025 transitions. [2021-08-30 16:25:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-30 16:25:59,656 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:25:59,656 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:25:59,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-30 16:25:59,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:25:59,861 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:25:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:25:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2121060118, now seen corresponding path program 12 times [2021-08-30 16:25:59,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:25:59,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532239429] [2021-08-30 16:25:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:25:59,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:25:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:00,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:26:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:00,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:26:00,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532239429] [2021-08-30 16:26:00,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532239429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:26:00,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738111563] [2021-08-30 16:26:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:26:00,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:26:00,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:26:00,062 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:26:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-30 16:26:00,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-30 16:26:00,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:26:00,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-30 16:26:00,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:26:00,203 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 [2021-08-30 16:26:00,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 16:26:00,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-08-30 16:26:02,495 INFO L354 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2021-08-30 16:26:02,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 37 [2021-08-30 16:26:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:26:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:26:05,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:26:05,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 142 [2021-08-30 16:26:05,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-08-30 16:26:05,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:26:05,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:26:05,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 179 [2021-08-30 16:26:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 26 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:26:06,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738111563] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:26:06,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:26:06,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29, 26] total 67 [2021-08-30 16:26:06,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866358723] [2021-08-30 16:26:06,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-30 16:26:06,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:26:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-30 16:26:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4139, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:26:06,380 INFO L87 Difference]: Start difference. First operand 4515 states and 5025 transitions. Second operand has 67 states, 66 states have (on average 4.0) internal successors, (264), 63 states have internal predecessors, (264), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:26:07,175 INFO L93 Difference]: Finished difference Result 4700 states and 5217 transitions. [2021-08-30 16:26:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-30 16:26:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.0) internal successors, (264), 63 states have internal predecessors, (264), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-30 16:26:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:26:07,180 INFO L225 Difference]: With dead ends: 4700 [2021-08-30 16:26:07,180 INFO L226 Difference]: Without dead ends: 4477 [2021-08-30 16:26:07,180 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 4277.85ms TimeCoverageRelationStatistics Valid=383, Invalid=5623, Unknown=0, NotChecked=0, Total=6006 [2021-08-30 16:26:07,181 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 85 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 356.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.85ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 428.30ms IncrementalHoareTripleChecker+Time [2021-08-30 16:26:07,181 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 124 Invalid, 1640 Unknown, 0 Unchecked, 2.85ms Time], IncrementalHoareTripleChecker [14 Valid, 1344 Invalid, 0 Unknown, 282 Unchecked, 428.30ms Time] [2021-08-30 16:26:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4477 states. [2021-08-30 16:26:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4477 to 4401. [2021-08-30 16:26:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 4372 states have (on average 1.114821591948765) internal successors, (4874), 4373 states have internal predecessors, (4874), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 4901 transitions. [2021-08-30 16:26:07,213 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 4901 transitions. Word has length 105 [2021-08-30 16:26:07,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:26:07,214 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 4901 transitions. [2021-08-30 16:26:07,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.0) internal successors, (264), 63 states have internal predecessors, (264), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 4901 transitions. [2021-08-30 16:26:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-30 16:26:07,217 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:26:07,217 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:26:07,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-30 16:26:07,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-30 16:26:07,433 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:26:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:26:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -64072446, now seen corresponding path program 13 times [2021-08-30 16:26:07,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:26:07,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45127888] [2021-08-30 16:26:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:26:07,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:26:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:07,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:26:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:07,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:26:07,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45127888] [2021-08-30 16:26:07,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45127888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:26:07,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176566450] [2021-08-30 16:26:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:26:07,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:26:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:26:07,641 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:26:07,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-30 16:26:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-30 16:26:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:26:07,749 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 [2021-08-30 16:26:07,948 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 [2021-08-30 16:26:07,981 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:26:07,981 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 [2021-08-30 16:26:08,740 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:26:08,741 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 [2021-08-30 16:26:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:08,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:26:11,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:26:11,235 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 26 treesize of output 22 [2021-08-30 16:26:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 67 proven. 72 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:11,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176566450] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:26:11,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:26:11,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 38 [2021-08-30 16:26:11,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653792772] [2021-08-30 16:26:11,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 16:26:11,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:26:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 16:26:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:26:11,433 INFO L87 Difference]: Start difference. First operand 4401 states and 4901 transitions. Second operand has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 34 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:26:11,942 INFO L93 Difference]: Finished difference Result 4440 states and 4935 transitions. [2021-08-30 16:26:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 16:26:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 34 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-30 16:26:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:26:11,947 INFO L225 Difference]: With dead ends: 4440 [2021-08-30 16:26:11,947 INFO L226 Difference]: Without dead ends: 4415 [2021-08-30 16:26:11,947 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 3130.14ms TimeCoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:26:11,947 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.73ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 217.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:26:11,948 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 109 Invalid, 1078 Unknown, 0 Unchecked, 1.73ms Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 355 Unchecked, 217.72ms Time] [2021-08-30 16:26:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4415 states. [2021-08-30 16:26:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4415 to 4401. [2021-08-30 16:26:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4401 states, 4372 states have (on average 1.1136779505946934) internal successors, (4869), 4373 states have internal predecessors, (4869), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 4896 transitions. [2021-08-30 16:26:11,980 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 4896 transitions. Word has length 105 [2021-08-30 16:26:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:26:11,980 INFO L470 AbstractCegarLoop]: Abstraction has 4401 states and 4896 transitions. [2021-08-30 16:26:11,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.972972972972973) internal successors, (184), 34 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 4896 transitions. [2021-08-30 16:26:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-30 16:26:11,984 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:26:11,984 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:26:12,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-30 16:26:12,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-30 16:26:12,205 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:26:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:26:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1703443154, now seen corresponding path program 14 times [2021-08-30 16:26:12,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:26:12,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649557664] [2021-08-30 16:26:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:26:12,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:26:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:12,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:26:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 132 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:12,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:26:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649557664] [2021-08-30 16:26:12,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649557664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:26:12,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865905189] [2021-08-30 16:26:12,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:26:12,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:26:12,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:26:12,528 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:26:12,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-30 16:26:12,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:26:12,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:26:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-30 16:26:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:26:12,633 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 [2021-08-30 16:26:12,871 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 28 treesize of output 24 [2021-08-30 16:26:12,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-08-30 16:26:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:26:14,893 INFO L354 Elim1Store]: treesize reduction 119, result has 6.3 percent of original size [2021-08-30 16:26:14,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 46 [2021-08-30 16:26:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 132 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:14,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:26:16,999 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-08-30 16:26:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 437 treesize of output 362 [2021-08-30 16:26:17,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:26:17,008 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 300 treesize of output 284 [2021-08-30 16:26:17,011 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 284 treesize of output 280 [2021-08-30 16:26:17,035 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 116 treesize of output 110 [2021-08-30 16:26:17,114 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 103 treesize of output 97 [2021-08-30 16:26:17,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:26:17,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:26:17,173 INFO L354 Elim1Store]: treesize reduction 9, result has 80.0 percent of original size [2021-08-30 16:26:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 106 treesize of output 104 [2021-08-30 16:26:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 1 proven. 