./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 22:31:31,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 22:31:31,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 22:31:31,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 22:31:31,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 22:31:31,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 22:31:31,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 22:31:31,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 22:31:31,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 22:31:31,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 22:31:31,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 22:31:31,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 22:31:31,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 22:31:31,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 22:31:31,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 22:31:31,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 22:31:31,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 22:31:31,305 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 22:31:31,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 22:31:31,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 22:31:31,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 22:31:31,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 22:31:31,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 22:31:31,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 22:31:31,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 22:31:31,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 22:31:31,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 22:31:31,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 22:31:31,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 22:31:31,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 22:31:31,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 22:31:31,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 22:31:31,325 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 22:31:31,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 22:31:31,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 22:31:31,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 22:31:31,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 22:31:31,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 22:31:31,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 22:31:31,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 22:31:31,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 22:31:31,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-11-15 22:31:31,348 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 22:31:31,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 22:31:31,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 22:31:31,350 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 22:31:31,350 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 22:31:31,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 22:31:31,351 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 22:31:31,351 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 22:31:31,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 22:31:31,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 22:31:31,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 22:31:31,352 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-15 22:31:31,352 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-15 22:31:31,353 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-15 22:31:31,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 22:31:31,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 22:31:31,353 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 22:31:31,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 22:31:31,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 22:31:31,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 22:31:31,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 22:31:31,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:31:31,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 22:31:31,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 22:31:31,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 22:31:31,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 22:31:31,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d [2019-11-15 22:31:31,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 22:31:31,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 22:31:31,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 22:31:31,427 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 22:31:31,429 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 22:31:31,430 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2019-11-15 22:31:31,495 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/data/4d89f3f9a/39a041e0103444f4aa77aae3be811693/FLAG9c240218e [2019-11-15 22:31:31,968 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 22:31:31,968 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2019-11-15 22:31:31,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/data/4d89f3f9a/39a041e0103444f4aa77aae3be811693/FLAG9c240218e [2019-11-15 22:31:32,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/data/4d89f3f9a/39a041e0103444f4aa77aae3be811693 [2019-11-15 22:31:32,326 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 22:31:32,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-15 22:31:32,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 22:31:32,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 22:31:32,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 22:31:32,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:31:32" (1/1) ... [2019-11-15 22:31:32,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f62b472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:32, skipping insertion in model container [2019-11-15 22:31:32,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 10:31:32" (1/1) ... [2019-11-15 22:31:32,349 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 22:31:32,390 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 22:31:32,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:31:32,939 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 22:31:33,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 22:31:33,073 INFO L192 MainTranslator]: Completed translation [2019-11-15 22:31:33,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33 WrapperNode [2019-11-15 22:31:33,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 22:31:33,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 22:31:33,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 22:31:33,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 22:31:33,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... [2019-11-15 22:31:33,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 22:31:33,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 22:31:33,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 22:31:33,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 22:31:33,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 22:31:33,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-15 22:31:33,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 22:31:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-15 22:31:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-15 22:31:33,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-15 22:31:33,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-15 22:31:33,214 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-15 22:31:33,214 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2019-11-15 22:31:33,214 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-15 22:31:33,215 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-15 22:31:33,215 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-15 22:31:33,215 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-15 22:31:33,216 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-15 22:31:33,216 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-15 22:31:33,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-15 22:31:33,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-15 22:31:33,216 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-15 22:31:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-15 22:31:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-15 22:31:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-15 22:31:33,217 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-15 22:31:33,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-15 22:31:33,218 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-15 22:31:33,218 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-15 22:31:33,218 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-15 22:31:33,219 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-15 22:31:33,219 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-15 22:31:33,219 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-15 22:31:33,219 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-15 22:31:33,220 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-15 22:31:33,220 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-15 22:31:33,220 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-15 22:31:33,220 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-15 22:31:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-15 22:31:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-15 22:31:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-15 22:31:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-15 22:31:33,221 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-15 22:31:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-15 22:31:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-15 22:31:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-15 22:31:33,222 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-15 22:31:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-15 22:31:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-15 22:31:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-15 22:31:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-15 22:31:33,223 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-15 22:31:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-15 22:31:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-15 22:31:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-15 22:31:33,224 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-15 22:31:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-15 22:31:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-15 22:31:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-15 22:31:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-15 22:31:33,225 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-15 22:31:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-15 22:31:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-15 22:31:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-15 22:31:33,226 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-15 22:31:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-15 22:31:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-15 22:31:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-15 22:31:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-15 22:31:33,227 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-15 22:31:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-15 22:31:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-15 22:31:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-15 22:31:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-15 22:31:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-15 22:31:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-15 22:31:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-15 22:31:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-15 22:31:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-15 22:31:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-15 22:31:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-15 22:31:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-15 22:31:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-15 22:31:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-15 22:31:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-15 22:31:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-15 22:31:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-15 22:31:33,231 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-15 22:31:33,232 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-15 22:31:33,232 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-15 22:31:33,232 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-15 22:31:33,232 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-15 22:31:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-15 22:31:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-15 22:31:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-15 22:31:33,233 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-15 22:31:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-15 22:31:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-15 22:31:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-15 22:31:33,234 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-15 22:31:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-15 22:31:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-15 22:31:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-15 22:31:33,235 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-15 22:31:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-15 22:31:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-15 22:31:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-15 22:31:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-15 22:31:33,236 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-15 22:31:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-15 22:31:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-15 22:31:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-15 22:31:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-15 22:31:33,237 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-15 22:31:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-15 22:31:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-15 22:31:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-15 22:31:33,238 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-15 22:31:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-15 22:31:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-15 22:31:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-15 22:31:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-15 22:31:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-15 22:31:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2019-11-15 22:31:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 22:31:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-15 22:31:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 22:31:33,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 22:31:33,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 22:31:33,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-15 22:31:33,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 22:31:33,830 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 22:31:33,830 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 22:31:33,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:31:33 BoogieIcfgContainer [2019-11-15 22:31:33,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 22:31:33,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 22:31:33,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 22:31:33,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 22:31:33,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 10:31:32" (1/3) ... [2019-11-15 22:31:33,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:31:33, skipping insertion in model container [2019-11-15 22:31:33,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 10:31:33" (2/3) ... [2019-11-15 22:31:33,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752cba7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 10:31:33, skipping insertion in model container [2019-11-15 22:31:33,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:31:33" (3/3) ... [2019-11-15 22:31:33,839 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2019-11-15 22:31:33,850 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 22:31:33,858 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2019-11-15 22:31:33,872 INFO L249 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2019-11-15 22:31:33,894 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 22:31:33,895 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-15 22:31:33,895 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 22:31:33,895 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 22:31:33,904 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 22:31:33,904 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 22:31:33,904 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 22:31:33,904 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 22:31:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2019-11-15 22:31:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:31:33,943 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:33,943 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:33,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603009, now seen corresponding path program 1 times [2019-11-15 22:31:33,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:33,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116233409] [2019-11-15 22:31:33,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:33,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:33,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:34,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116233409] [2019-11-15 22:31:34,195 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:34,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:31:34,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910328316] [2019-11-15 22:31:34,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:31:34,200 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:31:34,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:31:34,218 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 4 states. [2019-11-15 22:31:34,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:34,464 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-15 22:31:34,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:31:34,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-15 22:31:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:34,480 INFO L225 Difference]: With dead ends: 50 [2019-11-15 22:31:34,480 INFO L226 Difference]: Without dead ends: 47 [2019-11-15 22:31:34,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:31:34,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-15 22:31:34,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-15 22:31:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-15 22:31:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-11-15 22:31:34,524 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 11 [2019-11-15 22:31:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:34,525 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-11-15 22:31:34,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:31:34,525 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-11-15 22:31:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 22:31:34,526 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:34,526 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:34,526 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603008, now seen corresponding path program 1 times [2019-11-15 22:31:34,527 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:34,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413056977] [2019-11-15 22:31:34,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:34,528 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:34,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:34,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413056977] [2019-11-15 22:31:34,655 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:34,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:31:34,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878226870] [2019-11-15 22:31:34,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:31:34,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:31:34,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:31:34,658 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 6 states. [2019-11-15 22:31:34,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:34,902 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-11-15 22:31:34,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:31:34,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-15 22:31:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:34,904 INFO L225 Difference]: With dead ends: 51 [2019-11-15 22:31:34,904 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 22:31:34,905 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:31:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 22:31:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-15 22:31:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-15 22:31:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-11-15 22:31:34,914 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2019-11-15 22:31:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:34,914 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-11-15 22:31:34,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:31:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-11-15 22:31:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 22:31:34,915 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:34,916 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:34,916 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash 973924227, now seen corresponding path program 1 times [2019-11-15 22:31:34,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:34,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174599631] [2019-11-15 22:31:34,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:34,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:34,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:35,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174599631] [2019-11-15 22:31:35,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214092407] [2019-11-15 22:31:35,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:35,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:31:35,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:35,360 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:31:35,360 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2019-11-15 22:31:35,360 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415741982] [2019-11-15 22:31:35,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:31:35,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:31:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:31:35,367 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 5 states. [2019-11-15 22:31:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:35,420 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-11-15 22:31:35,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:31:35,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-15 22:31:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:35,425 INFO L225 Difference]: With dead ends: 72 [2019-11-15 22:31:35,425 INFO L226 Difference]: Without dead ends: 72 [2019-11-15 22:31:35,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:31:35,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-15 22:31:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2019-11-15 22:31:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-15 22:31:35,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2019-11-15 22:31:35,453 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 15 [2019-11-15 22:31:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:35,455 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2019-11-15 22:31:35,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:31:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2019-11-15 22:31:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-15 22:31:35,458 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:35,458 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:35,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:35,665 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:35,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:35,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1653982597, now seen corresponding path program 1 times [2019-11-15 22:31:35,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:35,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009493605] [2019-11-15 22:31:35,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:35,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:35,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:35,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009493605] [2019-11-15 22:31:35,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076883659] [2019-11-15 22:31:35,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:36,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 22:31:36,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:36,066 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_18|], 1=[|v_#valid_27|]} [2019-11-15 22:31:36,084 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:31:36,097 INFO L375 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 [2019-11-15 22:31:36,098 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:36,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:36,131 INFO L375 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 [2019-11-15 22:31:36,131 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:36,150 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:36,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:36,152 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2019-11-15 22:31:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:36,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:31:36,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-11-15 22:31:36,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116022342] [2019-11-15 22:31:36,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:31:36,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:36,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:31:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:31:36,179 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 7 states. [2019-11-15 22:31:36,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:36,395 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2019-11-15 22:31:36,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:31:36,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-15 22:31:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:36,397 INFO L225 Difference]: With dead ends: 57 [2019-11-15 22:31:36,397 INFO L226 Difference]: Without dead ends: 57 [2019-11-15 22:31:36,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-15 22:31:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-15 22:31:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-15 22:31:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-15 22:31:36,404 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2019-11-15 22:31:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:36,404 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-15 22:31:36,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:31:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-15 22:31:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:31:36,406 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:36,406 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:36,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:36,610 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:36,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:36,610 INFO L82 PathProgramCache]: Analyzing trace with hash -361738470, now seen corresponding path program 1 times [2019-11-15 22:31:36,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:36,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644869097] [2019-11-15 22:31:36,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:36,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:36,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:31:36,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644869097] [2019-11-15 22:31:36,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277376032] [2019-11-15 22:31:36,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:36,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-15 22:31:36,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:36,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:31:36,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-11-15 22:31:36,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038357315] [2019-11-15 22:31:36,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:31:36,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:36,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:31:36,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:36,927 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 4 states. [2019-11-15 22:31:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:36,967 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2019-11-15 22:31:36,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:31:36,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-15 22:31:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:36,969 INFO L225 Difference]: With dead ends: 60 [2019-11-15 22:31:36,969 INFO L226 Difference]: Without dead ends: 60 [2019-11-15 22:31:36,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-15 22:31:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-11-15 22:31:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-15 22:31:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-11-15 22:31:36,975 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2019-11-15 22:31:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:36,975 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-11-15 22:31:36,975 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:31:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-11-15 22:31:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:31:36,976 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:36,976 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:37,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:37,177 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash -361738418, now seen corresponding path program 1 times [2019-11-15 22:31:37,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:37,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412268526] [2019-11-15 22:31:37,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,178 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:37,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412268526] [2019-11-15 22:31:37,233 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:37,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 