138 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:17,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865905189] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:26:17,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:26:17,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 75 [2021-08-30 16:26:17,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127439292] [2021-08-30 16:26:17,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-30 16:26:17,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:26:17,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-30 16:26:17,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=5134, Unknown=1, NotChecked=0, Total=5550 [2021-08-30 16:26:17,666 INFO L87 Difference]: Start difference. First operand 4401 states and 4896 transitions. Second operand has 75 states, 73 states have (on average 3.26027397260274) internal successors, (238), 71 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:29,005 WARN L210 SmtUtils]: Spent 10.55s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-08-30 16:26:34,656 WARN L210 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-08-30 16:26:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:26:36,362 INFO L93 Difference]: Finished difference Result 5570 states and 6184 transitions. [2021-08-30 16:26:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-30 16:26:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 3.26027397260274) internal successors, (238), 71 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-30 16:26:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:26:36,367 INFO L225 Difference]: With dead ends: 5570 [2021-08-30 16:26:36,368 INFO L226 Difference]: Without dead ends: 5560 [2021-08-30 16:26:36,369 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 163 SyntacticMatches, 8 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2765 ImplicationChecksByTransitivity, 20496.05ms TimeCoverageRelationStatistics Valid=813, Invalid=11618, Unknown=1, NotChecked=0, Total=12432 [2021-08-30 16:26:36,369 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 377 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 2875 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 877.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.45ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 603 IncrementalHoareTripleChecker+Unchecked, 1045.93ms IncrementalHoareTripleChecker+Time [2021-08-30 16:26:36,369 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 136 Invalid, 3534 Unknown, 0 Unchecked, 6.45ms Time], IncrementalHoareTripleChecker [56 Valid, 2875 Invalid, 0 Unknown, 603 Unchecked, 1045.93ms Time] [2021-08-30 16:26:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2021-08-30 16:26:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 4336. [2021-08-30 16:26:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4307 states have (on average 1.1153935453912236) internal successors, (4804), 4308 states have internal predecessors, (4804), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:36,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 4831 transitions. [2021-08-30 16:26:36,421 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 4831 transitions. Word has length 105 [2021-08-30 16:26:36,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:26:36,421 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 4831 transitions. [2021-08-30 16:26:36,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 3.26027397260274) internal successors, (238), 71 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:36,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 4831 transitions. [2021-08-30 16:26:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-30 16:26:36,425 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:26:36,425 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:26:36,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-30 16:26:36,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-30 16:26:36,641 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:26:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:26:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 737579242, now seen corresponding path program 15 times [2021-08-30 16:26:36,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:26:36,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777511448] [2021-08-30 16:26:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:26:36,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:26:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:26:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 132 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-30 16:26:36,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:26:36,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777511448] [2021-08-30 16:26:36,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777511448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:26:36,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17201311] [2021-08-30 16:26:36,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:26:36,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:26:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:26:36,981 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:26:36,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-30 16:26:37,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-30 16:26:37,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:26:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-30 16:26:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:26:37,104 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 [2021-08-30 16:26:37,692 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 [2021-08-30 16:26:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2021-08-30 16:26:39,758 INFO L354 Elim1Store]: treesize reduction 62, result has 4.6 percent of original size [2021-08-30 16:26:39,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 36 [2021-08-30 16:26:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 150 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:26:39,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:26:40,265 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:26:40,266 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 167 [2021-08-30 16:26:40,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:26:40,270 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 163 treesize of output 157 [2021-08-30 16:26:40,278 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-08-30 16:26:40,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 129 [2021-08-30 16:26:40,318 INFO L354 Elim1Store]: treesize reduction 9, result has 74.3 percent of original size [2021-08-30 16:26:40,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 85 treesize of output 93 [2021-08-30 16:26:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 10 proven. 147 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-30 16:26:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17201311] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:26:41,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:26:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 73 [2021-08-30 16:26:41,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468116386] [2021-08-30 16:26:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-30 16:26:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:26:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-30 16:26:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=4948, Unknown=0, NotChecked=0, Total=5256 [2021-08-30 16:26:41,722 INFO L87 Difference]: Start difference. First operand 4336 states and 4831 transitions. Second operand has 73 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 69 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:26:44,306 INFO L93 Difference]: Finished difference Result 4653 states and 5172 transitions. [2021-08-30 16:26:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-30 16:26:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 69 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2021-08-30 16:26:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:26:44,309 INFO L225 Difference]: With dead ends: 4653 [2021-08-30 16:26:44,309 INFO L226 Difference]: Without dead ends: 4641 [2021-08-30 16:26:44,309 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 3249.42ms TimeCoverageRelationStatistics Valid=691, Invalid=11965, Unknown=0, NotChecked=0, Total=12656 [2021-08-30 16:26:44,310 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 297 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 4120 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1193.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 5215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.08ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 1419.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:26:44,310 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 151 Invalid, 5215 Unknown, 0 Unchecked, 8.08ms Time], IncrementalHoareTripleChecker [58 Valid, 4120 Invalid, 0 Unknown, 1037 Unchecked, 1419.71ms Time] [2021-08-30 16:26:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-08-30 16:26:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4154. [2021-08-30 16:26:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4125 states have (on average 1.1146666666666667) internal successors, (4598), 4126 states have internal predecessors, (4598), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 4625 transitions. [2021-08-30 16:26:44,338 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 4625 transitions. Word has length 105 [2021-08-30 16:26:44,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:26:44,338 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 4625 transitions. [2021-08-30 16:26:44,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 3.4507042253521125) internal successors, (245), 69 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:26:44,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 4625 transitions. [2021-08-30 16:26:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-30 16:26:44,341 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:26:44,341 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:26:44,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-30 16:26:44,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-30 16:26:44,542 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:26:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:26:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1692635886, now seen corresponding path program 9 times [2021-08-30 16:26:44,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:26:44,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799495916] [2021-08-30 16:26:44,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:26:44,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:26:44,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:44,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:26:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:26:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:26:44,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:26:44,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799495916] [2021-08-30 16:26:44,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799495916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:26:44,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900902623] [2021-08-30 16:26:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:26:44,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:26:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:26:44,695 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:26:44,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-30 16:26:44,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-30 16:26:44,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:26:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-30 16:26:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:26:44,829 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 [2021-08-30 16:26:44,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 16:26:44,990 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 [2021-08-30 16:26:45,021 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:26:45,021 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 [2021-08-30 16:26:46,182 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-08-30 16:26:46,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 83 [2021-08-30 16:26:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-08-30 16:26:46,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:26:48,988 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:26:48,988 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 387 treesize of output 351 [2021-08-30 16:26:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-08-30 16:26:49,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900902623] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:26:49,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:26:49,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-08-30 16:26:49,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137707677] [2021-08-30 16:26:49,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-30 16:26:49,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:26:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-30 16:26:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1771, Unknown=1, NotChecked=0, Total=1980 [2021-08-30 16:26:49,232 INFO L87 Difference]: Start difference. First operand 4154 states and 4625 transitions. Second operand has 45 states, 42 states have (on average 4.404761904761905) internal successors, (185), 41 states have internal predecessors, (185), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:11,416 INFO L93 Difference]: Finished difference Result 4682 states and 5182 transitions. [2021-08-30 16:27:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-30 16:27:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 4.404761904761905) internal successors, (185), 41 states have internal predecessors, (185), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-08-30 16:27:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:11,419 INFO L225 Difference]: With dead ends: 4682 [2021-08-30 16:27:11,420 INFO L226 Difference]: Without dead ends: 4599 [2021-08-30 16:27:11,420 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 23787.47ms TimeCoverageRelationStatistics Valid=1193, Invalid=8906, Unknown=1, NotChecked=0, Total=10100 [2021-08-30 16:27:11,420 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 304.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:11,421 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 85 Invalid, 1283 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [14 Valid, 922 Invalid, 0 Unknown, 347 Unchecked, 304.72ms Time] [2021-08-30 16:27:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-08-30 16:27:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4336. [2021-08-30 16:27:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4308 states have (on average 1.1135097493036212) internal successors, (4797), 4309 states have internal predecessors, (4797), 25 states have call successors, (25), 25 states have call predecessors, (25), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 4823 transitions. [2021-08-30 16:27:11,450 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 4823 transitions. Word has length 106 [2021-08-30 16:27:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:11,451 INFO L470 AbstractCegarLoop]: Abstraction has 4336 states and 4823 transitions. [2021-08-30 16:27:11,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 4.404761904761905) internal successors, (185), 41 states have internal predecessors, (185), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 4823 transitions. [2021-08-30 16:27:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:27:11,454 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:11,454 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:27:11,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-30 16:27:11,663 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1495136589, now seen corresponding path program 14 times [2021-08-30 16:27:11,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:11,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433898712] [2021-08-30 16:27:11,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:11,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:27:11,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:11,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433898712] [2021-08-30 16:27:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433898712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:11,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680335454] [2021-08-30 16:27:11,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:27:11,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:11,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:11,998 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:11,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-30 16:27:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:27:12,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:12,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-30 16:27:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:12,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:27:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-30 16:27:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:27:12,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:12,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:27:12,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:27:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:27:12,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680335454] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:12,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:12,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 50 [2021-08-30 16:27:12,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512383061] [2021-08-30 16:27:12,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:27:12,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:27:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2300, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:27:12,985 INFO L87 Difference]: Start difference. First operand 4336 states and 4823 transitions. Second operand has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:15,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:15,208 INFO L93 Difference]: Finished difference Result 5767 states and 6364 transitions. [2021-08-30 16:27:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 16:27:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:27:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:15,212 INFO L225 Difference]: With dead ends: 5767 [2021-08-30 16:27:15,212 INFO L226 Difference]: Without dead ends: 5573 [2021-08-30 16:27:15,212 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1189.13ms TimeCoverageRelationStatistics Valid=350, Invalid=5052, Unknown=0, NotChecked=0, Total=5402 [2021-08-30 16:27:15,213 INFO L928 BasicCegarLoop]: 10 mSDtfsCounter, 329 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 5955 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1375.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 6427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.98ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 1684.82ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:15,213 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 331 Invalid, 6427 Unknown, 0 Unchecked, 9.98ms Time], IncrementalHoareTripleChecker [45 Valid, 5955 Invalid, 0 Unknown, 427 Unchecked, 1684.82ms Time] [2021-08-30 16:27:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2021-08-30 16:27:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 5153. [2021-08-30 16:27:15,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 5122 states have (on average 1.114213197969543) internal successors, (5707), 5123 states have internal predecessors, (5707), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:15,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 5736 transitions. [2021-08-30 16:27:15,250 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 5736 transitions. Word has length 111 [2021-08-30 16:27:15,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:15,250 INFO L470 AbstractCegarLoop]: Abstraction has 5153 states and 5736 transitions. [2021-08-30 16:27:15,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:15,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 5736 transitions. [2021-08-30 16:27:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:27:15,255 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:15,255 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:27:15,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:15,456 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:15,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:15,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1069048630, now seen corresponding path program 16 times [2021-08-30 16:27:15,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:15,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046192047] [2021-08-30 16:27:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:15,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:15,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:15,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:15,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046192047] [2021-08-30 16:27:15,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046192047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:15,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710962076] [2021-08-30 16:27:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:27:15,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:15,638 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:15,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-30 16:27:15,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:27:15,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 109 conjunts are in the unsatisfiable core [2021-08-30 16:27:15,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:15,757 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:27:15,758 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 [2021-08-30 16:27:15,782 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 [2021-08-30 16:27:15,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-08-30 16:27:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-30 16:27:16,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 32 [2021-08-30 16:27:19,263 INFO L354 Elim1Store]: treesize reduction 186, result has 6.1 percent of original size [2021-08-30 16:27:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 83 treesize of output 47 [2021-08-30 16:27:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 180 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:27:19,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:20,813 INFO L354 Elim1Store]: treesize reduction 123, result has 25.5 percent of original size [2021-08-30 16:27:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 618 treesize of output 503 [2021-08-30 16:27:20,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:27:20,821 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 415 treesize of output 389 [2021-08-30 16:27:20,854 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 301 treesize of output 273 [2021-08-30 16:27:20,971 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 341 treesize of output 309 [2021-08-30 16:27:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:21,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:21,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:21,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:21,088 INFO L354 Elim1Store]: treesize reduction 29, result has 61.8 percent of original size [2021-08-30 16:27:21,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 155 [2021-08-30 16:27:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 64 proven. 123 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:27:22,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710962076] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:22,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:22,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 33, 33] total 78 [2021-08-30 16:27:22,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108672133] [2021-08-30 16:27:22,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-30 16:27:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-30 16:27:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=5634, Unknown=0, NotChecked=0, Total=6006 [2021-08-30 16:27:22,711 INFO L87 Difference]: Start difference. First operand 5153 states and 5736 transitions. Second operand has 78 states, 76 states have (on average 3.539473684210526) internal successors, (269), 74 states have internal predecessors, (269), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:26,810 INFO L93 Difference]: Finished difference Result 5801 states and 6401 transitions. [2021-08-30 16:27:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-30 16:27:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 76 states have (on average 3.539473684210526) internal successors, (269), 74 states have internal predecessors, (269), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:27:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:26,814 INFO L225 Difference]: With dead ends: 5801 [2021-08-30 16:27:26,814 INFO L226 Difference]: Without dead ends: 5242 [2021-08-30 16:27:26,815 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 176 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4284 ImplicationChecksByTransitivity, 6261.91ms TimeCoverageRelationStatistics Valid=1257, Invalid=18483, Unknown=0, NotChecked=0, Total=19740 [2021-08-30 16:27:26,816 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 199 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 667.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.33ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1402 IncrementalHoareTripleChecker+Unchecked, 791.03ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:26,816 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 164 Invalid, 3551 Unknown, 0 Unchecked, 5.33ms Time], IncrementalHoareTripleChecker [28 Valid, 2121 Invalid, 0 Unknown, 1402 Unchecked, 791.03ms Time] [2021-08-30 16:27:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5242 states. [2021-08-30 16:27:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5242 to 4875. [2021-08-30 16:27:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4844 states have (on average 1.1137489677952106) internal successors, (5395), 4845 states have internal predecessors, (5395), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 5424 transitions. [2021-08-30 16:27:26,853 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 5424 transitions. Word has length 111 [2021-08-30 16:27:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:26,854 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 5424 transitions. [2021-08-30 16:27:26,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 76 states have (on average 3.539473684210526) internal successors, (269), 74 states have internal predecessors, (269), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 5424 transitions. [2021-08-30 16:27:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:27:26,857 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:26,857 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:27:26,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:27,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-30 16:27:27,071 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:27,071 INFO L82 PathProgramCache]: Analyzing trace with hash -896608226, now seen corresponding path program 17 times [2021-08-30 16:27:27,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:27,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554817543] [2021-08-30 16:27:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:27,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:27,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:27,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554817543] [2021-08-30 16:27:27,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554817543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:27,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970984472] [2021-08-30 16:27:27,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:27:27,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:27,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:27,253 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:27,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-30 16:27:27,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-30 16:27:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-30 16:27:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:27,381 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:27:27,381 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 [2021-08-30 16:27:27,388 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 [2021-08-30 16:27:27,704 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 [2021-08-30 16:27:27,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-30 16:27:29,252 INFO L354 Elim1Store]: treesize reduction 69, result has 25.0 percent of original size [2021-08-30 16:27:29,253 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 [2021-08-30 16:27:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 6 proven. 