22:31:37,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421445575] [2019-11-15 22:31:37,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 22:31:37,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 22:31:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:31:37,237 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 4 states. [2019-11-15 22:31:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:37,359 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2019-11-15 22:31:37,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:31:37,360 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-15 22:31:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:37,361 INFO L225 Difference]: With dead ends: 53 [2019-11-15 22:31:37,361 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 22:31:37,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-15 22:31:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 22:31:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-15 22:31:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-15 22:31:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-15 22:31:37,367 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2019-11-15 22:31:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:37,368 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-15 22:31:37,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 22:31:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-15 22:31:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 22:31:37,369 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:37,369 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:37,369 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:37,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash -361738417, now seen corresponding path program 1 times [2019-11-15 22:31:37,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:37,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860158566] [2019-11-15 22:31:37,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:37,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860158566] [2019-11-15 22:31:37,497 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:37,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-15 22:31:37,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913082462] [2019-11-15 22:31:37,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 22:31:37,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 22:31:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-15 22:31:37,499 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 6 states. [2019-11-15 22:31:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:37,717 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2019-11-15 22:31:37,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:31:37,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-15 22:31:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:37,719 INFO L225 Difference]: With dead ends: 56 [2019-11-15 22:31:37,719 INFO L226 Difference]: Without dead ends: 56 [2019-11-15 22:31:37,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:31:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-15 22:31:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-11-15 22:31:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-15 22:31:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-15 22:31:37,724 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 17 [2019-11-15 22:31:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:37,724 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-15 22:31:37,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 22:31:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-15 22:31:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:31:37,725 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:37,726 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:37,726 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:37,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:37,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401955, now seen corresponding path program 1 times [2019-11-15 22:31:37,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:37,727 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921815234] [2019-11-15 22:31:37,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:37,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:37,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921815234] [2019-11-15 22:31:37,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588754158] [2019-11-15 22:31:37,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:37,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 22:31:37,971 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:38,046 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:31:38,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-15 22:31:38,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815131402] [2019-11-15 22:31:38,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:31:38,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:31:38,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:38,048 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 8 states. [2019-11-15 22:31:38,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:38,315 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-15 22:31:38,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:31:38,315 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-15 22:31:38,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:38,316 INFO L225 Difference]: With dead ends: 69 [2019-11-15 22:31:38,316 INFO L226 Difference]: Without dead ends: 69 [2019-11-15 22:31:38,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:31:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-15 22:31:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2019-11-15 22:31:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-15 22:31:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-15 22:31:38,322 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 21 [2019-11-15 22:31:38,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:38,323 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-15 22:31:38,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:31:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-15 22:31:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:31:38,324 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:38,324 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:38,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:38,525 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:38,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401902, now seen corresponding path program 1 times [2019-11-15 22:31:38,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:38,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119052177] [2019-11-15 22:31:38,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:38,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:38,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:38,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119052177] [2019-11-15 22:31:38,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765465696] [2019-11-15 22:31:38,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:38,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 22:31:38,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:38,775 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:31:38,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2019-11-15 22:31:38,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3710300] [2019-11-15 22:31:38,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:31:38,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:31:38,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:31:38,776 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 5 states. [2019-11-15 22:31:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:38,815 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2019-11-15 22:31:38,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 22:31:38,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-15 22:31:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:38,817 INFO L225 Difference]: With dead ends: 95 [2019-11-15 22:31:38,817 INFO L226 Difference]: Without dead ends: 95 [2019-11-15 22:31:38,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:31:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-15 22:31:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2019-11-15 22:31:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-15 22:31:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2019-11-15 22:31:38,824 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 21 [2019-11-15 22:31:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:38,825 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2019-11-15 22:31:38,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:31:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2019-11-15 22:31:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:31:38,831 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:38,832 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:39,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:39,038 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1406448144, now seen corresponding path program 1 times [2019-11-15 22:31:39,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:39,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241505894] [2019-11-15 22:31:39,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:39,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241505894] [2019-11-15 22:31:39,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989319933] [2019-11-15 22:31:39,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:39,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-15 22:31:39,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:39,277 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:39,277 INFO L375 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 25 [2019-11-15 22:31:39,278 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:39,294 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:31:39,308 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:39,308 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:31:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:39,334 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:31:39,334 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-11-15 22:31:39,334 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528399737] [2019-11-15 22:31:39,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:31:39,335 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:31:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:31:39,336 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 7 states. [2019-11-15 22:31:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:39,455 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-11-15 22:31:39,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:31:39,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-15 22:31:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:39,457 INFO L225 Difference]: With dead ends: 89 [2019-11-15 22:31:39,457 INFO L226 Difference]: Without dead ends: 89 [2019-11-15 22:31:39,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-15 22:31:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2019-11-15 22:31:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-15 22:31:39,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-11-15 22:31:39,463 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 21 [2019-11-15 22:31:39,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:39,464 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-11-15 22:31:39,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:31:39,464 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-11-15 22:31:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-15 22:31:39,465 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:39,465 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:39,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:39,670 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1137701663, now seen corresponding path program 1 times [2019-11-15 22:31:39,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:39,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720655591] [2019-11-15 22:31:39,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:39,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720655591] [2019-11-15 22:31:39,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:39,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:31:39,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092621853] [2019-11-15 22:31:39,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:31:39,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:31:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:39,778 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 8 states. [2019-11-15 22:31:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:39,920 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2019-11-15 22:31:39,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:31:39,921 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-15 22:31:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:39,922 INFO L225 Difference]: With dead ends: 82 [2019-11-15 22:31:39,922 INFO L226 Difference]: Without dead ends: 82 [2019-11-15 22:31:39,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:31:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-15 22:31:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 69. [2019-11-15 22:31:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-15 22:31:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-11-15 22:31:39,928 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 21 [2019-11-15 22:31:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:39,928 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-11-15 22:31:39,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:31:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-11-15 22:31:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:31:39,929 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:39,929 INFO L380 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] [2019-11-15 22:31:39,930 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1930081580, now seen corresponding path program 1 times [2019-11-15 22:31:39,934 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:39,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202546216] [2019-11-15 22:31:39,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:39,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:40,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202546216] [2019-11-15 22:31:40,047 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551623545] [2019-11-15 22:31:40,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:40,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 22:31:40,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:40,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:40,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:31:40,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-15 22:31:40,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528695001] [2019-11-15 22:31:40,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-15 22:31:40,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-15 22:31:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-15 22:31:40,237 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 9 states. [2019-11-15 22:31:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:40,480 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-15 22:31:40,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-15 22:31:40,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-15 22:31:40,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:40,482 INFO L225 Difference]: With dead ends: 75 [2019-11-15 22:31:40,482 INFO L226 Difference]: Without dead ends: 75 [2019-11-15 22:31:40,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:31:40,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-15 22:31:40,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2019-11-15 22:31:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-15 22:31:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-11-15 22:31:40,486 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 22 [2019-11-15 22:31:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:40,486 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-11-15 22:31:40,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-15 22:31:40,486 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-11-15 22:31:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 22:31:40,487 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:40,487 INFO L380 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] [2019-11-15 22:31:40,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:40,688 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:40,688 INFO L82 PathProgramCache]: Analyzing trace with hash 650217902, now seen corresponding path program 1 times [2019-11-15 22:31:40,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:40,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570758902] [2019-11-15 22:31:40,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:40,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:40,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:40,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570758902] [2019-11-15 22:31:40,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:40,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:31:40,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113151412] [2019-11-15 22:31:40,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:31:40,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:40,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:31:40,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:40,787 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 8 states. [2019-11-15 22:31:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:40,939 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2019-11-15 22:31:40,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:31:40,940 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-15 22:31:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:40,941 INFO L225 Difference]: With dead ends: 70 [2019-11-15 22:31:40,941 INFO L226 Difference]: Without dead ends: 70 [2019-11-15 22:31:40,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:31:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-15 22:31:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-11-15 22:31:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 22:31:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-11-15 22:31:40,945 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 22 [2019-11-15 22:31:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:40,945 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-11-15 22:31:40,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:31:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-11-15 22:31:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 22:31:40,946 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:40,946 INFO L380 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] [2019-11-15 22:31:40,947 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:40,947 INFO L82 PathProgramCache]: Analyzing trace with hash -684951934, now seen corresponding path program 1 times [2019-11-15 22:31:40,947 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:40,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691760810] [2019-11-15 22:31:40,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:40,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:40,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:41,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691760810] [2019-11-15 22:31:41,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:41,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:31:41,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109817907] [2019-11-15 22:31:41,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:31:41,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:41,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:31:41,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:41,043 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 8 states. [2019-11-15 22:31:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:41,271 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2019-11-15 22:31:41,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 22:31:41,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-15 22:31:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:41,273 INFO L225 Difference]: With dead ends: 75 [2019-11-15 22:31:41,273 INFO L226 Difference]: Without dead ends: 75 [2019-11-15 22:31:41,274 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-15 22:31:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-15 22:31:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-11-15 22:31:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-15 22:31:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-11-15 22:31:41,278 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2019-11-15 22:31:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:41,278 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-11-15 22:31:41,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:31:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-11-15 22:31:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-15 22:31:41,280 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:41,280 INFO L380 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] [2019-11-15 22:31:41,280 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -684951935, now seen corresponding path program 1 times [2019-11-15 22:31:41,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:41,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184958698] [2019-11-15 22:31:41,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:41,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184958698] [2019-11-15 22:31:41,362 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:41,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-15 22:31:41,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923256738] [2019-11-15 22:31:41,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 22:31:41,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:41,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 22:31:41,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 22:31:41,364 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 7 states. [2019-11-15 22:31:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:41,555 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-15 22:31:41,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 22:31:41,556 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-15 22:31:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:41,556 INFO L225 Difference]: With dead ends: 69 [2019-11-15 22:31:41,557 INFO L226 Difference]: Without dead ends: 69 [2019-11-15 22:31:41,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:31:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-15 22:31:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-15 22:31:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-15 22:31:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-11-15 22:31:41,561 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2019-11-15 22:31:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:41,561 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-11-15 22:31:41,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 22:31:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-11-15 22:31:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 22:31:41,562 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:41,563 INFO L380 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] [2019-11-15 22:31:41,563 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:41,563 INFO L82 PathProgramCache]: Analyzing trace with hash -418036057, now seen corresponding path program 1 times [2019-11-15 22:31:41,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:41,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466515974] [2019-11-15 22:31:41,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:41,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466515974] [2019-11-15 22:31:41,655 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:41,656 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 22:31:41,656 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164180237] [2019-11-15 22:31:41,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-15 22:31:41,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-15 22:31:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-15 22:31:41,657 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 8 states. [2019-11-15 22:31:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:41,923 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2019-11-15 22:31:41,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 22:31:41,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-15 22:31:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:41,927 INFO L225 Difference]: With dead ends: 73 [2019-11-15 22:31:41,927 INFO L226 Difference]: Without dead ends: 73 [2019-11-15 22:31:41,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-15 22:31:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-15 22:31:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-11-15 22:31:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-15 22:31:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-11-15 22:31:41,933 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2019-11-15 22:31:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:41,934 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-11-15 22:31:41,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-15 22:31:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-11-15 22:31:41,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-15 22:31:41,936 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:41,936 INFO L380 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] [2019-11-15 22:31:41,937 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -418036056, now seen corresponding path program 1 times [2019-11-15 22:31:41,937 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:41,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867900152] [2019-11-15 22:31:41,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:41,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:31:42,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867900152] [2019-11-15 22:31:42,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:42,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-15 22:31:42,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649414083] [2019-11-15 22:31:42,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:31:42,128 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:31:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-15 22:31:42,129 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 10 states. [2019-11-15 22:31:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:42,467 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-11-15 22:31:42,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-15 22:31:42,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-15 22:31:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:42,468 INFO L225 Difference]: With dead ends: 72 [2019-11-15 22:31:42,468 INFO L226 Difference]: Without dead ends: 72 [2019-11-15 22:31:42,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-15 22:31:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-15 22:31:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-15 22:31:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-15 22:31:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-11-15 22:31:42,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2019-11-15 22:31:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:42,472 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-11-15 22:31:42,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:31:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-11-15 22:31:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-15 22:31:42,473 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:42,473 INFO L380 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] [2019-11-15 22:31:42,474 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1655830610, now seen corresponding path program 1 times [2019-11-15 22:31:42,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:42,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534472100] [2019-11-15 22:31:42,474 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:42,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:42,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:31:42,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534472100] [2019-11-15 22:31:42,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 22:31:42,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 22:31:42,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474471049] [2019-11-15 22:31:42,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-15 22:31:42,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:42,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-15 22:31:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:31:42,570 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 5 states. [2019-11-15 22:31:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:42,678 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-15 22:31:42,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 22:31:42,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-15 22:31:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:42,679 INFO L225 Difference]: With dead ends: 69 [2019-11-15 22:31:42,679 INFO L226 Difference]: Without dead ends: 64 [2019-11-15 22:31:42,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-15 22:31:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-15 22:31:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-15 22:31:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-15 22:31:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2019-11-15 22:31:42,683 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2019-11-15 22:31:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:42,683 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2019-11-15 22:31:42,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-15 22:31:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2019-11-15 22:31:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-15 22:31:42,684 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:42,684 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:42,684 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:42,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:42,685 INFO L82 PathProgramCache]: Analyzing trace with hash 942908492, now seen corresponding path program 1 times [2019-11-15 22:31:42,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:42,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963702916] [2019-11-15 