181 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:27:29,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:32,196 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:27:32,196 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:27:32,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:27:32,202 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 173 treesize of output 167 [2021-08-30 16:27:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:32,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2021-08-30 16:27:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:27:32,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:27:32,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 84 [2021-08-30 16:27:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 18 proven. 163 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-30 16:27:32,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970984472] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:32,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:32,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 24] total 63 [2021-08-30 16:27:32,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389302267] [2021-08-30 16:27:32,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-30 16:27:32,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-30 16:27:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3604, Unknown=1, NotChecked=0, Total=3906 [2021-08-30 16:27:32,670 INFO L87 Difference]: Start difference. First operand 4875 states and 5424 transitions. Second operand has 63 states, 61 states have (on average 4.39344262295082) internal successors, (268), 59 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:39,673 INFO L93 Difference]: Finished difference Result 7887 states and 8732 transitions. [2021-08-30 16:27:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-08-30 16:27:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 4.39344262295082) internal successors, (268), 59 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:27:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:39,678 INFO L225 Difference]: With dead ends: 7887 [2021-08-30 16:27:39,678 INFO L226 Difference]: Without dead ends: 7537 [2021-08-30 16:27:39,680 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9270 ImplicationChecksByTransitivity, 9119.15ms TimeCoverageRelationStatistics Valid=2140, Invalid=32269, Unknown=1, NotChecked=0, Total=34410 [2021-08-30 16:27:39,680 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 271 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 921.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.63ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 1098.98ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:39,680 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 127 Invalid, 4153 Unknown, 0 Unchecked, 6.63ms Time], IncrementalHoareTripleChecker [46 Valid, 2936 Invalid, 0 Unknown, 1171 Unchecked, 1098.98ms Time] [2021-08-30 16:27:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2021-08-30 16:27:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 4785. [2021-08-30 16:27:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4785 states, 4754 states have (on average 1.1148506520824568) internal successors, (5300), 4755 states have internal predecessors, (5300), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4785 states to 4785 states and 5329 transitions. [2021-08-30 16:27:39,723 INFO L78 Accepts]: Start accepts. Automaton has 4785 states and 5329 transitions. Word has length 111 [2021-08-30 16:27:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:39,723 INFO L470 AbstractCegarLoop]: Abstraction has 4785 states and 5329 transitions. [2021-08-30 16:27:39,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 4.39344262295082) internal successors, (268), 59 states have internal predecessors, (268), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4785 states and 5329 transitions. [2021-08-30 16:27:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:27:39,726 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:39,726 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:27:39,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:39,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:39,926 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:39,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:39,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1160379446, now seen corresponding path program 18 times [2021-08-30 16:27:39,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:39,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050221881] [2021-08-30 16:27:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:39,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 79 proven. 90 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:40,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:40,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050221881] [2021-08-30 16:27:40,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050221881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:40,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277275420] [2021-08-30 16:27:40,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:27:40,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:40,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:40,138 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-30 16:27:40,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-30 16:27:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-30 16:27:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:40,271 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 [2021-08-30 16:27:40,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 16:27:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-08-30 16:27:42,402 INFO L354 Elim1Store]: treesize reduction 72, result has 10.0 percent of original size [2021-08-30 16:27:42,403 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 52 treesize of output 34 [2021-08-30 16:27:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 174 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-30 16:27:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:43,592 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 (+ c_main_~nondetString2~0.offset 1)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 3 c_main_~nondetString1~0.offset)))))))) is different from false [2021-08-30 16:27:43,605 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:27:43,605 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 217 treesize of output 177 [2021-08-30 16:27:43,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:27:43,612 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 173 treesize of output 167 [2021-08-30 16:27:43,667 INFO L354 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2021-08-30 16:27:43,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-08-30 16:27:43,724 INFO L354 Elim1Store]: treesize reduction 13, result has 66.7 percent of original size [2021-08-30 16:27:43,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 84 treesize of output 88 [2021-08-30 16:27:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 10 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-30 16:27:44,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277275420] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:44,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:44,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 25] total 62 [2021-08-30 16:27:44,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641151751] [2021-08-30 16:27:44,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-30 16:27:44,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:44,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-30 16:27:44,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3473, Unknown=1, NotChecked=118, Total=3782 [2021-08-30 16:27:44,029 INFO L87 Difference]: Start difference. First operand 4785 states and 5329 transitions. Second operand has 62 states, 60 states have (on average 4.316666666666666) internal successors, (259), 58 states have internal predecessors, (259), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:46,344 INFO L93 Difference]: Finished difference Result 5380 states and 5965 transitions. [2021-08-30 16:27:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-30 16:27:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 4.316666666666666) internal successors, (259), 58 states have internal predecessors, (259), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:27:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:46,348 INFO L225 Difference]: With dead ends: 5380 [2021-08-30 16:27:46,348 INFO L226 Difference]: Without dead ends: 5320 [2021-08-30 16:27:46,349 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 3691.64ms TimeCoverageRelationStatistics Valid=488, Invalid=9021, Unknown=1, NotChecked=192, Total=9702 [2021-08-30 16:27:46,349 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 93 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 480.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.04ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 581.38ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:46,349 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 234 Invalid, 2342 Unknown, 0 Unchecked, 4.04ms Time], IncrementalHoareTripleChecker [16 Valid, 1973 Invalid, 0 Unknown, 353 Unchecked, 581.38ms Time] [2021-08-30 16:27:46,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5320 states. [2021-08-30 16:27:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5320 to 4772. [2021-08-30 16:27:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4772 states, 4741 states have (on average 1.1139000210925964) internal successors, (5281), 4742 states have internal predecessors, (5281), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:46,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4772 states to 4772 states and 5310 transitions. [2021-08-30 16:27:46,381 INFO L78 Accepts]: Start accepts. Automaton has 4772 states and 5310 transitions. Word has length 111 [2021-08-30 16:27:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:46,381 INFO L470 AbstractCegarLoop]: Abstraction has 4772 states and 5310 transitions. [2021-08-30 16:27:46,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 4.316666666666666) internal successors, (259), 58 states have internal predecessors, (259), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:46,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4772 states and 5310 transitions. [2021-08-30 16:27:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-30 16:27:46,384 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:46,384 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-08-30 16:27:46,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-30 16:27:46,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-30 16:27:46,585 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:46,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2014961438, now seen corresponding path program 19 times [2021-08-30 16:27:46,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:46,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215018506] [2021-08-30 16:27:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:46,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:46,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:46,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215018506] [2021-08-30 16:27:46,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215018506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:46,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069688622] [2021-08-30 16:27:46,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:27:46,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:46,781 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:46,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-30 16:27:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:27:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:46,932 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 [2021-08-30 16:27:47,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-08-30 16:27:47,174 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:27:47,174 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 [2021-08-30 16:27:48,059 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:27:48,060 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 [2021-08-30 16:27:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:48,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:27:49,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:27:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 55 proven. 114 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-30 16:27:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069688622] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:49,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:49,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 38 [2021-08-30 16:27:49,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593590099] [2021-08-30 16:27:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-30 16:27:49,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-30 16:27:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-08-30 16:27:49,924 INFO L87 Difference]: Start difference. First operand 4772 states and 5310 transitions. Second operand has 38 states, 37 states have (on average 5.081081081081081) internal successors, (188), 34 states have internal predecessors, (188), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:50,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:50,428 INFO L93 Difference]: Finished difference Result 4549 states and 5041 transitions. [2021-08-30 16:27:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:27:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 5.081081081081081) internal successors, (188), 34 states have internal predecessors, (188), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-08-30 16:27:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:50,431 INFO L225 Difference]: With dead ends: 4549 [2021-08-30 16:27:50,431 INFO L226 Difference]: Without dead ends: 4021 [2021-08-30 16:27:50,431 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2342.35ms TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:27:50,432 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 494 IncrementalHoareTripleChecker+Unchecked, 196.