22:31:42,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:42,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:42,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:43,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963702916] [2019-11-15 22:31:43,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341274945] [2019-11-15 22:31:43,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:43,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-15 22:31:43,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:43,178 INFO L375 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 [2019-11-15 22:31:43,178 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:43,184 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,184 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:31:43,199 INFO L375 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 11 treesize of output 7 [2019-11-15 22:31:43,199 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,205 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:43,205 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,205 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-15 22:31:43,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:31:43,222 INFO L375 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 22 treesize of output 21 [2019-11-15 22:31:43,223 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:43,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-15 22:31:43,231 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:22 [2019-11-15 22:31:43,378 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 10 [2019-11-15 22:31:43,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,385 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:43,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:43,386 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:29, output treesize:3 [2019-11-15 22:31:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 22:31:43,391 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:31:43,391 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 18 [2019-11-15 22:31:43,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622483941] [2019-11-15 22:31:43,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 22:31:43,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 22:31:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2019-11-15 22:31:43,392 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 11 states. [2019-11-15 22:31:47,603 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-15 22:31:50,835 WARN L191 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 29 [2019-11-15 22:31:53,775 WARN L191 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-15 22:31:56,916 WARN L191 SmtUtils]: Spent 3.12 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-15 22:31:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:56,927 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2019-11-15 22:31:56,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-15 22:31:56,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-11-15 22:31:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:56,929 INFO L225 Difference]: With dead ends: 84 [2019-11-15 22:31:56,929 INFO L226 Difference]: Without dead ends: 51 [2019-11-15 22:31:56,929 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-11-15 22:31:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-15 22:31:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-15 22:31:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-15 22:31:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-11-15 22:31:56,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2019-11-15 22:31:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:56,932 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-11-15 22:31:56,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 22:31:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-11-15 22:31:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-15 22:31:56,933 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:56,933 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:57,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:57,138 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:57,138 INFO L82 PathProgramCache]: Analyzing trace with hash 433435402, now seen corresponding path program 1 times [2019-11-15 22:31:57,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:57,139 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485194596] [2019-11-15 22:31:57,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:57,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:57,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:57,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485194596] [2019-11-15 22:31:57,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704424230] [2019-11-15 22:31:57,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:57,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-15 22:31:57,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:31:57,608 INFO L375 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 [2019-11-15 22:31:57,608 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:57,614 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:57,614 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:57,615 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 22:31:57,694 INFO L375 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 14 treesize of output 10 [2019-11-15 22:31:57,694 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:57,702 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:57,703 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:31:57,703 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:31:57,737 INFO L375 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 25 treesize of output 24 [2019-11-15 22:31:57,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:31:57,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:57,770 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:31:57,770 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:31:58,004 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:31:58,005 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:31:58,006 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:31:58,032 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:31:58,033 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:31:58,033 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:31:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:58,040 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:31:58,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2019-11-15 22:31:58,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029627736] [2019-11-15 22:31:58,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 22:31:58,045 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:31:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 22:31:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2019-11-15 22:31:58,046 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 21 states. [2019-11-15 22:31:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:31:59,498 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2019-11-15 22:31:59,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:31:59,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2019-11-15 22:31:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:31:59,500 INFO L225 Difference]: With dead ends: 85 [2019-11-15 22:31:59,500 INFO L226 Difference]: Without dead ends: 65 [2019-11-15 22:31:59,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2019-11-15 22:31:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-15 22:31:59,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2019-11-15 22:31:59,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 22:31:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-11-15 22:31:59,504 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2019-11-15 22:31:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:31:59,508 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-11-15 22:31:59,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 22:31:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-11-15 22:31:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-15 22:31:59,509 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:31:59,509 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:31:59,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:31:59,710 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:31:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:31:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1542789593, now seen corresponding path program 2 times [2019-11-15 22:31:59,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:31:59,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721786975] [2019-11-15 22:31:59,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:59,711 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:31:59,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:31:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:31:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:31:59,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721786975] [2019-11-15 22:31:59,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584526196] [2019-11-15 22:31:59,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:00,108 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:32:00,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:00,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-15 22:32:00,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:00,274 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:00,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2019-11-15 22:32:00,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947399249] [2019-11-15 22:32:00,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 22:32:00,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 22:32:00,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:32:00,277 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 19 states. [2019-11-15 22:32:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:00,765 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-11-15 22:32:00,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 22:32:00,766 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2019-11-15 22:32:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:00,767 INFO L225 Difference]: With dead ends: 75 [2019-11-15 22:32:00,767 INFO L226 Difference]: Without dead ends: 75 [2019-11-15 22:32:00,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2019-11-15 22:32:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-15 22:32:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-11-15 22:32:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-15 22:32:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2019-11-15 22:32:00,770 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 38 [2019-11-15 22:32:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:00,771 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2019-11-15 22:32:00,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 22:32:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2019-11-15 22:32:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 22:32:00,772 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:00,772 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:00,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:00,973 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -581752220, now seen corresponding path program 1 times [2019-11-15 22:32:00,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:00,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790094311] [2019-11-15 22:32:00,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:00,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:00,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:01,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790094311] [2019-11-15 22:32:01,272 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967268842] [2019-11-15 22:32:01,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:01,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-15 22:32:01,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:01,464 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-15 22:32:01,465 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:01,467 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:01,467 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:01,468 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-15 22:32:01,507 INFO L375 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 [2019-11-15 22:32:01,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:01,511 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:01,511 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:01,512 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:32:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-15 22:32:01,515 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-15 22:32:01,515 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 17 [2019-11-15 22:32:01,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307542860] [2019-11-15 22:32:01,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 22:32:01,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 22:32:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-15 22:32:01,517 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 10 states. [2019-11-15 22:32:01,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:01,877 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2019-11-15 22:32:01,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 22:32:01,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-15 22:32:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:01,880 INFO L225 Difference]: With dead ends: 94 [2019-11-15 22:32:01,880 INFO L226 Difference]: Without dead ends: 94 [2019-11-15 22:32:01,881 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2019-11-15 22:32:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-15 22:32:01,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-15 22:32:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-15 22:32:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2019-11-15 22:32:01,885 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 39 [2019-11-15 22:32:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:01,885 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2019-11-15 22:32:01,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 22:32:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2019-11-15 22:32:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-15 22:32:01,886 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:01,886 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:02,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:02,087 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash -306992606, now seen corresponding path program 1 times [2019-11-15 22:32:02,087 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:02,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693272601] [2019-11-15 22:32:02,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:02,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:02,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:02,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693272601] [2019-11-15 22:32:02,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898395363] [2019-11-15 22:32:02,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:02,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-15 22:32:02,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:02,698 INFO L375 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 14 treesize of output 10 [2019-11-15 22:32:02,699 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:02,711 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:02,712 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:02,712 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:32:02,766 INFO L375 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 [2019-11-15 22:32:02,767 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:02,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:02,769 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:02,769 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:32:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:02,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:02,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 19 [2019-11-15 22:32:02,773 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115899996] [2019-11-15 22:32:02,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 22:32:02,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 22:32:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-15 22:32:02,775 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 19 states. [2019-11-15 22:32:03,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:03,507 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-11-15 22:32:03,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-15 22:32:03,507 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-15 22:32:03,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:03,508 INFO L225 Difference]: With dead ends: 123 [2019-11-15 22:32:03,508 INFO L226 Difference]: Without dead ends: 123 [2019-11-15 22:32:03,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 22:32:03,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-15 22:32:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2019-11-15 22:32:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-15 22:32:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2019-11-15 22:32:03,514 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 39 [2019-11-15 22:32:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:03,514 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2019-11-15 22:32:03,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 22:32:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2019-11-15 22:32:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-15 22:32:03,515 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:03,515 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:03,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:03,716 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:03,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:03,716 INFO L82 PathProgramCache]: Analyzing trace with hash 149054821, now seen corresponding path program 2 times [2019-11-15 22:32:03,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:03,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396116541] [2019-11-15 22:32:03,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:03,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:03,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:03,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396116541] [2019-11-15 22:32:03,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681489341] [2019-11-15 22:32:03,926 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:04,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:32:04,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:04,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-15 22:32:04,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:04,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:04,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2019-11-15 22:32:04,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395441726] [2019-11-15 22:32:04,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-15 22:32:04,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:04,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-15 22:32:04,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2019-11-15 22:32:04,244 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 22 states. [2019-11-15 22:32:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:05,072 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2019-11-15 22:32:05,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 22:32:05,073 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2019-11-15 22:32:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:05,074 INFO L225 Difference]: With dead ends: 118 [2019-11-15 22:32:05,074 INFO L226 Difference]: Without dead ends: 118 [2019-11-15 22:32:05,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2019-11-15 22:32:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-15 22:32:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2019-11-15 22:32:05,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-15 22:32:05,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-11-15 22:32:05,079 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 43 [2019-11-15 22:32:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:05,079 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-11-15 22:32:05,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-15 22:32:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-11-15 22:32:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-15 22:32:05,080 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:05,080 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:05,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:05,281 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:05,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2091999503, now seen corresponding path program 3 times [2019-11-15 22:32:05,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:05,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411281269] [2019-11-15 22:32:05,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:05,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:05,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:05,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411281269] [2019-11-15 22:32:05,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327576741] [2019-11-15 22:32:05,757 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:05,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 22:32:05,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:05,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-15 22:32:05,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:05,945 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:05,946 INFO L375 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 25 [2019-11-15 22:32:05,946 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:05,969 INFO L567 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2019-11-15 22:32:05,969 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:05,969 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2019-11-15 22:32:06,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:06,185 INFO L375 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 38 treesize of output 34 [2019-11-15 22:32:06,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,191 INFO L375 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 35 treesize of output 31 [2019-11-15 22:32:06,192 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,220 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:06,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-15 22:32:06,221 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:66 [2019-11-15 22:32:06,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:06,322 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:32:06,325 INFO L375 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 43 treesize of output 42 [2019-11-15 22:32:06,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,353 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:06,372 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:06,372 INFO L375 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 69 [2019-11-15 22:32:06,373 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,421 INFO L567 ElimStorePlain]: treesize reduction 33, result has 68.9 percent of original size [2019-11-15 22:32:06,422 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-15 22:32:06,422 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:81, output treesize:73 [2019-11-15 22:32:06,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:06,863 INFO L375 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 50 treesize of output 44 [2019-11-15 22:32:06,864 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:06,874 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:06,875 INFO L375 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 56 treesize of output 52 [2019-11-15 22:32:06,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:06,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:06,878 INFO L496 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:06,950 INFO L567 ElimStorePlain]: treesize reduction 14, result has 85.6 percent of original size [2019-11-15 22:32:06,956 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:32:06,957 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:32:06,958 INFO L375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2019-11-15 22:32:06,959 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,963 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:32:06,964 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 31 [2019-11-15 22:32:06,964 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,991 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:06,992 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:06,992 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:107, output treesize:3 [2019-11-15 22:32:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:07,011 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:07,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2019-11-15 22:32:07,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817755476] [2019-11-15 22:32:07,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-15 22:32:07,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-15 22:32:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2019-11-15 22:32:07,012 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 28 states. [2019-11-15 22:32:08,143 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-11-15 22:32:08,457 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2019-11-15 22:32:08,685 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2019-11-15 22:32:08,938 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2019-11-15 22:32:09,224 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2019-11-15 22:32:09,416 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2019-11-15 22:32:09,616 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2019-11-15 22:32:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:09,724 INFO L93 Difference]: Finished difference Result 196 states and 210 transitions. [2019-11-15 22:32:09,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-15 22:32:09,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 46 [2019-11-15 22:32:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:09,726 INFO L225 Difference]: With dead ends: 196 [2019-11-15 22:32:09,726 INFO L226 Difference]: Without dead ends: 154 [2019-11-15 22:32:09,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2019-11-15 22:32:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-15 22:32:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2019-11-15 22:32:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-15 22:32:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2019-11-15 22:32:09,732 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 46 [2019-11-15 22:32:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:09,732 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2019-11-15 22:32:09,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-15 22:32:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2019-11-15 22:32:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-15 22:32:09,733 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:09,733 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:09,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:09,934 INFO L410 AbstractCegarLoop]: === Iteration 26 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash 947634242, now seen corresponding path program 3 times [2019-11-15 22:32:09,935 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:09,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413774489] [2019-11-15 22:32:09,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:09,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:09,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:09,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:10,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413774489] [2019-11-15 22:32:10,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243760290] [2019-11-15 22:32:10,409 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:10,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-15 22:32:10,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:10,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-15 22:32:10,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:10,616 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:10,617 INFO L375 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 25 [2019-11-15 22:32:10,617 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:10,645 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:32:10,645 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:10,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:32:10,842 INFO L375 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 [2019-11-15 22:32:10,842 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:10,850 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:10,850 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:10,851 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-15 22:32:11,216 INFO L375 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 25 treesize of output 19 [2019-11-15 22:32:11,217 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:11,237 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:11,243 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:32:11,245 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:11,246 INFO L375 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 18 treesize of output 10 [2019-11-15 22:32:11,246 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:11,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:11,259 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:11,259 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2019-11-15 22:32:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:11,271 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:11,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2019-11-15 22:32:11,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830565753] [2019-11-15 22:32:11,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-15 22:32:11,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-15 22:32:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2019-11-15 22:32:11,273 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 29 states. [2019-11-15 22:32:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:13,978 INFO L93 Difference]: Finished difference Result 216 states and 232 transitions. [2019-11-15 22:32:13,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-15 22:32:13,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2019-11-15 22:32:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:13,980 INFO L225 Difference]: With dead ends: 216 [2019-11-15 22:32:13,980 INFO L226 Difference]: Without dead ends: 199 [2019-11-15 