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:50,432 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 126 Invalid, 1129 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [17 Valid, 618 Invalid, 0 Unknown, 494 Unchecked, 196.01ms Time] [2021-08-30 16:27:50,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-08-30 16:27:50,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3665. [2021-08-30 16:27:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3639 states have (on average 1.1129431162407255) internal successors, (4050), 3640 states have internal predecessors, (4050), 23 states have call successors, (23), 23 states have call predecessors, (23), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 4074 transitions. [2021-08-30 16:27:50,455 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 4074 transitions. Word has length 111 [2021-08-30 16:27:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:50,455 INFO L470 AbstractCegarLoop]: Abstraction has 3665 states and 4074 transitions. [2021-08-30 16:27:50,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 5.081081081081081) internal successors, (188), 34 states have internal predecessors, (188), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 4074 transitions. [2021-08-30 16:27:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-30 16:27:50,458 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:50,458 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:27:50,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:50,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:50,658 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:50,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:50,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1320726754, now seen corresponding path program 20 times [2021-08-30 16:27:50,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:50,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317972028] [2021-08-30 16:27:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:50,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:50,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:27:50,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:50,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317972028] [2021-08-30 16:27:50,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317972028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:50,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650882168] [2021-08-30 16:27:50,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:27:50,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:50,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:50,877 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:50,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-30 16:27:50,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:27:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-30 16:27:50,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:51,003 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 [2021-08-30 16:27:51,218 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 [2021-08-30 16:27:51,253 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:27:51,253 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 [2021-08-30 16:27:52,128 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:27:52,128 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 [2021-08-30 16:27:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:27:52,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:27:52,860 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ c_main_~nondetString1~0.offset 4)) 0)) is different from false [2021-08-30 16:27:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-08-30 16:27:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:27:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650882168] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:27:53,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:27:53,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2021-08-30 16:27:53,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344648543] [2021-08-30 16:27:53,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-30 16:27:53,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:27:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-30 16:27:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1678, Unknown=1, NotChecked=82, Total=1892 [2021-08-30 16:27:53,104 INFO L87 Difference]: Start difference. First operand 3665 states and 4074 transitions. Second operand has 44 states, 42 states have (on average 5.238095238095238) internal successors, (220), 40 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:27:55,642 INFO L93 Difference]: Finished difference Result 3760 states and 4167 transitions. [2021-08-30 16:27:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:27:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 5.238095238095238) internal successors, (220), 40 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-08-30 16:27:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:27:55,645 INFO L225 Difference]: With dead ends: 3760 [2021-08-30 16:27:55,645 INFO L226 Difference]: Without dead ends: 3720 [2021-08-30 16:27:55,645 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 3446.79ms TimeCoverageRelationStatistics Valid=198, Invalid=2455, Unknown=3, NotChecked=100, Total=2756 [2021-08-30 16:27:55,645 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 104 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 247.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 302.02ms IncrementalHoareTripleChecker+Time [2021-08-30 16:27:55,646 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 92 Invalid, 1390 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [11 Valid, 1056 Invalid, 0 Unknown, 323 Unchecked, 302.02ms Time] [2021-08-30 16:27:55,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-08-30 16:27:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3717. [2021-08-30 16:27:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3717 states, 3691 states have (on average 1.1108100785694934) internal successors, (4100), 3692 states have internal predecessors, (4100), 23 states have call successors, (23), 23 states have call predecessors, (23), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 4124 transitions. [2021-08-30 16:27:55,679 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 4124 transitions. Word has length 112 [2021-08-30 16:27:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:27:55,679 INFO L470 AbstractCegarLoop]: Abstraction has 3717 states and 4124 transitions. [2021-08-30 16:27:55,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 5.238095238095238) internal successors, (220), 40 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:27:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 4124 transitions. [2021-08-30 16:27:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-30 16:27:55,682 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:27:55,682 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:27:55,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-30 16:27:55,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:55,897 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:27:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:27:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2095720186, now seen corresponding path program 21 times [2021-08-30 16:27:55,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:27:55,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30630578] [2021-08-30 16:27:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:27:55,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:27:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:56,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:27:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:27:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:27:56,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:27:56,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30630578] [2021-08-30 16:27:56,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30630578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:27:56,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659150350] [2021-08-30 16:27:56,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:27:56,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:27:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:27:56,306 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:27:56,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-30 16:27:56,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-30 16:27:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:27:56,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-30 16:27:56,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:27:56,450 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:27:56,451 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 [2021-08-30 16:27:56,455 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 [2021-08-30 16:27:56,626 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 [2021-08-30 16:27:56,664 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:27:56,664 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 [2021-08-30 16:28:00,026 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-08-30 16:28:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 83 [2021-08-30 16:28:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 38 proven. 17 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-30 16:28:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:28:03,332 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:28:03,333 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 387 treesize of output 351 [2021-08-30 16:28:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-08-30 16:28:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659150350] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:28:03,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:28:03,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 55 [2021-08-30 16:28:03,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102337129] [2021-08-30 16:28:03,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 16:28:03,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:28:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 16:28:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2792, Unknown=1, NotChecked=0, Total=2970 [2021-08-30 16:28:03,589 INFO L87 Difference]: Start difference. First operand 3717 states and 4124 transitions. Second operand has 55 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 51 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:28:14,706 INFO L93 Difference]: Finished difference Result 4367 states and 4816 transitions. [2021-08-30 16:28:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-30 16:28:14,706 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 51 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-08-30 16:28:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:28:14,709 INFO L225 Difference]: With dead ends: 4367 [2021-08-30 16:28:14,709 INFO L226 Difference]: Without dead ends: 4353 [2021-08-30 16:28:14,710 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 194 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 15115.13ms TimeCoverageRelationStatistics Valid=914, Invalid=13847, Unknown=1, NotChecked=0, Total=14762 [2021-08-30 16:28:14,710 INFO L928 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 433.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.27ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 522.72ms IncrementalHoareTripleChecker+Time [2021-08-30 16:28:14,710 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 148 Invalid, 2194 Unknown, 0 Unchecked, 3.27ms Time], IncrementalHoareTripleChecker [11 Valid, 1714 Invalid, 0 Unknown, 469 Unchecked, 522.72ms Time] [2021-08-30 16:28:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2021-08-30 16:28:14,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 3786. [2021-08-30 16:28:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3760 states have (on average 1.1135638297872341) internal successors, (4187), 3761 states have internal predecessors, (4187), 23 states have call successors, (23), 23 states have call predecessors, (23), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 4211 transitions. [2021-08-30 16:28:14,734 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 4211 transitions. Word has length 112 [2021-08-30 16:28:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:28:14,734 INFO L470 AbstractCegarLoop]: Abstraction has 3786 states and 4211 transitions. [2021-08-30 16:28:14,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.4716981132075473) internal successors, (184), 51 states have internal predecessors, (184), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 4211 transitions. [2021-08-30 16:28:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-30 16:28:14,737 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:28:14,737 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:28:14,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-30 16:28:14,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-30 16:28:14,941 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:28:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:28:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1832678864, now seen corresponding path program 15 times [2021-08-30 16:28:14,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:28:14,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346944823] [2021-08-30 16:28:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:28:14,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:28:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:15,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:28:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:28:15,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:28:15,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346944823] [2021-08-30 16:28:15,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346944823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:28:15,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497939220] [2021-08-30 16:28:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:28:15,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:28:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:28:15,265 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:28:15,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-30 16:28:15,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-30 16:28:15,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:28:15,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-30 16:28:15,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:28:15,434 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:28:15,434 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 [2021-08-30 16:28:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-30 16:28:15,849 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-30 16:28:15,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-08-30 16:28:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-30 16:28:15,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:28:16,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-08-30 16:28:16,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-30 16:28:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-08-30 16:28:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497939220] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:28:17,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:28:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 11] total 45 [2021-08-30 16:28:17,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952709990] [2021-08-30 16:28:17,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 16:28:17,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:28:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 16:28:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1841, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:28:17,062 INFO L87 Difference]: Start difference. First operand 3786 states and 4211 transitions. Second operand has 46 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:28:21,340 INFO L93 Difference]: Finished difference Result 4784 states and 5227 transitions. [2021-08-30 16:28:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-30 16:28:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-08-30 16:28:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:28:21,342 INFO L225 Difference]: With dead ends: 4784 [2021-08-30 16:28:21,342 INFO L226 Difference]: Without dead ends: 4123 [2021-08-30 16:28:21,343 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5741 ImplicationChecksByTransitivity, 3655.62ms TimeCoverageRelationStatistics Valid=2498, Invalid=17808, Unknown=0, NotChecked=0, Total=20306 [2021-08-30 16:28:21,344 INFO L928 BasicCegarLoop]: 8 mSDtfsCounter, 631 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1020.