22:32:13,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=447, Invalid=2975, Unknown=0, NotChecked=0, Total=3422 [2019-11-15 22:32:13,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-15 22:32:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2019-11-15 22:32:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-15 22:32:13,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 202 transitions. [2019-11-15 22:32:13,987 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 202 transitions. Word has length 48 [2019-11-15 22:32:13,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:13,988 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 202 transitions. [2019-11-15 22:32:13,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-15 22:32:13,988 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 202 transitions. [2019-11-15 22:32:13,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-15 22:32:13,989 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:13,989 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:14,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:14,193 INFO L410 AbstractCegarLoop]: === Iteration 27 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2061037938, now seen corresponding path program 4 times [2019-11-15 22:32:14,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:14,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805911383] [2019-11-15 22:32:14,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:14,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:14,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:14,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805911383] [2019-11-15 22:32:14,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525308458] [2019-11-15 22:32:14,477 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:14,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:32:14,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:14,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-15 22:32:14,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:14,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:14,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2019-11-15 22:32:14,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389358013] [2019-11-15 22:32:14,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-15 22:32:14,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:14,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-15 22:32:14,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2019-11-15 22:32:14,776 INFO L87 Difference]: Start difference. First operand 184 states and 202 transitions. Second operand 21 states. [2019-11-15 22:32:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:15,393 INFO L93 Difference]: Finished difference Result 232 states and 251 transitions. [2019-11-15 22:32:15,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-15 22:32:15,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2019-11-15 22:32:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:15,395 INFO L225 Difference]: With dead ends: 232 [2019-11-15 22:32:15,395 INFO L226 Difference]: Without dead ends: 232 [2019-11-15 22:32:15,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2019-11-15 22:32:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-11-15 22:32:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 221. [2019-11-15 22:32:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-15 22:32:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2019-11-15 22:32:15,401 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 50 [2019-11-15 22:32:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:15,402 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2019-11-15 22:32:15,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-15 22:32:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2019-11-15 22:32:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-15 22:32:15,403 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:15,403 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:15,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:15,608 INFO L410 AbstractCegarLoop]: === Iteration 28 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:15,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1709703263, now seen corresponding path program 4 times [2019-11-15 22:32:15,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:15,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187113149] [2019-11-15 22:32:15,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:15,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:15,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:15,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187113149] [2019-11-15 22:32:15,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511301776] [2019-11-15 22:32:15,863 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:16,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:32:16,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:16,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-15 22:32:16,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:16,222 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:16,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2019-11-15 22:32:16,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467943053] [2019-11-15 22:32:16,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-15 22:32:16,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:16,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-15 22:32:16,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2019-11-15 22:32:16,223 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand 24 states. [2019-11-15 22:32:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:17,066 INFO L93 Difference]: Finished difference Result 272 states and 299 transitions. [2019-11-15 22:32:17,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:32:17,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2019-11-15 22:32:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:17,069 INFO L225 Difference]: With dead ends: 272 [2019-11-15 22:32:17,069 INFO L226 Difference]: Without dead ends: 272 [2019-11-15 22:32:17,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2019-11-15 22:32:17,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-11-15 22:32:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2019-11-15 22:32:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-15 22:32:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2019-11-15 22:32:17,079 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 52 [2019-11-15 22:32:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:17,079 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2019-11-15 22:32:17,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-15 22:32:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2019-11-15 22:32:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-15 22:32:17,080 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:17,080 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:17,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:17,285 INFO L410 AbstractCegarLoop]: === Iteration 29 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1417547384, now seen corresponding path program 5 times [2019-11-15 22:32:17,286 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:17,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196468820] [2019-11-15 22:32:17,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:17,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:17,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:17,511 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-11-15 22:32:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 22:32:18,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196468820] [2019-11-15 22:32:18,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822620801] [2019-11-15 22:32:18,728 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:18,919 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-15 22:32:18,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:18,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-15 22:32:18,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:19,167 INFO L375 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 14 treesize of output 10 [2019-11-15 22:32:19,168 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:19,176 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:19,176 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:19,177 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:32:19,480 INFO L375 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 [2019-11-15 22:32:19,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:19,484 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:19,485 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:19,485 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:32:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:19,493 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:19,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 35 [2019-11-15 22:32:19,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807876461] [2019-11-15 22:32:19,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-15 22:32:19,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-15 22:32:19,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2019-11-15 22:32:19,496 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand 35 states. [2019-11-15 22:32:20,096 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-11-15 22:32:20,321 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-11-15 22:32:20,550 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2019-11-15 22:32:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:23,280 INFO L93 Difference]: Finished difference Result 366 states and 398 transitions. [2019-11-15 22:32:23,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-15 22:32:23,280 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 57 [2019-11-15 22:32:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:23,282 INFO L225 Difference]: With dead ends: 366 [2019-11-15 22:32:23,282 INFO L226 Difference]: Without dead ends: 344 [2019-11-15 22:32:23,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=419, Invalid=4137, Unknown=0, NotChecked=0, Total=4556 [2019-11-15 22:32:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-11-15 22:32:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 309. [2019-11-15 22:32:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2019-11-15 22:32:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 342 transitions. [2019-11-15 22:32:23,295 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 342 transitions. Word has length 57 [2019-11-15 22:32:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:23,295 INFO L462 AbstractCegarLoop]: Abstraction has 309 states and 342 transitions. [2019-11-15 22:32:23,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-15 22:32:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 342 transitions. [2019-11-15 22:32:23,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-15 22:32:23,297 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:23,297 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:32:23,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:23,502 INFO L410 AbstractCegarLoop]: === Iteration 30 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:23,502 INFO L82 PathProgramCache]: Analyzing trace with hash -515149736, now seen corresponding path program 5 times [2019-11-15 22:32:23,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:23,503 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922972974] [2019-11-15 22:32:23,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:23,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:23,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:24,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922972974] [2019-11-15 22:32:24,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647931080] [2019-11-15 22:32:24,126 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:24,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-15 22:32:24,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:24,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-15 22:32:24,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:24,357 INFO L375 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 [2019-11-15 22:32:24,357 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:24,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:24,363 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:24,363 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:32:24,535 INFO L375 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 14 treesize of output 10 [2019-11-15 22:32:24,536 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:24,542 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:24,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:24,543 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:32:24,580 INFO L375 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 25 treesize of output 24 [2019-11-15 22:32:24,580 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:24,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:24,593 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:24,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:32:24,982 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:24,982 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:32:24,983 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:32:24,997 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:32:24,998 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:24,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:32:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:32:25,022 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:25,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 31 [2019-11-15 22:32:25,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011770116] [2019-11-15 22:32:25,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-15 22:32:25,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:25,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-15 22:32:25,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2019-11-15 22:32:25,025 INFO L87 Difference]: Start difference. First operand 309 states and 342 transitions. Second operand 31 states. [2019-11-15 22:32:30,248 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-11-15 22:32:34,411 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:32:38,657 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:32:42,994 WARN L191 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:32:47,159 WARN L191 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-15 22:32:51,270 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-15 22:32:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:32:51,388 INFO L93 Difference]: Finished difference Result 501 states and 548 transitions. [2019-11-15 22:32:51,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 22:32:51,389 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2019-11-15 22:32:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:32:51,391 INFO L225 Difference]: With dead ends: 501 [2019-11-15 22:32:51,392 INFO L226 Difference]: Without dead ends: 389 [2019-11-15 22:32:51,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2019-11-15 22:32:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2019-11-15 22:32:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 360. [2019-11-15 22:32:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2019-11-15 22:32:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 399 transitions. [2019-11-15 22:32:51,406 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 399 transitions. Word has length 58 [2019-11-15 22:32:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:32:51,406 INFO L462 AbstractCegarLoop]: Abstraction has 360 states and 399 transitions. [2019-11-15 22:32:51,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-15 22:32:51,407 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 399 transitions. [2019-11-15 22:32:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-15 22:32:51,408 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:32:51,408 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-15 22:32:51,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:51,613 INFO L410 AbstractCegarLoop]: === Iteration 31 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:32:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:32:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash -533757429, now seen corresponding path program 6 times [2019-11-15 22:32:51,614 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:32:51,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368117584] [2019-11-15 22:32:51,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:51,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:32:51,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:32:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:32:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:32:51,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368117584] [2019-11-15 22:32:51,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424278962] [2019-11-15 22:32:51,969 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:32:52,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-15 22:32:52,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:32:52,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-15 22:32:52,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:32:52,314 INFO L375 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 14 treesize of output 10 [2019-11-15 22:32:52,314 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:32:52,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:52,322 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:32:52,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:32:52,702 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:52,702 INFO L375 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 20 [2019-11-15 22:32:52,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:32:52,726 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:32:52,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:52,728 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:32:52,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:27 [2019-11-15 22:32:52,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:32:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-15 22:32:52,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:32:52,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2019-11-15 22:32:52,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393786587] [2019-11-15 22:32:52,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-15 22:32:52,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:32:52,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-15 22:32:52,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2019-11-15 22:32:52,894 INFO L87 Difference]: Start difference. First operand 360 states and 399 transitions. Second operand 32 states. [2019-11-15 22:33:00,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:00,462 INFO L93 Difference]: Finished difference Result 464 states and 509 transitions. [2019-11-15 22:33:00,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-15 22:33:00,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2019-11-15 22:33:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:00,465 INFO L225 Difference]: With dead ends: 464 [2019-11-15 22:33:00,465 INFO L226 Difference]: Without dead ends: 464 [2019-11-15 22:33:00,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=369, Invalid=2599, Unknown=2, NotChecked=0, Total=2970 [2019-11-15 22:33:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-15 22:33:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 385. [2019-11-15 22:33:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2019-11-15 22:33:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 428 transitions. [2019-11-15 22:33:00,479 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 428 transitions. Word has length 61 [2019-11-15 22:33:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:00,480 INFO L462 AbstractCegarLoop]: Abstraction has 385 states and 428 transitions. [2019-11-15 22:33:00,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-15 22:33:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 428 transitions. [2019-11-15 22:33:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-15 22:33:00,481 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:00,482 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:00,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:00,686 INFO L410 AbstractCegarLoop]: === Iteration 32 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -179282827, now seen corresponding path program 6 times [2019-11-15 22:33:00,686 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:00,686 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134983849] [2019-11-15 22:33:00,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:00,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:00,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:01,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134983849] [2019-11-15 22:33:01,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268565498] [2019-11-15 22:33:01,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:01,254 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-15 22:33:01,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:01,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-15 22:33:01,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:01,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:01,437 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2019-11-15 22:33:01,437 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662313435] [2019-11-15 22:33:01,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-15 22:33:01,438 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:01,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-15 22:33:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-15 22:33:01,439 INFO L87 Difference]: Start difference. First operand 385 states and 428 transitions. Second operand 23 states. [2019-11-15 22:33:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:02,398 INFO L93 Difference]: Finished difference Result 464 states and 511 transitions. [2019-11-15 22:33:02,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-15 22:33:02,399 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2019-11-15 22:33:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:02,402 INFO L225 Difference]: With dead ends: 464 [2019-11-15 22:33:02,402 INFO L226 Difference]: Without dead ends: 464 [2019-11-15 22:33:02,404 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2019-11-15 22:33:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-15 22:33:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 450. [2019-11-15 22:33:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2019-11-15 22:33:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 501 transitions. [2019-11-15 22:33:02,419 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 501 transitions. Word has length 62 [2019-11-15 22:33:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:02,420 INFO L462 AbstractCegarLoop]: Abstraction has 450 states and 501 transitions. [2019-11-15 22:33:02,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-15 22:33:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 501 transitions. [2019-11-15 22:33:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-15 22:33:02,421 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:02,422 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:02,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:02,639 INFO L410 AbstractCegarLoop]: === Iteration 33 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:02,639 INFO L82 PathProgramCache]: Analyzing trace with hash -867919012, now seen corresponding path program 7 times [2019-11-15 22:33:02,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:02,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743597605] [2019-11-15 22:33:02,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:02,640 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:02,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:03,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743597605] [2019-11-15 22:33:03,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465914680] [2019-11-15 22:33:03,100 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:03,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 57 conjunts are in the unsatisfiable core [2019-11-15 22:33:03,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:03,530 INFO L375 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 14 treesize of output 10 [2019-11-15 22:33:03,530 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:03,538 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:03,539 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:33:03,539 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:33:03,725 INFO L375 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 [2019-11-15 22:33:03,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:03,726 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:03,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:03,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:33:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:03,735 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:03,735 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 33 [2019-11-15 22:33:03,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504411718] [2019-11-15 22:33:03,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 22:33:03,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 22:33:03,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:33:03,737 INFO L87 Difference]: Start difference. First operand 450 states and 501 transitions. Second operand 33 states. [2019-11-15 22:33:06,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:06,041 INFO L93 Difference]: Finished difference Result 695 states and 763 transitions. [2019-11-15 22:33:06,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-15 22:33:06,042 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2019-11-15 22:33:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:06,045 INFO L225 Difference]: With dead ends: 695 [2019-11-15 22:33:06,045 INFO L226 Difference]: Without dead ends: 622 [2019-11-15 22:33:06,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=325, Invalid=2755, Unknown=0, NotChecked=0, Total=3080 [2019-11-15 22:33:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-15 22:33:06,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 560. [2019-11-15 22:33:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-15 22:33:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 625 transitions. [2019-11-15 22:33:06,062 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 625 transitions. Word has length 66 [2019-11-15 22:33:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:06,062 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 625 transitions. [2019-11-15 22:33:06,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 22:33:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 625 transitions. [2019-11-15 22:33:06,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-15 22:33:06,064 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:06,065 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:06,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:06,269 INFO L410 AbstractCegarLoop]: === Iteration 34 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2006443839, now seen corresponding path program 7 times [2019-11-15 22:33:06,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:06,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121877551] [2019-11-15 22:33:06,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:06,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:06,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:06,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121877551] [2019-11-15 22:33:06,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255975379] [2019-11-15 22:33:06,764 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:06,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 60 conjunts are in the unsatisfiable core [2019-11-15 22:33:06,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:06,943 INFO L375 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 [2019-11-15 22:33:06,943 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:06,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:06,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:06,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 22:33:07,205 INFO L375 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 14 treesize of output 10 [2019-11-15 22:33:07,206 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:07,217 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:07,217 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:33:07,218 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:33:07,297 INFO L375 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 25 treesize of output 24 [2019-11-15 22:33:07,298 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:07,310 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:07,311 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:33:07,311 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2019-11-15 22:33:07,962 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:33:07,964 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 10 [2019-11-15 22:33:07,964 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:07,983 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:07,984 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:07,984 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:49, output treesize:3 [2019-11-15 22:33:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:08,028 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:08,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2019-11-15 22:33:08,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158768973] [2019-11-15 22:33:08,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-15 22:33:08,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:08,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-15 22:33:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 22:33:08,031 INFO L87 Difference]: Start difference. First operand 560 states and 625 transitions. Second operand 36 states. [2019-11-15 22:33:13,481 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-11-15 22:33:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:16,953 INFO L93 Difference]: Finished difference Result 909 states and 1006 transitions. [2019-11-15 22:33:16,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-15 22:33:16,954 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2019-11-15 22:33:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:16,958 INFO L225 Difference]: With dead ends: 909 [2019-11-15 22:33:16,958 INFO L226 Difference]: Without dead ends: 681 [2019-11-15 22:33:16,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=224, Invalid=2638, Unknown=0, NotChecked=0, Total=2862 [2019-11-15 22:33:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2019-11-15 22:33:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 620. [2019-11-15 22:33:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-15 22:33:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 692 transitions. [2019-11-15 22:33:16,981 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 692 transitions. Word has length 70 [2019-11-15 22:33:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:16,982 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 692 transitions. [2019-11-15 22:33:16,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-15 22:33:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 692 transitions. [2019-11-15 22:33:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-15 22:33:16,984 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:16,984 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:17,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:17,190 INFO L410 AbstractCegarLoop]: === Iteration 35 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:17,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:17,190 INFO L82 PathProgramCache]: Analyzing trace with hash -613552583, now seen corresponding path program 8 times [2019-11-15 22:33:17,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:17,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815492570] [2019-11-15 22:33:17,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:17,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:17,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 30 proven. 