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.77ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 1232.52ms IncrementalHoareTripleChecker+Time [2021-08-30 16:28:21,344 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 63 Invalid, 4152 Unknown, 0 Unchecked, 7.77ms Time], IncrementalHoareTripleChecker [129 Valid, 3649 Invalid, 0 Unknown, 374 Unchecked, 1232.52ms Time] [2021-08-30 16:28:21,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-08-30 16:28:21,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 2613. [2021-08-30 16:28:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2593 states have (on average 1.1006556112610875) internal successors, (2854), 2593 states have internal predecessors, (2854), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 2873 transitions. [2021-08-30 16:28:21,364 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 2873 transitions. Word has length 115 [2021-08-30 16:28:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:28:21,364 INFO L470 AbstractCegarLoop]: Abstraction has 2613 states and 2873 transitions. [2021-08-30 16:28:21,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 4.0476190476190474) internal successors, (170), 42 states have internal predecessors, (170), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 2873 transitions. [2021-08-30 16:28:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-08-30 16:28:21,366 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:28:21,366 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:28:21,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-30 16:28:21,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-30 16:28:21,584 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:28:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:28:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1733906885, now seen corresponding path program 22 times [2021-08-30 16:28:21,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:28:21,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451306773] [2021-08-30 16:28:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:28:21,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:28:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:21,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:28:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 15 proven. 189 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:28:21,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:28:21,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451306773] [2021-08-30 16:28:21,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451306773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:28:21,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013308957] [2021-08-30 16:28:21,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:28:21,754 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:28:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:28:21,755 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:28:21,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-30 16:28:21,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:28:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:28:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-30 16:28:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:28:21,880 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:28:21,881 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 [2021-08-30 16:28:22,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-30 16:28:22,481 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:28:22,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-08-30 16:28:23,479 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-30 16:28:23,479 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 36 treesize of output 27 [2021-08-30 16:28:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:28:23,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:28:24,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-08-30 16:28:24,738 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 46 treesize of output 42 [2021-08-30 16:28:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:28:25,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013308957] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:28:25,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:28:25,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 22] total 59 [2021-08-30 16:28:25,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617164970] [2021-08-30 16:28:25,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-30 16:28:25,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:28:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-30 16:28:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=3176, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 16:28:25,779 INFO L87 Difference]: Start difference. First operand 2613 states and 2873 transitions. Second operand has 60 states, 58 states have (on average 5.310344827586207) internal successors, (308), 56 states have internal predecessors, (308), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:28:28,886 INFO L93 Difference]: Finished difference Result 4393 states and 4820 transitions. [2021-08-30 16:28:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-30 16:28:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 5.310344827586207) internal successors, (308), 56 states have internal predecessors, (308), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-08-30 16:28:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:28:28,889 INFO L225 Difference]: With dead ends: 4393 [2021-08-30 16:28:28,889 INFO L226 Difference]: Without dead ends: 4393 [2021-08-30 16:28:28,889 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 3865.84ms TimeCoverageRelationStatistics Valid=1387, Invalid=11269, Unknown=0, NotChecked=0, Total=12656 [2021-08-30 16:28:28,890 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 320 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 625.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1398 IncrementalHoareTripleChecker+Unchecked, 741.56ms IncrementalHoareTripleChecker+Time [2021-08-30 16:28:28,890 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 84 Invalid, 3326 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [31 Valid, 1897 Invalid, 0 Unknown, 1398 Unchecked, 741.56ms Time] [2021-08-30 16:28:28,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-08-30 16:28:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3098. [2021-08-30 16:28:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3098 states, 3078 states have (on average 1.0964912280701755) internal successors, (3375), 3078 states have internal predecessors, (3375), 18 states have call successors, (18), 18 states have call predecessors, (18), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3098 states to 3098 states and 3394 transitions. [2021-08-30 16:28:28,913 INFO L78 Accepts]: Start accepts. Automaton has 3098 states and 3394 transitions. Word has length 116 [2021-08-30 16:28:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:28:28,913 INFO L470 AbstractCegarLoop]: Abstraction has 3098 states and 3394 transitions. [2021-08-30 16:28:28,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 5.310344827586207) internal successors, (308), 56 states have internal predecessors, (308), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 3098 states and 3394 transitions. [2021-08-30 16:28:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-30 16:28:28,916 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:28:28,916 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:28:28,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-30 16:28:29,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-30 16:28:29,121 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:28:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:28:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1641830482, now seen corresponding path program 23 times [2021-08-30 16:28:29,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:28:29,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379783875] [2021-08-30 16:28:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:28:29,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:28:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:29,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:28:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:28:29,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:28:29,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379783875] [2021-08-30 16:28:29,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379783875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:28:29,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558716883] [2021-08-30 16:28:29,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:28:29,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:28:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:28:29,335 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:28:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-30 16:28:29,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-30 16:28:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:28:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 101 conjunts are in the unsatisfiable core [2021-08-30 16:28:29,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:28:29,465 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:28:29,466 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 [2021-08-30 16:28:30,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-30 16:28:30,078 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:28:30,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-30 16:28:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:28:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:28:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:28:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:28:32,589 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-08-30 16:28:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 65 treesize of output 43 [2021-08-30 16:28:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 15 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:28:32,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:28:34,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:28:34,739 INFO L354 Elim1Store]: treesize reduction 58, result has 35.6 percent of original size [2021-08-30 16:28:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 436 treesize of output 361 [2021-08-30 16:28:34,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:28:34,747 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 299 treesize of output 283 [2021-08-30 16:28:34,764 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 367 treesize of output 335 [2021-08-30 16:28:34,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:28:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:28:34,858 INFO L354 Elim1Store]: treesize reduction 15, result has 70.6 percent of original size [2021-08-30 16:28:34,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 125 treesize of output 119 [2021-08-30 16:28:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 28 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:28:36,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558716883] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:28:36,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:28:36,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 32, 32] total 80 [2021-08-30 16:28:36,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771734102] [2021-08-30 16:28:36,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-30 16:28:36,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:28:36,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-30 16:28:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=5832, Unknown=0, NotChecked=0, Total=6320 [2021-08-30 16:28:36,690 INFO L87 Difference]: Start difference. First operand 3098 states and 3394 transitions. Second operand has 80 states, 78 states have (on average 4.089743589743589) internal successors, (319), 76 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:28:55,458 INFO L93 Difference]: Finished difference Result 5384 states and 5864 transitions. [2021-08-30 16:28:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-08-30 16:28:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 4.089743589743589) internal successors, (319), 76 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-08-30 16:28:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:28:55,461 INFO L225 Difference]: With dead ends: 5384 [2021-08-30 16:28:55,461 INFO L226 Difference]: Without dead ends: 3332 [2021-08-30 16:28:55,463 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22658 ImplicationChecksByTransitivity, 18421.93ms TimeCoverageRelationStatistics Valid=4853, Invalid=68317, Unknown=0, NotChecked=0, Total=73170 [2021-08-30 16:28:55,464 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 1121 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 7544 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2787.