53 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:17,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815492570] [2019-11-15 22:33:17,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020317991] [2019-11-15 22:33:17,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:17,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:33:17,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:17,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-15 22:33:17,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:17,993 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:17,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2019-11-15 22:33:17,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366178926] [2019-11-15 22:33:17,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-15 22:33:17,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-15 22:33:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2019-11-15 22:33:17,995 INFO L87 Difference]: Start difference. First operand 620 states and 692 transitions. Second operand 31 states. [2019-11-15 22:33:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:19,217 INFO L93 Difference]: Finished difference Result 762 states and 845 transitions. [2019-11-15 22:33:19,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 22:33:19,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2019-11-15 22:33:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:19,221 INFO L225 Difference]: With dead ends: 762 [2019-11-15 22:33:19,222 INFO L226 Difference]: Without dead ends: 762 [2019-11-15 22:33:19,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2019-11-15 22:33:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2019-11-15 22:33:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 655. [2019-11-15 22:33:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 655 states. [2019-11-15 22:33:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 733 transitions. [2019-11-15 22:33:19,240 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 733 transitions. Word has length 70 [2019-11-15 22:33:19,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:19,241 INFO L462 AbstractCegarLoop]: Abstraction has 655 states and 733 transitions. [2019-11-15 22:33:19,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-15 22:33:19,241 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 733 transitions. [2019-11-15 22:33:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-15 22:33:19,243 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:19,243 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:19,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:19,448 INFO L410 AbstractCegarLoop]: === Iteration 36 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1953664988, now seen corresponding path program 8 times [2019-11-15 22:33:19,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:19,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383678951] [2019-11-15 22:33:19,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:19,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:19,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 33 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:19,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383678951] [2019-11-15 22:33:19,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629202795] [2019-11-15 22:33:19,835 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:20,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:33:20,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:20,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 52 conjunts are in the unsatisfiable core [2019-11-15 22:33:20,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:20,303 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:20,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2019-11-15 22:33:20,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745442949] [2019-11-15 22:33:20,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-15 22:33:20,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:20,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-15 22:33:20,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2019-11-15 22:33:20,305 INFO L87 Difference]: Start difference. First operand 655 states and 733 transitions. Second operand 28 states. [2019-11-15 22:33:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:21,519 INFO L93 Difference]: Finished difference Result 765 states and 850 transitions. [2019-11-15 22:33:21,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 22:33:21,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2019-11-15 22:33:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:21,523 INFO L225 Difference]: With dead ends: 765 [2019-11-15 22:33:21,524 INFO L226 Difference]: Without dead ends: 765 [2019-11-15 22:33:21,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2019-11-15 22:33:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-11-15 22:33:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 748. [2019-11-15 22:33:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2019-11-15 22:33:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 838 transitions. [2019-11-15 22:33:21,541 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 838 transitions. Word has length 74 [2019-11-15 22:33:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:21,542 INFO L462 AbstractCegarLoop]: Abstraction has 748 states and 838 transitions. [2019-11-15 22:33:21,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-15 22:33:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 838 transitions. [2019-11-15 22:33:21,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-15 22:33:21,544 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:21,544 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:21,748 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:21,749 INFO L410 AbstractCegarLoop]: === Iteration 37 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1045914642, now seen corresponding path program 9 times [2019-11-15 22:33:21,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:21,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103665167] [2019-11-15 22:33:21,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:21,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:21,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:22,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103665167] [2019-11-15 22:33:22,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000759742] [2019-11-15 22:33:22,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:22,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-15 22:33:22,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:22,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 72 conjunts are in the unsatisfiable core [2019-11-15 22:33:22,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:22,486 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:22,486 INFO L375 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 25 [2019-11-15 22:33:22,487 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,509 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:33:22,510 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,510 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:33:22,758 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-15 22:33:22,758 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,764 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:22,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,765 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2019-11-15 22:33:22,850 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-15 22:33:22,850 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,854 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:22,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:22,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-15 22:33:23,091 INFO L375 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 [2019-11-15 22:33:23,092 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:23,093 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:23,094 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:23,094 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-15 22:33:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:23,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:23,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 37 [2019-11-15 22:33:23,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085198202] [2019-11-15 22:33:23,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-15 22:33:23,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-15 22:33:23,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 22:33:23,117 INFO L87 Difference]: Start difference. First operand 748 states and 838 transitions. Second operand 37 states. [2019-11-15 22:33:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:25,702 INFO L93 Difference]: Finished difference Result 1155 states and 1276 transitions. [2019-11-15 22:33:25,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-15 22:33:25,712 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 75 [2019-11-15 22:33:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:25,720 INFO L225 Difference]: With dead ends: 1155 [2019-11-15 22:33:25,720 INFO L226 Difference]: Without dead ends: 1013 [2019-11-15 22:33:25,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=419, Invalid=4551, Unknown=0, NotChecked=0, Total=4970 [2019-11-15 22:33:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2019-11-15 22:33:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 910. [2019-11-15 22:33:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 910 states. [2019-11-15 22:33:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1022 transitions. [2019-11-15 22:33:25,745 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1022 transitions. Word has length 75 [2019-11-15 22:33:25,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:25,745 INFO L462 AbstractCegarLoop]: Abstraction has 910 states and 1022 transitions. [2019-11-15 22:33:25,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-15 22:33:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1022 transitions. [2019-11-15 22:33:25,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-15 22:33:25,747 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:25,748 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:25,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:25,952 INFO L410 AbstractCegarLoop]: === Iteration 38 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 440545713, now seen corresponding path program 10 times [2019-11-15 22:33:25,953 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:25,953 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489413158] [2019-11-15 22:33:25,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:25,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:25,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 47 proven. 79 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:26,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489413158] [2019-11-15 22:33:26,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036346009] [2019-11-15 22:33:26,376 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:26,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:33:26,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:26,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-15 22:33:26,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:33:26,847 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:26,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 32 [2019-11-15 22:33:26,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63388066] [2019-11-15 22:33:26,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 22:33:26,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 22:33:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:33:26,849 INFO L87 Difference]: Start difference. First operand 910 states and 1022 transitions. Second operand 33 states. [2019-11-15 22:33:28,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:33:28,443 INFO L93 Difference]: Finished difference Result 1102 states and 1227 transitions. [2019-11-15 22:33:28,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-15 22:33:28,443 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 79 [2019-11-15 22:33:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:33:28,448 INFO L225 Difference]: With dead ends: 1102 [2019-11-15 22:33:28,448 INFO L226 Difference]: Without dead ends: 1102 [2019-11-15 22:33:28,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2019-11-15 22:33:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2019-11-15 22:33:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 950. [2019-11-15 22:33:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 950 states. [2019-11-15 22:33:28,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1069 transitions. [2019-11-15 22:33:28,477 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1069 transitions. Word has length 79 [2019-11-15 22:33:28,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:33:28,478 INFO L462 AbstractCegarLoop]: Abstraction has 950 states and 1069 transitions. [2019-11-15 22:33:28,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 22:33:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1069 transitions. [2019-11-15 22:33:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-15 22:33:28,480 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:33:28,480 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:33:28,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:28,685 INFO L410 AbstractCegarLoop]: === Iteration 39 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:33:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:33:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash -27278426, now seen corresponding path program 9 times [2019-11-15 22:33:28,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:33:28,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466600771] [2019-11-15 22:33:28,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:28,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:33:28,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:33:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:33:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:29,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466600771] [2019-11-15 22:33:29,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673926619] [2019-11-15 22:33:29,266 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:33:29,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-15 22:33:29,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:33:29,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 74 conjunts are in the unsatisfiable core [2019-11-15 22:33:29,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:33:29,550 INFO L375 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 [2019-11-15 22:33:29,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:29,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:29,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:29,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 22:33:29,701 INFO L375 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 13 treesize of output 9 [2019-11-15 22:33:29,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:29,708 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:29,708 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:29,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-15 22:33:29,723 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:33:29,725 INFO L375 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 24 treesize of output 23 [2019-11-15 22:33:29,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:29,734 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:29,734 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-15 22:33:29,734 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:27 [2019-11-15 22:33:30,299 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 25 treesize of output 10 [2019-11-15 22:33:30,299 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:33:30,304 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:33:30,304 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:33:30,304 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:3 [2019-11-15 22:33:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:33:30,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:33:30,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 33 [2019-11-15 22:33:30,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678145390] [2019-11-15 22:33:30,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 22:33:30,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:33:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 22:33:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:33:30,354 INFO L87 Difference]: Start difference. First operand 950 states and 1069 transitions. Second operand 33 states. [2019-11-15 22:33:35,439 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-15 22:33:43,530 WARN L191 SmtUtils]: Spent 8.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:33:47,627 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-15 22:33:51,797 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-15 22:33:55,881 WARN L191 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 43 [2019-11-15 22:34:00,063 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-15 22:34:04,251 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 42 [2019-11-15 22:34:08,335 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-11-15 22:34:12,393 WARN L191 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 46 [2019-11-15 22:34:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:34:12,509 INFO L93 Difference]: Finished difference Result 1552 states and 1737 transitions. [2019-11-15 22:34:12,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-15 22:34:12,510 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 82 [2019-11-15 22:34:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:34:12,515 INFO L225 Difference]: With dead ends: 1552 [2019-11-15 22:34:12,515 INFO L226 Difference]: Without dead ends: 1142 [2019-11-15 22:34:12,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=203, Invalid=2247, Unknown=0, NotChecked=0, Total=2450 [2019-11-15 22:34:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2019-11-15 22:34:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1024. [2019-11-15 22:34:12,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-11-15 22:34:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1152 transitions. [2019-11-15 22:34:12,539 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1152 transitions. Word has length 82 [2019-11-15 22:34:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:34:12,539 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1152 transitions. [2019-11-15 22:34:12,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 22:34:12,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1152 transitions. [2019-11-15 22:34:12,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-15 22:34:12,542 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:34:12,542 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2019-11-15 22:34:12,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:12,755 INFO L410 AbstractCegarLoop]: === Iteration 40 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:34:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:34:12,755 INFO L82 PathProgramCache]: Analyzing trace with hash -926170250, now seen corresponding path program 11 times [2019-11-15 22:34:12,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:34:12,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142644888] [2019-11-15 22:34:12,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:12,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:12,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:34:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:13,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142644888] [2019-11-15 22:34:13,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606529751] [2019-11-15 22:34:13,271 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:13,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-15 22:34:13,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:34:13,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 77 conjunts are in the unsatisfiable core [2019-11-15 22:34:13,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:34:13,751 INFO L375 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 14 treesize of output 10 [2019-11-15 22:34:13,751 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:13,758 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:13,759 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:34:13,759 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:34:14,116 INFO L375 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 [2019-11-15 22:34:14,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:14,123 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:14,123 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:34:14,123 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:34:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:14,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:34:14,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 39 [2019-11-15 22:34:14,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721224909] [2019-11-15 22:34:14,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-15 22:34:14,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:34:14,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-15 22:34:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2019-11-15 22:34:14,145 INFO L87 Difference]: Start difference. First operand 1024 states and 1152 transitions. Second operand 39 states. [2019-11-15 22:34:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:34:17,776 INFO L93 Difference]: Finished difference Result 1576 states and 1748 transitions. [2019-11-15 22:34:17,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-15 22:34:17,777 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2019-11-15 22:34:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:34:17,784 INFO L225 Difference]: With dead ends: 1576 [2019-11-15 22:34:17,785 INFO L226 Difference]: Without dead ends: 1347 [2019-11-15 22:34:17,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=401, Invalid=4155, Unknown=0, NotChecked=0, Total=4556 [2019-11-15 22:34:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2019-11-15 22:34:17,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1215. [2019-11-15 22:34:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1215 states. [2019-11-15 22:34:17,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1370 transitions. [2019-11-15 22:34:17,810 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1370 transitions. Word has length 84 [2019-11-15 22:34:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:34:17,810 INFO L462 AbstractCegarLoop]: Abstraction has 1215 states and 1370 transitions. [2019-11-15 22:34:17,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-15 22:34:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1370 transitions. [2019-11-15 22:34:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-15 22:34:17,813 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:34:17,814 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:34:18,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:18,019 INFO L410 AbstractCegarLoop]: === Iteration 41 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:34:18,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:34:18,019 INFO L82 PathProgramCache]: Analyzing trace with hash -958830397, now seen corresponding path program 10 times [2019-11-15 22:34:18,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:34:18,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965528933] [2019-11-15 22:34:18,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:18,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:18,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:34:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:34:18,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965528933] [2019-11-15 22:34:18,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995648223] [2019-11-15 22:34:18,506 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:18,749 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:34:18,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:34:18,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-15 22:34:18,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:34:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:34:19,145 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:34:19,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 29 [2019-11-15 22:34:19,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155432680] [2019-11-15 22:34:19,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-15 22:34:19,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:34:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-15 22:34:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2019-11-15 22:34:19,148 INFO L87 Difference]: Start difference. First operand 1215 states and 1370 transitions. Second operand 30 states. [2019-11-15 22:34:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:34:20,673 INFO L93 Difference]: Finished difference Result 1396 states and 1567 transitions. [2019-11-15 22:34:20,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 22:34:20,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2019-11-15 22:34:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:34:20,682 INFO L225 Difference]: With dead ends: 1396 [2019-11-15 22:34:20,682 INFO L226 Difference]: Without dead ends: 1396 [2019-11-15 22:34:20,683 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2019-11-15 22:34:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2019-11-15 22:34:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1374. [2019-11-15 22:34:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1374 states. [2019-11-15 22:34:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 1551 transitions. [2019-11-15 22:34:20,710 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 1551 transitions. Word has length 86 [2019-11-15 22:34:20,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:34:20,711 INFO L462 AbstractCegarLoop]: Abstraction has 1374 states and 1551 transitions. [2019-11-15 22:34:20,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-15 22:34:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 1551 transitions. [2019-11-15 22:34:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-15 22:34:20,714 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:34:20,714 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 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] [2019-11-15 22:34:20,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:20,919 INFO L410 AbstractCegarLoop]: === Iteration 42 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:34:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:34:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -551880429, now seen corresponding path program 12 times [2019-11-15 22:34:20,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:34:20,919 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148090459] [2019-11-15 22:34:20,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:20,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:20,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:34:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:21,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148090459] [2019-11-15 22:34:21,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865022168] [2019-11-15 22:34:21,480 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:21,784 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-15 22:34:21,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:34:21,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-15 22:34:21,789 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:34:21,804 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:21,804 INFO L375 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 25 [2019-11-15 22:34:21,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:21,822 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:34:21,822 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:34:21,822 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:34:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 112 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:22,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:34:22,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 43 [2019-11-15 22:34:22,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626494232] [2019-11-15 22:34:22,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-15 22:34:22,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:34:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-15 22:34:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2019-11-15 22:34:22,503 INFO L87 Difference]: Start difference. First operand 1374 states and 1551 transitions. Second operand 44 states. [2019-11-15 22:34:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:34:25,749 INFO L93 Difference]: Finished difference Result 1655 states and 1849 transitions. [2019-11-15 22:34:25,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-15 22:34:25,750 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 88 [2019-11-15 22:34:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:34:25,757 INFO L225 Difference]: With dead ends: 1655 [2019-11-15 22:34:25,758 INFO L226 Difference]: Without dead ends: 1655 [2019-11-15 22:34:25,758 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=447, Invalid=3213, Unknown=0, NotChecked=0, Total=3660 [2019-11-15 22:34:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2019-11-15 