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 9538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.00ms SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 7544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1745 IncrementalHoareTripleChecker+Unchecked, 3269.38ms IncrementalHoareTripleChecker+Time [2021-08-30 16:28:55,464 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1121 Valid, 143 Invalid, 9538 Unknown, 0 Unchecked, 18.00ms Time], IncrementalHoareTripleChecker [249 Valid, 7544 Invalid, 0 Unknown, 1745 Unchecked, 3269.38ms Time] [2021-08-30 16:28:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2021-08-30 16:28:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2644. [2021-08-30 16:28:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2631 states have (on average 1.0995819080197644) internal successors, (2893), 2631 states have internal predecessors, (2893), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 2905 transitions. [2021-08-30 16:28:55,481 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 2905 transitions. Word has length 118 [2021-08-30 16:28:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:28:55,481 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 2905 transitions. [2021-08-30 16:28:55,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 4.089743589743589) internal successors, (319), 76 states have internal predecessors, (319), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:28:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 2905 transitions. [2021-08-30 16:28:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-30 16:28:55,482 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:28:55,482 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:28:55,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-30 16:28:55,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-30 16:28:55,683 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:28:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:28:55,683 INFO L82 PathProgramCache]: Analyzing trace with hash -596149142, now seen corresponding path program 24 times [2021-08-30 16:28:55,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:28:55,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168163350] [2021-08-30 16:28:55,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:28:55,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:28:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:55,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:28:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:28:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:28:55,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:28:55,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168163350] [2021-08-30 16:28:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168163350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:28:55,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160244300] [2021-08-30 16:28:55,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:28:55,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:28:55,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:28:55,901 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:28:55,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-30 16:28:56,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-30 16:28:56,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:28:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-30 16:28:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:28:56,057 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 [2021-08-30 16:28:56,290 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 [2021-08-30 16:28:56,325 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:28:56,325 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 [2021-08-30 16:28:58,056 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-08-30 16:28:58,057 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 53 treesize of output 56 [2021-08-30 16:28:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 14 proven. 208 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:28:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:29:11,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:29:11,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:29:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 9 proven. 213 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-30 16:29:11,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160244300] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:29:11,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:29:11,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 22] total 55 [2021-08-30 16:29:11,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934813989] [2021-08-30 16:29:11,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 16:29:11,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:29:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 16:29:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2800, Unknown=0, NotChecked=0, Total=2970 [2021-08-30 16:29:11,434 INFO L87 Difference]: Start difference. First operand 2644 states and 2905 transitions. Second operand has 55 states, 54 states have (on average 4.7592592592592595) internal successors, (257), 51 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:29:11,996 INFO L93 Difference]: Finished difference Result 2652 states and 2912 transitions. [2021-08-30 16:29:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:29:11,996 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.7592592592592595) internal successors, (257), 51 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-08-30 16:29:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:29:11,998 INFO L225 Difference]: With dead ends: 2652 [2021-08-30 16:29:11,998 INFO L226 Difference]: Without dead ends: 2647 [2021-08-30 16:29:11,998 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 14118.08ms TimeCoverageRelationStatistics Valid=251, Invalid=3909, Unknown=0, NotChecked=0, Total=4160 [2021-08-30 16:29:11,999 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 205.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.74ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 249.74ms IncrementalHoareTripleChecker+Time [2021-08-30 16:29:11,999 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 119 Invalid, 1217 Unknown, 0 Unchecked, 1.74ms Time], IncrementalHoareTripleChecker [13 Valid, 845 Invalid, 0 Unknown, 359 Unchecked, 249.74ms Time] [2021-08-30 16:29:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-08-30 16:29:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2644. [2021-08-30 16:29:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2631 states have (on average 1.0992018244013684) internal successors, (2892), 2631 states have internal predecessors, (2892), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 2904 transitions. [2021-08-30 16:29:12,014 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 2904 transitions. Word has length 118 [2021-08-30 16:29:12,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:29:12,015 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 2904 transitions. [2021-08-30 16:29:12,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.7592592592592595) internal successors, (257), 51 states have internal predecessors, (257), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 2904 transitions. [2021-08-30 16:29:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-30 16:29:12,017 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:29:12,017 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:29:12,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-30 16:29:12,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:12,223 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:29:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:29:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 316784466, now seen corresponding path program 25 times [2021-08-30 16:29:12,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:29:12,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866775299] [2021-08-30 16:29:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:29:12,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:29:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:29:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:29:12,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:29:12,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866775299] [2021-08-30 16:29:12,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866775299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:29:12,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085849421] [2021-08-30 16:29:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:29:12,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:12,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:29:12,540 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:29:12,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-30 16:29:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:12,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-30 16:29:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:29:12,662 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:29:12,662 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 [2021-08-30 16:29:13,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:29:13,126 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-30 16:29:13,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-08-30 16:29:14,228 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-30 16:29:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 34 [2021-08-30 16:29:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:29:14,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:29:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2021-08-30 16:29:14,737 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 33 treesize of output 29 [2021-08-30 16:29:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-30 16:29:15,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085849421] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:29:15,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:29:15,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 57 [2021-08-30 16:29:15,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913803000] [2021-08-30 16:29:15,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-30 16:29:15,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:29:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-30 16:29:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2925, Unknown=0, NotChecked=0, Total=3192 [2021-08-30 16:29:15,408 INFO L87 Difference]: Start difference. First operand 2644 states and 2904 transitions. Second operand has 57 states, 56 states have (on average 4.910714285714286) internal successors, (275), 53 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:29:16,196 INFO L93 Difference]: Finished difference Result 2652 states and 2911 transitions. [2021-08-30 16:29:16,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-30 16:29:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.910714285714286) internal successors, (275), 53 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-08-30 16:29:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:29:16,198 INFO L225 Difference]: With dead ends: 2652 [2021-08-30 16:29:16,198 INFO L226 Difference]: Without dead ends: 2647 [2021-08-30 16:29:16,198 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 1813.28ms TimeCoverageRelationStatistics Valid=453, Invalid=4659, Unknown=0, NotChecked=0, Total=5112 [2021-08-30 16:29:16,199 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 229.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 277.41ms IncrementalHoareTripleChecker+Time [2021-08-30 16:29:16,199 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 1225 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [13 Valid, 883 Invalid, 0 Unknown, 329 Unchecked, 277.41ms Time] [2021-08-30 16:29:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2021-08-30 16:29:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2644. [2021-08-30 16:29:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2631 states have (on average 1.0988217407829723) internal successors, (2891), 2631 states have internal predecessors, (2891), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 2903 transitions. [2021-08-30 16:29:16,215 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 2903 transitions. Word has length 118 [2021-08-30 16:29:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:29:16,215 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 2903 transitions. [2021-08-30 16:29:16,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.910714285714286) internal successors, (275), 53 states have internal predecessors, (275), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 2903 transitions. [2021-08-30 16:29:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-08-30 16:29:16,217 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:29:16,217 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:29:16,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-30 16:29:16,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:16,425 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:29:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:29:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -290958905, now seen corresponding path program 26 times [2021-08-30 16:29:16,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:29:16,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253917237] [2021-08-30 16:29:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:29:16,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:29:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:16,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:29:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 15 proven. 219 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:29:16,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:29:16,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253917237] [2021-08-30 16:29:16,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253917237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:29:16,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066333173] [2021-08-30 16:29:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:29:16,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:29:16,580 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:29:16,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-30 16:29:16,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:29:16,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:29:16,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:29:16,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:29:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:29:17,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:29:17,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:29:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 28 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-30 16:29:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066333173] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:29:17,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:29:17,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2021-08-30 16:29:17,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908458750] [2021-08-30 16:29:17,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:29:17,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:29:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:29:17,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:29:17,624 INFO L87 Difference]: Start difference. First operand 2644 states and 2903 transitions. Second operand has 36 states, 35 states have (on average 6.285714285714286) internal successors, (220), 32 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:29:18,514 INFO L93 Difference]: Finished difference Result 3472 states and 3802 transitions. [2021-08-30 16:29:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 16:29:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 6.285714285714286) internal successors, (220), 32 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-08-30 16:29:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:29:18,517 INFO L225 Difference]: With dead ends: 3472 [2021-08-30 16:29:18,517 INFO L226 Difference]: Without dead ends: 3472 [2021-08-30 16:29:18,517 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 513.08ms TimeCoverageRelationStatistics Valid=275, Invalid=1887, Unknown=0, NotChecked=0, Total=2162 [2021-08-30 16:29:18,517 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 189 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 578.