22:34:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1424. [2019-11-15 22:34:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1424 states. [2019-11-15 22:34:25,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 1610 transitions. [2019-11-15 22:34:25,783 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 1610 transitions. Word has length 88 [2019-11-15 22:34:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:34:25,784 INFO L462 AbstractCegarLoop]: Abstraction has 1424 states and 1610 transitions. [2019-11-15 22:34:25,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-15 22:34:25,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 1610 transitions. [2019-11-15 22:34:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-15 22:34:25,787 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:34:25,788 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2019-11-15 22:34:25,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:25,993 INFO L410 AbstractCegarLoop]: === Iteration 43 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:34:25,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:34:25,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2037233324, now seen corresponding path program 13 times [2019-11-15 22:34:25,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:34:25,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346665880] [2019-11-15 22:34:25,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:25,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:25,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:34:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:26,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346665880] [2019-11-15 22:34:26,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197226366] [2019-11-15 22:34:26,738 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:26,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-15 22:34:26,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:34:27,248 INFO L375 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 14 treesize of output 10 [2019-11-15 22:34:27,248 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:27,254 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:27,255 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:34:27,255 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:34:27,487 INFO L375 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 [2019-11-15 22:34:27,488 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:27,490 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:27,490 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:34:27,490 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:34:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:34:27,508 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:34:27,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 42 [2019-11-15 22:34:27,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60274634] [2019-11-15 22:34:27,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-15 22:34:27,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:34:27,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-15 22:34:27,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2019-11-15 22:34:27,510 INFO L87 Difference]: Start difference. First operand 1424 states and 1610 transitions. Second operand 42 states. [2019-11-15 22:34:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:34:31,266 INFO L93 Difference]: Finished difference Result 2114 states and 2358 transitions. [2019-11-15 22:34:31,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-15 22:34:31,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 93 [2019-11-15 22:34:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:34:31,281 INFO L225 Difference]: With dead ends: 2114 [2019-11-15 22:34:31,281 INFO L226 Difference]: Without dead ends: 1853 [2019-11-15 22:34:31,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=439, Invalid=4963, Unknown=0, NotChecked=0, Total=5402 [2019-11-15 22:34:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2019-11-15 22:34:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1678. [2019-11-15 22:34:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1678 states. [2019-11-15 22:34:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 1902 transitions. [2019-11-15 22:34:31,317 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 1902 transitions. Word has length 93 [2019-11-15 22:34:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:34:31,319 INFO L462 AbstractCegarLoop]: Abstraction has 1678 states and 1902 transitions. [2019-11-15 22:34:31,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-15 22:34:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 1902 transitions. [2019-11-15 22:34:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-15 22:34:31,323 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:34:31,324 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:34:31,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:31,529 INFO L410 AbstractCegarLoop]: === Iteration 44 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:34:31,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:34:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 305055117, now seen corresponding path program 11 times [2019-11-15 22:34:31,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:34:31,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712330634] [2019-11-15 22:34:31,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:31,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:34:31,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:34:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:34:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:34:32,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712330634] [2019-11-15 22:34:32,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010785434] [2019-11-15 22:34:32,178 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:34:32,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-15 22:34:32,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:34:32,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 80 conjunts are in the unsatisfiable core [2019-11-15 22:34:32,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:34:32,466 INFO L375 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 [2019-11-15 22:34:32,467 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:32,471 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:32,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:34:32,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:34:32,781 INFO L375 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 14 treesize of output 10 [2019-11-15 22:34:32,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:32,790 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:32,790 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:34:32,791 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:34:32,851 INFO L375 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 25 treesize of output 24 [2019-11-15 22:34:32,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:34:32,862 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:32,863 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:34:32,863 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:34:33,708 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:34:33,709 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:34:33,709 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:34:33,725 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:34:33,725 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:34:33,726 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:34:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:34:33,772 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:34:33,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2019-11-15 22:34:33,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057587137] [2019-11-15 22:34:33,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-15 22:34:33,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:34:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-15 22:34:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2019-11-15 22:34:33,774 INFO L87 Difference]: Start difference. First operand 1678 states and 1902 transitions. Second operand 43 states. [2019-11-15 22:34:39,349 WARN L191 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-11-15 22:34:43,596 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:34:47,840 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:34:52,315 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:34:56,764 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:35:01,115 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:35:05,465 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:35:09,590 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-15 22:35:13,721 WARN L191 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-15 22:35:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:35:13,901 INFO L93 Difference]: Finished difference Result 2811 states and 3177 transitions. [2019-11-15 22:35:13,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-15 22:35:13,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2019-11-15 22:35:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:35:13,909 INFO L225 Difference]: With dead ends: 2811 [2019-11-15 22:35:13,910 INFO L226 Difference]: Without dead ends: 1940 [2019-11-15 22:35:13,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=267, Invalid=3893, Unknown=0, NotChecked=0, Total=4160 [2019-11-15 22:35:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2019-11-15 22:35:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1765. [2019-11-15 22:35:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1765 states. [2019-11-15 22:35:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 1999 transitions. [2019-11-15 22:35:13,937 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 1999 transitions. Word has length 94 [2019-11-15 22:35:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:35:13,938 INFO L462 AbstractCegarLoop]: Abstraction has 1765 states and 1999 transitions. [2019-11-15 22:35:13,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-15 22:35:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 1999 transitions. [2019-11-15 22:35:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-15 22:35:13,941 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:35:13,941 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 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] [2019-11-15 22:35:14,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:14,147 INFO L410 AbstractCegarLoop]: === Iteration 45 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:35:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:35:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 513348695, now seen corresponding path program 14 times [2019-11-15 22:35:14,147 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:35:14,147 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461038740] [2019-11-15 22:35:14,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:14,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:14,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:35:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 93 proven. 146 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:35:14,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461038740] [2019-11-15 22:35:14,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480553861] [2019-11-15 22:35:14,760 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:14,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:35:14,971 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:35:14,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 82 conjunts are in the unsatisfiable core [2019-11-15 22:35:14,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:35:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 91 proven. 148 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:35:15,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:35:15,373 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 39 [2019-11-15 22:35:15,373 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319635074] [2019-11-15 22:35:15,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-15 22:35:15,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:35:15,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-15 22:35:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2019-11-15 22:35:15,375 INFO L87 Difference]: Start difference. First operand 1765 states and 1999 transitions. Second operand 40 states. [2019-11-15 22:35:17,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:35:17,666 INFO L93 Difference]: Finished difference Result 2116 states and 2369 transitions. [2019-11-15 22:35:17,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-15 22:35:17,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2019-11-15 22:35:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:35:17,675 INFO L225 Difference]: With dead ends: 2116 [2019-11-15 22:35:17,676 INFO L226 Difference]: Without dead ends: 2116 [2019-11-15 22:35:17,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=326, Invalid=2430, Unknown=0, NotChecked=0, Total=2756 [2019-11-15 22:35:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2019-11-15 22:35:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1820. [2019-11-15 22:35:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1820 states. [2019-11-15 22:35:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2064 transitions. [2019-11-15 22:35:17,704 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2064 transitions. Word has length 97 [2019-11-15 22:35:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:35:17,705 INFO L462 AbstractCegarLoop]: Abstraction has 1820 states and 2064 transitions. [2019-11-15 22:35:17,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-15 22:35:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2064 transitions. [2019-11-15 22:35:17,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-15 22:35:17,708 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:35:17,708 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:35:17,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:17,914 INFO L410 AbstractCegarLoop]: === Iteration 46 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:35:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:35:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1697687338, now seen corresponding path program 12 times [2019-11-15 22:35:17,915 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:35:17,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30349162] [2019-11-15 22:35:17,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:17,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:17,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:35:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 73 proven. 150 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:35:18,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30349162] [2019-11-15 22:35:18,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235982884] [2019-11-15 22:35:18,432 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:18,706 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-15 22:35:18,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:35:18,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 64 conjunts are in the unsatisfiable core [2019-11-15 22:35:18,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:35:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 157 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:35:19,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:35:19,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2019-11-15 22:35:19,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216164363] [2019-11-15 22:35:19,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-15 22:35:19,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:35:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-15 22:35:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2019-11-15 22:35:19,126 INFO L87 Difference]: Start difference. First operand 1820 states and 2064 transitions. Second operand 33 states. [2019-11-15 22:35:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:35:21,298 INFO L93 Difference]: Finished difference Result 2052 states and 2319 transitions. [2019-11-15 22:35:21,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-15 22:35:21,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 98 [2019-11-15 22:35:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:35:21,309 INFO L225 Difference]: With dead ends: 2052 [2019-11-15 22:35:21,310 INFO L226 Difference]: Without dead ends: 2052 [2019-11-15 22:35:21,310 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2019-11-15 22:35:21,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2019-11-15 22:35:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 2027. [2019-11-15 22:35:21,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2027 states. [2019-11-15 22:35:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 2301 transitions. [2019-11-15 22:35:21,337 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 2301 transitions. Word has length 98 [2019-11-15 22:35:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:35:21,338 INFO L462 AbstractCegarLoop]: Abstraction has 2027 states and 2301 transitions. [2019-11-15 22:35:21,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-15 22:35:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 2301 transitions. [2019-11-15 22:35:21,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-15 22:35:21,341 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:35:21,341 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2019-11-15 22:35:21,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:21,547 INFO L410 AbstractCegarLoop]: === Iteration 47 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:35:21,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:35:21,547 INFO L82 PathProgramCache]: Analyzing trace with hash -860448624, now seen corresponding path program 15 times [2019-11-15 22:35:21,547 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:35:21,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729445691] [2019-11-15 22:35:21,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:21,548 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:21,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:35:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:35:22,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729445691] [2019-11-15 22:35:22,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003839881] [2019-11-15 22:35:22,515 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:22,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-15 22:35:22,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:35:22,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-15 22:35:22,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:35:23,454 INFO L375 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 14 treesize of output 10 [2019-11-15 22:35:23,455 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:35:23,464 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:23,464 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:35:23,464 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:35:23,863 INFO L375 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 [2019-11-15 22:35:23,863 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:35:23,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:23,866 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:35:23,866 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:35:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 23 proven. 253 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:35:23,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:35:23,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 45 [2019-11-15 22:35:23,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74470796] [2019-11-15 22:35:23,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-15 22:35:23,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:35:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-15 22:35:23,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2019-11-15 22:35:23,893 INFO L87 Difference]: Start difference. First operand 2027 states and 2301 transitions. Second operand 45 states. [2019-11-15 22:35:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:35:28,329 INFO L93 Difference]: Finished difference Result 2969 states and 3325 transitions. [2019-11-15 22:35:28,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-15 22:35:28,329 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2019-11-15 22:35:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:35:28,343 INFO L225 Difference]: With dead ends: 2969 [2019-11-15 22:35:28,344 INFO L226 Difference]: Without dead ends: 2594 [2019-11-15 22:35:28,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=477, Invalid=5843, Unknown=0, NotChecked=0, Total=6320 [2019-11-15 22:35:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2019-11-15 22:35:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2358. [2019-11-15 22:35:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2358 states. [2019-11-15 22:35:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 2683 transitions. [2019-11-15 22:35:28,379 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 2683 transitions. Word has length 102 [2019-11-15 22:35:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:35:28,379 INFO L462 AbstractCegarLoop]: Abstraction has 2358 states and 2683 transitions. [2019-11-15 22:35:28,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-15 22:35:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 2683 transitions. [2019-11-15 22:35:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-15 22:35:28,383 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:35:28,383 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:35:28,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:28,589 INFO L410 AbstractCegarLoop]: === Iteration 48 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:35:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:35:28,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1544508172, now seen corresponding path program 13 times [2019-11-15 22:35:28,590 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:35:28,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911978606] [2019-11-15 22:35:28,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:28,591 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:35:28,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:35:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:35:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911978606] [2019-11-15 22:35:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899364858] [2019-11-15 22:35:29,605 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:35:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:35:29,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 90 conjunts are in the unsatisfiable core [2019-11-15 22:35:29,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:35:29,902 INFO L375 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 [2019-11-15 22:35:29,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:35:29,907 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:29,908 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:35:29,908 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:35:30,523 INFO L375 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 14 treesize of output 10 [2019-11-15 22:35:30,523 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:35:30,532 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:30,533 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:35:30,533 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:35:30,628 INFO L375 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 25 treesize of output 24 [2019-11-15 22:35:30,629 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:35:30,642 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:30,643 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:35:30,643 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:35:32,016 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:35:32,017 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:35:32,017 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:35:32,033 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:35:32,033 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:35:32,034 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:35:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:35:32,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:35:32,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 47 [2019-11-15 22:35:32,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447144216] [2019-11-15 22:35:32,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-15 22:35:32,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:35:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-15 22:35:32,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2019-11-15 22:35:32,096 INFO L87 Difference]: Start difference. First operand 2358 states and 2683 transitions. Second operand 47 states. [2019-11-15 22:35:41,797 WARN L191 SmtUtils]: Spent 7.62 s on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2019-11-15 22:35:45,996 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:35:50,312 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:35:54,974 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:35:59,609 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:36:04,146 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:36:08,653 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:36:13,164 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:36:17,310 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2019-11-15 22:36:21,455 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-11-15 22:36:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:21,753 INFO L93 Difference]: Finished difference Result 3994 states and 4537 transitions. [2019-11-15 22:36:21,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-15 22:36:21,754 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 106 [2019-11-15 22:36:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:21,764 INFO L225 Difference]: With dead ends: 3994 [2019-11-15 22:36:21,764 INFO L226 Difference]: Without dead ends: 2696 [2019-11-15 22:36:21,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=290, Invalid=4680, Unknown=0, NotChecked=0, Total=4970 [2019-11-15 22:36:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2019-11-15 22:36:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2454. [2019-11-15 22:36:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2454 states. [2019-11-15 22:36:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 2790 transitions. [2019-11-15 22:36:21,792 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 2790 transitions. Word has length 106 [2019-11-15 22:36:21,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:21,793 INFO L462 AbstractCegarLoop]: Abstraction has 2454 states and 2790 transitions. [2019-11-15 22:36:21,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-15 22:36:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 2790 transitions. [2019-11-15 22:36:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-15 22:36:21,795 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:21,795 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 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] [2019-11-15 22:36:21,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:21,997 INFO L410 AbstractCegarLoop]: === Iteration 49 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:36:21,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:21,997 INFO L82 PathProgramCache]: Analyzing trace with hash -184516371, now seen corresponding path program 16 times [2019-11-15 22:36:21,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:21,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971449207] [2019-11-15 22:36:21,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:21,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:21,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 122 proven. 187 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:22,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971449207] [2019-11-15 22:36:22,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499403034] [2019-11-15 22:36:22,672 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:22,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:36:22,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:22,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 88 conjunts are in the unsatisfiable core [2019-11-15 22:36:22,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 128 proven. 181 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:23,381 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:23,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 41 [2019-11-15 22:36:23,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269951014] [2019-11-15 22:36:23,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-15 22:36:23,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-15 22:36:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2019-11-15 22:36:23,383 INFO L87 Difference]: Start difference. First operand 2454 states and 2790 transitions. Second operand 42 states. [2019-11-15 22:36:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:25,945 INFO L93 Difference]: Finished difference Result 2922 states and 3281 transitions. [2019-11-15 22:36:25,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-15 22:36:25,946 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 106 [2019-11-15 22:36:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:25,962 INFO L225 Difference]: With dead ends: 2922 [2019-11-15 22:36:25,962 INFO L226 Difference]: Without dead ends: 2922 [2019-11-15 22:36:25,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=2714, Unknown=0, NotChecked=0, Total=3080 [2019-11-15 22:36:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2019-11-15 22:36:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2519. [2019-11-15 22:36:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2519 states. [2019-11-15 22:36:26,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 2867 transitions. [2019-11-15 22:36:26,002 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 2867 transitions. Word has length 106 [2019-11-15 22:36:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:26,002 INFO L462 AbstractCegarLoop]: Abstraction has 2519 states and 2867 transitions. [2019-11-15 22:36:26,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-15 22:36:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 2867 transitions. [2019-11-15 22:36:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-15 22:36:26,007 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:26,007 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:26,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:26,212 INFO L410 AbstractCegarLoop]: === Iteration 50 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:36:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash -326890735, now seen corresponding path program 14 times [2019-11-15 22:36:26,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:26,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074936936] [2019-11-15 22:36:26,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:26,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:26,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 99 proven. 