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.07ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 706.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:29:18,517 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 80 Invalid, 2269 Unknown, 0 Unchecked, 4.07ms Time], IncrementalHoareTripleChecker [16 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 706.48ms Time] [2021-08-30 16:29:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-08-30 16:29:18,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2086. [2021-08-30 16:29:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2073 states have (on average 1.0988904968644477) internal successors, (2278), 2073 states have internal predecessors, (2278), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 2290 transitions. [2021-08-30 16:29:18,534 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 2290 transitions. Word has length 122 [2021-08-30 16:29:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:29:18,534 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 2290 transitions. [2021-08-30 16:29:18,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 6.285714285714286) internal successors, (220), 32 states have internal predecessors, (220), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 2290 transitions. [2021-08-30 16:29:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-30 16:29:18,535 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:29:18,535 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:29:18,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-30 16:29:18,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:18,736 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:29:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:29:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1781506914, now seen corresponding path program 27 times [2021-08-30 16:29:18,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:29:18,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777595742] [2021-08-30 16:29:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:29:18,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:29:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:19,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:29:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:29:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 9 proven. 262 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:29:19,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:29:19,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777595742] [2021-08-30 16:29:19,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777595742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:29:19,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110033890] [2021-08-30 16:29:19,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:29:19,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:19,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:29:19,407 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:29:19,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-30 16:29:19,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-30 16:29:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:29:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-30 16:29:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:29:19,561 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:29:19,561 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 [2021-08-30 16:29:19,569 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 [2021-08-30 16:29:19,748 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 [2021-08-30 16:29:19,790 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:29:19,790 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 [2021-08-30 16:29:21,429 INFO L354 Elim1Store]: treesize reduction 42, result has 57.6 percent of original size [2021-08-30 16:29:21,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 83 [2021-08-30 16:29:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 85 proven. 17 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-30 16:29:21,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:29:25,026 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-08-30 16:29:25,026 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 387 treesize of output 351 [2021-08-30 16:29:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 4 proven. 98 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-08-30 16:29:25,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110033890] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:29:25,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:29:25,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15, 15] total 61 [2021-08-30 16:29:25,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903760011] [2021-08-30 16:29:25,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-30 16:29:25,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:29:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-30 16:29:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3468, Unknown=1, NotChecked=0, Total=3660 [2021-08-30 16:29:25,301 INFO L87 Difference]: Start difference. First operand 2086 states and 2290 transitions. Second operand has 61 states, 59 states have (on average 3.610169491525424) internal successors, (213), 57 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:29:43,051 INFO L93 Difference]: Finished difference Result 2096 states and 2292 transitions. [2021-08-30 16:29:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-30 16:29:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 3.610169491525424) internal successors, (213), 57 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-08-30 16:29:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:29:43,052 INFO L225 Difference]: With dead ends: 2096 [2021-08-30 16:29:43,052 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:29:43,053 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 223 SyntacticMatches, 6 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3306 ImplicationChecksByTransitivity, 20338.11ms TimeCoverageRelationStatistics Valid=997, Invalid=16824, Unknown=1, NotChecked=0, Total=17822 [2021-08-30 16:29:43,053 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 314.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 377.76ms IncrementalHoareTripleChecker+Time [2021-08-30 16:29:43,053 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 1423 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [6 Valid, 1172 Invalid, 0 Unknown, 245 Unchecked, 377.76ms Time] [2021-08-30 16:29:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:29:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:29:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 16:29:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:29:43,054 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 124 [2021-08-30 16:29:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:29:43,054 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:29:43,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 3.610169491525424) internal successors, (213), 57 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:29:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:29:43,054 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:29:43,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-08-30 16:29:43,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-08-30 16:29:43,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-08-30 16:29:43,056 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (8 of 19 remaining) [2021-08-30 16:29:43,057 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (7 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (6 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (5 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION (4 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION (3 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION (2 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION (1 of 19 remaining) [2021-08-30 16:29:43,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-08-30 16:29:43,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-30 16:29:43,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:29:43,279 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:29:43,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:29:43 BoogieIcfgContainer [2021-08-30 16:29:43,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:29:43,281 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:29:43,281 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:29:43,281 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:29:43,282 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:22:12" (3/4) ... [2021-08-30 16:29:43,284 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:29:43,288 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:29:43,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-30 16:29:43,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-30 16:29:43,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-30 16:29:43,293 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:29:43,318 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:29:43,318 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:29:43,319 INFO L158 Benchmark]: Toolchain (without parser) took 451417.70ms. Allocated memory was 58.7MB in the beginning and 264.2MB in the end (delta: 205.5MB). Free memory was 36.1MB in the beginning and 96.8MB in the end (delta: -60.7MB). Peak memory consumption was 144.3MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,319 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 44.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:29:43,319 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.38ms. Allocated memory is still 58.7MB. Free memory was 35.8MB in the beginning and 36.5MB in the end (delta: -682.1kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,319 INFO L158 Benchmark]: Boogie Preprocessor took 56.08ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 34.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,320 INFO L158 Benchmark]: RCFGBuilder took 356.00ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 33.9MB in the beginning and 44.9MB in the end (delta: -11.0MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,320 INFO L158 Benchmark]: TraceAbstraction took 450720.15ms. Allocated memory was 71.3MB in the beginning and 264.2MB in the end (delta: 192.9MB). Free memory was 44.6MB in the beginning and 101.0MB in the end (delta: -56.4MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,320 INFO L158 Benchmark]: Witness Printer took 37.49ms. Allocated memory is still 264.2MB. Free memory was 101.0MB in the beginning and 96.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 16:29:43,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 58.7MB. Free memory was 40.6MB in the beginning and 40.5MB in the end (delta: 44.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.38ms. Allocated memory is still 58.7MB. Free memory was 35.8MB in the beginning and 36.5MB in the end (delta: -682.1kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.08ms. Allocated memory is still 58.7MB. Free memory was 36.5MB in the beginning and 34.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 356.00ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 33.9MB in the beginning and 44.9MB in the end (delta: -11.0MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. * TraceAbstraction took 450720.15ms. Allocated memory was 71.3MB in the beginning and 264.2MB in the end (delta: 192.9MB). Free memory was 44.6MB in the beginning and 101.0MB in the end (delta: -56.4MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. * Witness Printer took 37.49ms. Allocated memory is still 264.2MB. Free memory was 101.0MB in the beginning and 96.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 450680.08ms, OverallIterations: 74, TraceHistogramMax: 9, EmptinessCheckTime: 114.22ms, AutomataDifference: 200879.03ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.58ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14466 SdHoareTripleChecker+Valid, 36023.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14453 mSDsluCounter, 6832 SdHoareTripleChecker+Invalid, 29851.12ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 26271 IncrementalHoareTripleChecker+Unchecked, 24737 mSDsCounter, 2085 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 105556 IncrementalHoareTripleChecker+Invalid, 133912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2085 mSolverCounterUnsat, 395 mSDtfsCounter, 105556 mSolverCounterSat, 264.70ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12494 GetRequests, 7983 SyntacticMatches, 117 SemanticMatches, 4394 ConstructedPredicates, 9 IntricatePredicates, 22 DeprecatedPredicates, 103299 ImplicationChecksByTransitivity, 292135.97ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5153occurred in iteration=61, InterpolantAutomatonStates: 2343, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 1008.17ms AutomataMinimizationTime, 74 MinimizatonAttempts, 17843 StatesRemovedByMinimization, 65 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 506.01ms SsaConstructionTime, 2638.70ms SatisfiabilityAnalysisTime, 224301.70ms InterpolantComputationTime, 9710 NumberOfCodeBlocks, 9628 NumberOfCodeBlocksAsserted, 246 NumberOfCheckSat, 14147 ConstructedInterpolants, 2444 QuantifiedInterpolants, 230460 SizeOfPredicates, 1048 NumberOfNonLiveVariables, 17401 ConjunctsInSsa, 2815 ConjunctsInUnsatCore, 182 InterpolantComputations, 19 PerfectInterpolantSequences, 7437/22126 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! [2021-08-30 16:29:43,528 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 [2021-08-30 16:29:43,561 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...