203 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:26,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074936936] [2019-11-15 22:36:26,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563352840] [2019-11-15 22:36:26,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:27,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:36:27,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:27,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-15 22:36:27,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:27,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:27,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 36 [2019-11-15 22:36:27,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052595818] [2019-11-15 22:36:27,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-15 22:36:27,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:27,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-15 22:36:27,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2019-11-15 22:36:27,425 INFO L87 Difference]: Start difference. First operand 2519 states and 2867 transitions. Second operand 37 states. [2019-11-15 22:36:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:29,285 INFO L93 Difference]: Finished difference Result 2802 states and 3180 transitions. [2019-11-15 22:36:29,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-15 22:36:29,286 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 110 [2019-11-15 22:36:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:29,291 INFO L225 Difference]: With dead ends: 2802 [2019-11-15 22:36:29,292 INFO L226 Difference]: Without dead ends: 2802 [2019-11-15 22:36:29,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2019-11-15 22:36:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2019-11-15 22:36:29,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2774. [2019-11-15 22:36:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2774 states. [2019-11-15 22:36:29,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 3160 transitions. [2019-11-15 22:36:29,328 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 3160 transitions. Word has length 110 [2019-11-15 22:36:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:29,329 INFO L462 AbstractCegarLoop]: Abstraction has 2774 states and 3160 transitions. [2019-11-15 22:36:29,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-15 22:36:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 3160 transitions. [2019-11-15 22:36:29,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-15 22:36:29,333 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:29,333 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2019-11-15 22:36:29,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:29,539 INFO L410 AbstractCegarLoop]: === Iteration 51 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:36:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash 705272250, now seen corresponding path program 17 times [2019-11-15 22:36:29,539 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:29,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025786199] [2019-11-15 22:36:29,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:29,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:29,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:30,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025786199] [2019-11-15 22:36:30,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340944471] [2019-11-15 22:36:30,470 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:30,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-15 22:36:30,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:30,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-15 22:36:30,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:31,432 INFO L375 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 14 treesize of output 10 [2019-11-15 22:36:31,432 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:31,440 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:31,440 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:31,440 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:36:31,823 INFO L375 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 [2019-11-15 22:36:31,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:31,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:31,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:31,826 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:36:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 26 proven. 325 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:31,848 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:31,848 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29] total 48 [2019-11-15 22:36:31,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112049051] [2019-11-15 22:36:31,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-15 22:36:31,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:31,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-15 22:36:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2019-11-15 22:36:31,849 INFO L87 Difference]: Start difference. First operand 2774 states and 3160 transitions. Second operand 48 states. [2019-11-15 22:36:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:37,748 INFO L93 Difference]: Finished difference Result 4004 states and 4500 transitions. [2019-11-15 22:36:37,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-15 22:36:37,748 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 111 [2019-11-15 22:36:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:37,754 INFO L225 Difference]: With dead ends: 4004 [2019-11-15 22:36:37,754 INFO L226 Difference]: Without dead ends: 3497 [2019-11-15 22:36:37,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=515, Invalid=6795, Unknown=0, NotChecked=0, Total=7310 [2019-11-15 22:36:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2019-11-15 22:36:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 3192. [2019-11-15 22:36:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3192 states. [2019-11-15 22:36:37,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3192 states to 3192 states and 3644 transitions. [2019-11-15 22:36:37,785 INFO L78 Accepts]: Start accepts. Automaton has 3192 states and 3644 transitions. Word has length 111 [2019-11-15 22:36:37,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:37,785 INFO L462 AbstractCegarLoop]: Abstraction has 3192 states and 3644 transitions. [2019-11-15 22:36:37,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-15 22:36:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3192 states and 3644 transitions. [2019-11-15 22:36:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-15 22:36:37,788 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:37,788 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 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] [2019-11-15 22:36:37,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:37,989 INFO L410 AbstractCegarLoop]: === Iteration 52 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:36:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1861039619, now seen corresponding path program 18 times [2019-11-15 22:36:37,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:37,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345079194] [2019-11-15 22:36:37,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:37,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:37,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 155 proven. 233 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:38,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345079194] [2019-11-15 22:36:38,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27047168] [2019-11-15 22:36:38,938 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:39,375 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-15 22:36:39,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:39,379 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-15 22:36:39,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:39,395 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:39,395 INFO L375 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 25 [2019-11-15 22:36:39,396 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:39,415 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:36:39,415 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:39,415 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:36:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 153 proven. 235 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:36:40,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:40,468 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2019-11-15 22:36:40,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71764532] [2019-11-15 22:36:40,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-15 22:36:40,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:40,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-15 22:36:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2742, Unknown=0, NotChecked=0, Total=3080 [2019-11-15 22:36:40,469 INFO L87 Difference]: Start difference. First operand 3192 states and 3644 transitions. Second operand 56 states. [2019-11-15 22:36:44,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:36:44,574 INFO L93 Difference]: Finished difference Result 3750 states and 4227 transitions. [2019-11-15 22:36:44,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-15 22:36:44,574 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 115 [2019-11-15 22:36:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:36:44,582 INFO L225 Difference]: With dead ends: 3750 [2019-11-15 22:36:44,583 INFO L226 Difference]: Without dead ends: 3750 [2019-11-15 22:36:44,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=705, Invalid=5457, Unknown=0, NotChecked=0, Total=6162 [2019-11-15 22:36:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2019-11-15 22:36:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3262. [2019-11-15 22:36:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3262 states. [2019-11-15 22:36:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 3727 transitions. [2019-11-15 22:36:44,637 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 3727 transitions. Word has length 115 [2019-11-15 22:36:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:36:44,637 INFO L462 AbstractCegarLoop]: Abstraction has 3262 states and 3727 transitions. [2019-11-15 22:36:44,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-15 22:36:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 3727 transitions. [2019-11-15 22:36:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-15 22:36:44,642 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:36:44,642 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:36:44,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:44,857 INFO L410 AbstractCegarLoop]: === Iteration 53 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:36:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:36:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1760639451, now seen corresponding path program 15 times [2019-11-15 22:36:44,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:36:44,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640155455] [2019-11-15 22:36:44,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:44,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:36:44,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:36:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:36:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:45,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640155455] [2019-11-15 22:36:45,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864231630] [2019-11-15 22:36:45,782 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:36:46,131 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-15 22:36:46,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:36:46,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-15 22:36:46,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:36:46,147 INFO L375 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 [2019-11-15 22:36:46,147 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:46,152 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:46,153 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:46,153 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:36:46,577 INFO L375 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 14 treesize of output 10 [2019-11-15 22:36:46,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:46,585 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:46,585 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:46,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:36:46,643 INFO L375 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 25 treesize of output 24 [2019-11-15 22:36:46,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:36:46,654 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:46,654 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:36:46,654 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:36:48,020 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:36:48,021 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:36:48,021 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:36:48,035 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:36:48,036 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:36:48,036 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:36:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:36:48,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:36:48,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2019-11-15 22:36:48,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036733633] [2019-11-15 22:36:48,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-15 22:36:48,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:36:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-15 22:36:48,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2019-11-15 22:36:48,116 INFO L87 Difference]: Start difference. First operand 3262 states and 3727 transitions. Second operand 51 states. [2019-11-15 22:36:54,461 WARN L191 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-11-15 22:36:58,679 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:02,982 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:07,419 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:11,843 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:16,238 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:20,559 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:24,896 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:29,252 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:37:33,365 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-15 22:37:37,497 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-15 22:37:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:37:37,729 INFO L93 Difference]: Finished difference Result 5567 states and 6356 transitions. [2019-11-15 22:37:37,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-15 22:37:37,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 118 [2019-11-15 22:37:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:37:37,735 INFO L225 Difference]: With dead ends: 5567 [2019-11-15 22:37:37,735 INFO L226 Difference]: Without dead ends: 3721 [2019-11-15 22:37:37,736 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=313, Invalid=5539, Unknown=0, NotChecked=0, Total=5852 [2019-11-15 22:37:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2019-11-15 22:37:37,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3372. [2019-11-15 22:37:37,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3372 states. [2019-11-15 22:37:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 3850 transitions. [2019-11-15 22:37:37,772 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 3850 transitions. Word has length 118 [2019-11-15 22:37:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:37:37,772 INFO L462 AbstractCegarLoop]: Abstraction has 3372 states and 3850 transitions. [2019-11-15 22:37:37,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-15 22:37:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 3850 transitions. [2019-11-15 22:37:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-15 22:37:37,776 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:37:37,776 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2019-11-15 22:37:37,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:37,981 INFO L410 AbstractCegarLoop]: === Iteration 54 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:37:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:37:37,981 INFO L82 PathProgramCache]: Analyzing trace with hash -162891094, now seen corresponding path program 19 times [2019-11-15 22:37:37,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:37:37,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674549112] [2019-11-15 22:37:37,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:37,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:37,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:37:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:38,901 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674549112] [2019-11-15 22:37:38,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446912227] [2019-11-15 22:37:38,902 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:39,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 117 conjunts are in the unsatisfiable core [2019-11-15 22:37:39,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:37:39,506 INFO L375 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 14 treesize of output 10 [2019-11-15 22:37:39,506 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:37:39,511 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:37:39,511 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:37:39,511 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:37:39,774 INFO L375 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 [2019-11-15 22:37:39,774 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:37:39,775 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:37:39,775 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:37:39,776 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:37:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 29 proven. 406 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:39,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:37:39,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 51 [2019-11-15 22:37:39,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151692279] [2019-11-15 22:37:39,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-15 22:37:39,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:37:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-15 22:37:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2413, Unknown=0, NotChecked=0, Total=2550 [2019-11-15 22:37:39,800 INFO L87 Difference]: Start difference. First operand 3372 states and 3850 transitions. Second operand 51 states. [2019-11-15 22:37:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:37:44,812 INFO L93 Difference]: Finished difference Result 4837 states and 5448 transitions. [2019-11-15 22:37:44,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-15 22:37:44,812 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 120 [2019-11-15 22:37:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:37:44,817 INFO L225 Difference]: With dead ends: 4837 [2019-11-15 22:37:44,818 INFO L226 Difference]: Without dead ends: 4180 [2019-11-15 22:37:44,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=553, Invalid=7819, Unknown=0, NotChecked=0, Total=8372 [2019-11-15 22:37:44,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2019-11-15 22:37:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 3834. [2019-11-15 22:37:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3834 states. [2019-11-15 22:37:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 4386 transitions. [2019-11-15 22:37:44,859 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 4386 transitions. Word has length 120 [2019-11-15 22:37:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:37:44,859 INFO L462 AbstractCegarLoop]: Abstraction has 3834 states and 4386 transitions. [2019-11-15 22:37:44,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-15 22:37:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 4386 transitions. [2019-11-15 22:37:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-15 22:37:44,863 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:37:44,863 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:37:45,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:45,067 INFO L410 AbstractCegarLoop]: === Iteration 55 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:37:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:37:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1908452232, now seen corresponding path program 16 times [2019-11-15 22:37:45,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:37:45,068 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49956837] [2019-11-15 22:37:45,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:45,068 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:45,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:37:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 129 proven. 264 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:37:45,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49956837] [2019-11-15 22:37:45,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207971712] [2019-11-15 22:37:45,679 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:45,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:37:45,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:37:45,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 85 conjunts are in the unsatisfiable core [2019-11-15 22:37:45,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:37:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:37:46,246 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:37:46,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 38 [2019-11-15 22:37:46,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012551749] [2019-11-15 22:37:46,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-15 22:37:46,247 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:37:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-15 22:37:46,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2019-11-15 22:37:46,248 INFO L87 Difference]: Start difference. First operand 3834 states and 4386 transitions. Second operand 39 states. [2019-11-15 22:37:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:37:48,138 INFO L93 Difference]: Finished difference Result 4228 states and 4827 transitions. [2019-11-15 22:37:48,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-15 22:37:48,139 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2019-11-15 22:37:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:37:48,151 INFO L225 Difference]: With dead ends: 4228 [2019-11-15 22:37:48,151 INFO L226 Difference]: Without dead ends: 4228 [2019-11-15 22:37:48,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2019-11-15 22:37:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4228 states. [2019-11-15 22:37:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4228 to 4195. [2019-11-15 22:37:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4195 states. [2019-11-15 22:37:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4195 states to 4195 states and 4803 transitions. [2019-11-15 22:37:48,194 INFO L78 Accepts]: Start accepts. Automaton has 4195 states and 4803 transitions. Word has length 122 [2019-11-15 22:37:48,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:37:48,194 INFO L462 AbstractCegarLoop]: Abstraction has 4195 states and 4803 transitions. [2019-11-15 22:37:48,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-15 22:37:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4195 states and 4803 transitions. [2019-11-15 22:37:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-15 22:37:48,198 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:37:48,198 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 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] [2019-11-15 22:37:48,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:48,403 INFO L410 AbstractCegarLoop]: === Iteration 56 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:37:48,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:37:48,403 INFO L82 PathProgramCache]: Analyzing trace with hash 500164039, now seen corresponding path program 20 times [2019-11-15 22:37:48,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:37:48,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504360673] [2019-11-15 22:37:48,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:48,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:48,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:37:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 192 proven. 284 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:49,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504360673] [2019-11-15 22:37:49,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296533495] [2019-11-15 22:37:49,288 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:49,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:37:49,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:37:49,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-15 22:37:49,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:37:49,629 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:37:49,630 INFO L375 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 25 [2019-11-15 22:37:49,630 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:37:49,652 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:37:49,652 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:37:49,652 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:37:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 190 proven. 286 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:50,884 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:37:50,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 59 [2019-11-15 22:37:50,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934494711] [2019-11-15 22:37:50,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-15 22:37:50,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:37:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-15 22:37:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=3193, Unknown=0, NotChecked=0, Total=3540 [2019-11-15 22:37:50,886 INFO L87 Difference]: Start difference. First operand 4195 states and 4803 transitions. Second operand 60 states. [2019-11-15 22:37:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:37:54,012 INFO L93 Difference]: Finished difference Result 4898 states and 5535 transitions. [2019-11-15 22:37:54,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-15 22:37:54,012 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2019-11-15 22:37:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:37:54,016 INFO L225 Difference]: With dead ends: 4898 [2019-11-15 22:37:54,016 INFO L226 Difference]: Without dead ends: 4898 [2019-11-15 22:37:54,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=535, Invalid=5165, Unknown=0, NotChecked=0, Total=5700 [2019-11-15 22:37:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2019-11-15 22:37:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4275. [2019-11-15 22:37:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4275 states. [2019-11-15 22:37:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 4898 transitions. [2019-11-15 22:37:54,078 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 4898 transitions. Word has length 124 [2019-11-15 22:37:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:37:54,078 INFO L462 AbstractCegarLoop]: Abstraction has 4275 states and 4898 transitions. [2019-11-15 22:37:54,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-15 22:37:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 4898 transitions. [2019-11-15 22:37:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-15 22:37:54,082 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:37:54,082 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2019-11-15 22:37:54,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:54,283 INFO L410 AbstractCegarLoop]: === Iteration 57 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:37:54,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:37:54,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1127820576, now seen corresponding path program 21 times [2019-11-15 22:37:54,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:37:54,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143662241] [2019-11-15 22:37:54,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:54,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:37:54,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:37:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:37:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:55,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143662241] [2019-11-15 22:37:55,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452182193] [2019-11-15 22:37:55,069 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:37:55,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-15 22:37:55,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:37:55,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-15 22:37:55,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:37:55,432 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:37:55,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:37:55,557 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-15 22:37:55,558 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:37:55,562 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:37:55,563 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:37:55,563 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-15 22:37:56,007 INFO L375 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 [2019-11-15 22:37:56,007 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:37:56,009 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:37:56,009 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:37:56,009 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-15 22:37:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 32 proven. 496 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:37:56,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:37:56,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 48 [2019-11-15 22:37:56,049 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275327019] [2019-11-15 22:37:56,049 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-15 22:37:56,050 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:37:56,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-15 22:37:56,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2130, Unknown=0, NotChecked=0, Total=2256 [2019-11-15 22:37:56,050 INFO L87 Difference]: Start difference. First operand 4275 states and 4898 transitions. Second operand 48 states. [2019-11-15 22:38:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:38:01,177 INFO L93 Difference]: Finished difference Result 5968 states and 6748 transitions. [2019-11-15 22:38:01,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-15 22:38:01,177 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 129 [2019-11-15 22:38:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:38:01,181 INFO L225 Difference]: With dead ends: 5968 [2019-11-15 22:38:01,181 INFO L226 Difference]: Without dead ends: 5252 [2019-11-15 22:38:01,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2367 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=515, Invalid=7675, Unknown=0, NotChecked=0, Total=8190 [2019-11-15 22:38:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5252 states. [2019-11-15 22:38:01,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5252 to 4835. [2019-11-15 22:38:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4835 states. [2019-11-15 22:38:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 5550 transitions. [2019-11-15 22:38:01,225 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 5550 transitions. Word has length 129 [2019-11-15 22:38:01,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:38:01,226 INFO L462 AbstractCegarLoop]: Abstraction has 4835 states and 5550 transitions. [2019-11-15 22:38:01,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-15 22:38:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 5550 transitions. [2019-11-15 22:38:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-15 22:38:01,229 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:38:01,230 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:38:01,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:38:01,430 INFO L410 AbstractCegarLoop]: === Iteration 58 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:38:01,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:38:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1255943234, now seen corresponding path program 17 times [2019-11-15 22:38:01,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:38:01,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310910859] [2019-11-15 22:38:01,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:38:01,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:38:01,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:38:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:38:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:38:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:38:02,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310910859] [2019-11-15 22:38:02,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56862630] [2019-11-15 22:38:02,481 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:38:02,819 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-15 22:38:02,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:38:02,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 110 conjunts are in the unsatisfiable core [2019-11-15 22:38:02,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:38:02,838 INFO L375 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 [2019-11-15 22:38:02,839 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:38:02,844 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:38:02,844 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:38:02,844 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:38:03,340 INFO L375 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 14 treesize of output 10 [2019-11-15 22:38:03,340 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:38:03,347 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:38:03,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:38:03,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:38:03,406 INFO L375 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 25 treesize of output 24 [2019-11-15 22:38:03,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:38:03,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:38:03,416 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:38:03,416 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:38:04,890 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:38:04,891 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:38:04,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:38:04,910 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:38:04,911 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:38:04,911 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:38:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:38:05,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:38:05,094 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 55 [2019-11-15 22:38:05,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495672164] [2019-11-15 22:38:05,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-15 22:38:05,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:38:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-15 22:38:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2019-11-15 22:38:05,096 INFO L87 Difference]: Start difference. First operand 4835 states and 5550 transitions. Second operand 55 states. [2019-11-15 22:38:11,257 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-15 22:38:15,436 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:19,708 WARN L191 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:22,723 WARN L191 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:27,125 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:31,528 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:35,934 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:40,253 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:44,585 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:48,908 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-15 22:38:53,018 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-15 22:38:57,137 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-15 22:38:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:38:57,393 INFO L93 Difference]: Finished difference Result 8401 states and 9646 transitions. [2019-11-15 22:38:57,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-15 22:38:57,393 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 130 [2019-11-15 22:38:57,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:38:57,397 INFO L225 Difference]: With dead ends: 8401 [2019-11-15 22:38:57,397 INFO L226 Difference]: Without dead ends: 5399 [2019-11-15 22:38:57,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=336, Invalid=6470, Unknown=0, NotChecked=0, Total=6806 [2019-11-15 22:38:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2019-11-15 22:38:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 4958. [2019-11-15 22:38:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4958 states. [2019-11-15 22:38:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 5687 transitions. [2019-11-15 22:38:57,446 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 5687 transitions. Word has length 130 [2019-11-15 22:38:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:38:57,446 INFO L462 AbstractCegarLoop]: Abstraction has 4958 states and 5687 transitions. [2019-11-15 22:38:57,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-15 22:38:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 5687 transitions. [2019-11-15 22:38:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-15 22:38:57,449 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:38:57,449 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 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] [2019-11-15 22:38:57,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:38:57,650 INFO L410 AbstractCegarLoop]: === Iteration 59 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:38:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:38:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 535687843, now seen corresponding path program 22 times [2019-11-15 22:38:57,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:38:57,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880461492] [2019-11-15 22:38:57,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:38:57,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:38:57,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:38:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:38:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:38:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 233 proven. 340 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:38:58,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880461492] [2019-11-15 22:38:58,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284007878] [2019-11-15 22:38:58,553 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:38:58,820 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:38:58,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:38:58,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-15 22:38:58,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:38:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 242 proven. 331 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:38:59,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:38:59,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 50 [2019-11-15 22:38:59,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132545908] [2019-11-15 22:38:59,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-15 22:38:59,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:38:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-15 22:38:59,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=2221, Unknown=0, NotChecked=0, Total=2550 [2019-11-15 22:38:59,452 INFO L87 Difference]: Start difference. First operand 4958 states and 5687 transitions. Second operand 51 states. [2019-11-15 22:39:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:39:02,272 INFO L93 Difference]: Finished difference Result 5771 states and 6531 transitions. [2019-11-15 22:39:02,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-15 22:39:02,273 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 133 [2019-11-15 22:39:02,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:39:02,276 INFO L225 Difference]: With dead ends: 5771 [2019-11-15 22:39:02,276 INFO L226 Difference]: Without dead ends: 5771 [2019-11-15 22:39:02,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=516, Invalid=4040, Unknown=0, NotChecked=0, Total=4556 [2019-11-15 22:39:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2019-11-15 22:39:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5043. [2019-11-15 22:39:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5043 states. [2019-11-15 22:39:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 5788 transitions. [2019-11-15 22:39:02,318 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 5788 transitions. Word has length 133 [2019-11-15 22:39:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:39:02,318 INFO L462 AbstractCegarLoop]: Abstraction has 5043 states and 5788 transitions. [2019-11-15 22:39:02,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-15 22:39:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 5788 transitions. [2019-11-15 22:39:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-15 22:39:02,321 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:39:02,321 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:39:02,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:02,522 INFO L410 AbstractCegarLoop]: === Iteration 60 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:39:02,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:39:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2144451745, now seen corresponding path program 18 times [2019-11-15 22:39:02,522 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:39:02,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901625685] [2019-11-15 22:39:02,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:02,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:02,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:39:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 163 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:39:02,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901625685] [2019-11-15 22:39:02,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863054543] [2019-11-15 22:39:02,990 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:03,337 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-15 22:39:03,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:39:03,341 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 81 conjunts are in the unsatisfiable core [2019-11-15 22:39:03,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:39:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 153 proven. 343 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:39:04,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:39:04,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2019-11-15 22:39:04,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006997169] [2019-11-15 22:39:04,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-15 22:39:04,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:39:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-15 22:39:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2019-11-15 22:39:04,094 INFO L87 Difference]: Start difference. First operand 5043 states and 5788 transitions. Second operand 53 states. [2019-11-15 22:39:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:39:06,340 INFO L93 Difference]: Finished difference Result 5508 states and 6311 transitions. [2019-11-15 22:39:06,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-15 22:39:06,341 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 134 [2019-11-15 22:39:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:39:06,344 INFO L225 Difference]: With dead ends: 5508 [2019-11-15 22:39:06,344 INFO L226 Difference]: Without dead ends: 5508 [2019-11-15 22:39:06,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=685, Invalid=5015, Unknown=0, NotChecked=0, Total=5700 [2019-11-15 22:39:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2019-11-15 22:39:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5472. [2019-11-15 22:39:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5472 states. [2019-11-15 22:39:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5472 states to 5472 states and 6285 transitions. [2019-11-15 22:39:06,381 INFO L78 Accepts]: Start accepts. Automaton has 5472 states and 6285 transitions. Word has length 134 [2019-11-15 22:39:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:39:06,381 INFO L462 AbstractCegarLoop]: Abstraction has 5472 states and 6285 transitions. [2019-11-15 22:39:06,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-15 22:39:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5472 states and 6285 transitions. [2019-11-15 22:39:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-15 22:39:06,385 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:39:06,385 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2019-11-15 22:39:06,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:06,586 INFO L410 AbstractCegarLoop]: === Iteration 61 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:39:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:39:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash -714290748, now seen corresponding path program 23 times [2019-11-15 22:39:06,586 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:39:06,586 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296902029] [2019-11-15 22:39:06,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:06,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:06,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:39:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 35 proven. 595 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:39:07,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296902029] [2019-11-15 22:39:07,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453838503] [2019-11-15 22:39:07,396 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:07,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-15 22:39:07,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:39:07,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 137 conjunts are in the unsatisfiable core [2019-11-15 22:39:07,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:39:08,185 INFO L375 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 14 treesize of output 10 [2019-11-15 22:39:08,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:39:08,190 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:08,190 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:39:08,190 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:39:08,445 INFO L375 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 [2019-11-15 22:39:08,445 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:39:08,446 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:08,446 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:39:08,446 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:39:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 35 proven. 595 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:39:08,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:39:08,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35] total 57 [2019-11-15 22:39:08,471 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881890168] [2019-11-15 22:39:08,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-15 22:39:08,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:39:08,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-15 22:39:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3039, Unknown=0, NotChecked=0, Total=3192 [2019-11-15 22:39:08,472 INFO L87 Difference]: Start difference. First operand 5472 states and 6285 transitions. Second operand 57 states. [2019-11-15 22:39:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:39:14,539 INFO L93 Difference]: Finished difference Result 7543 states and 8551 transitions. [2019-11-15 22:39:14,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-15 22:39:14,539 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 138 [2019-11-15 22:39:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:39:14,542 INFO L225 Difference]: With dead ends: 7543 [2019-11-15 22:39:14,542 INFO L226 Difference]: Without dead ends: 6650 [2019-11-15 22:39:14,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=629, Invalid=10083, Unknown=0, NotChecked=0, Total=10712 [2019-11-15 22:39:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6650 states. [2019-11-15 22:39:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6650 to 6144. [2019-11-15 22:39:14,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6144 states. [2019-11-15 22:39:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6144 states to 6144 states and 7069 transitions. [2019-11-15 22:39:14,588 INFO L78 Accepts]: Start accepts. Automaton has 6144 states and 7069 transitions. Word has length 138 [2019-11-15 22:39:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:39:14,589 INFO L462 AbstractCegarLoop]: Abstraction has 6144 states and 7069 transitions. [2019-11-15 22:39:14,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-15 22:39:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6144 states and 7069 transitions. [2019-11-15 22:39:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-15 22:39:14,595 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:39:14,595 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:39:14,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:14,797 INFO L410 AbstractCegarLoop]: === Iteration 62 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:39:14,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:39:14,797 INFO L82 PathProgramCache]: Analyzing trace with hash -675462103, now seen corresponding path program 19 times [2019-11-15 22:39:14,797 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:39:14,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543396367] [2019-11-15 22:39:14,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:14,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:39:14,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:39:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:39:15,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543396367] [2019-11-15 22:39:15,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396494933] [2019-11-15 22:39:15,650 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:39:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:39:15,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 120 conjunts are in the unsatisfiable core [2019-11-15 22:39:15,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:39:15,922 INFO L375 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 [2019-11-15 22:39:15,922 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:39:15,925 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:15,926 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:39:15,926 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-15 22:39:16,435 INFO L375 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 14 treesize of output 10 [2019-11-15 22:39:16,435 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:39:16,441 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:16,442 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:39:16,442 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-11-15 22:39:16,494 INFO L375 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 25 treesize of output 24 [2019-11-15 22:39:16,494 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:39:16,502 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:16,503 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:39:16,503 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2019-11-15 22:39:17,684 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:39:17,685 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 28 treesize of output 21 [2019-11-15 22:39:17,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:39:17,698 INFO L567 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2019-11-15 22:39:17,699 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:39:17,699 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2019-11-15 22:39:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:39:17,791 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:39:17,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2019-11-15 22:39:17,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873757635] [2019-11-15 22:39:17,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-15 22:39:17,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:39:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-15 22:39:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2019-11-15 22:39:17,793 INFO L87 Difference]: Start difference. First operand 6144 states and 7069 transitions. Second operand 59 states. [2019-11-15 22:39:24,329 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-11-15 22:39:28,524 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:32,817 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:37,325 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:41,919 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:46,536 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:51,128 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:39:55,691 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:40:00,150 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:40:04,662 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:40:09,215 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-11-15 22:40:13,360 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2019-11-15 22:40:17,491 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-11-15 22:40:17,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:17,906 INFO L93 Difference]: Finished difference Result 10759 states and 12388 transitions. [2019-11-15 22:40:17,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-15 22:40:17,906 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 142 [2019-11-15 22:40:17,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:17,910 INFO L225 Difference]: With dead ends: 10759 [2019-11-15 22:40:17,910 INFO L226 Difference]: Without dead ends: 6819 [2019-11-15 22:40:17,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=359, Invalid=7473, Unknown=0, NotChecked=0, Total=7832 [2019-11-15 22:40:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6819 states. [2019-11-15 22:40:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6819 to 6276. [2019-11-15 22:40:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6276 states. [2019-11-15 22:40:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6276 states to 6276 states and 7216 transitions. [2019-11-15 22:40:17,958 INFO L78 Accepts]: Start accepts. Automaton has 6276 states and 7216 transitions. Word has length 142 [2019-11-15 22:40:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:17,959 INFO L462 AbstractCegarLoop]: Abstraction has 6276 states and 7216 transitions. [2019-11-15 22:40:17,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-15 22:40:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 6276 states and 7216 transitions. [2019-11-15 22:40:17,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-15 22:40:17,963 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:17,963 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 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] [2019-11-15 22:40:18,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:18,164 INFO L410 AbstractCegarLoop]: === Iteration 63 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:18,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1998944351, now seen corresponding path program 24 times [2019-11-15 22:40:18,164 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:18,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253787258] [2019-11-15 22:40:18,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:18,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:18,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 278 proven. 401 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:18,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253787258] [2019-11-15 22:40:18,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695661641] [2019-11-15 22:40:18,850 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:19,413 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-15 22:40:19,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:40:19,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-15 22:40:19,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:19,446 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:19,446 INFO L375 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 25 [2019-11-15 22:40:19,447 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:19,469 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:40:19,470 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:19,470 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:40:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 276 proven. 403 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:20,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:20,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 67 [2019-11-15 22:40:20,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26496626] [2019-11-15 22:40:20,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-11-15 22:40:20,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:20,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-11-15 22:40:20,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=4050, Unknown=0, NotChecked=0, Total=4556 [2019-11-15 22:40:20,710 INFO L87 Difference]: Start difference. First operand 6276 states and 7216 transitions. Second operand 68 states. [2019-11-15 22:40:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:25,211 INFO L93 Difference]: Finished difference Result 7262 states and 8237 transitions. [2019-11-15 22:40:25,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-15 22:40:25,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 142 [2019-11-15 22:40:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:25,216 INFO L225 Difference]: With dead ends: 7262 [2019-11-15 22:40:25,216 INFO L226 Difference]: Without dead ends: 7262 [2019-11-15 22:40:25,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1017, Invalid=8295, Unknown=0, NotChecked=0, Total=9312 [2019-11-15 22:40:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7262 states. [2019-11-15 22:40:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7262 to 6371. [2019-11-15 22:40:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6371 states. [2019-11-15 22:40:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6371 states to 6371 states and 7329 transitions. [2019-11-15 22:40:25,277 INFO L78 Accepts]: Start accepts. Automaton has 6371 states and 7329 transitions. Word has length 142 [2019-11-15 22:40:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:25,277 INFO L462 AbstractCegarLoop]: Abstraction has 6371 states and 7329 transitions. [2019-11-15 22:40:25,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-11-15 22:40:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6371 states and 7329 transitions. [2019-11-15 22:40:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-15 22:40:25,282 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:25,282 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:40:25,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:25,483 INFO L410 AbstractCegarLoop]: === Iteration 64 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:25,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1820104646, now seen corresponding path program 20 times [2019-11-15 22:40:25,483 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:25,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584630818] [2019-11-15 22:40:25,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:25,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:25,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 201 proven. 410 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:40:25,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584630818] [2019-11-15 22:40:25,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520215113] [2019-11-15 22:40:25,973 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:26,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:40:26,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:40:26,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 106 conjunts are in the unsatisfiable core [2019-11-15 22:40:26,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:40:26,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:26,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 45 [2019-11-15 22:40:26,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461427697] [2019-11-15 22:40:26,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-15 22:40:26,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-15 22:40:26,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2019-11-15 22:40:26,812 INFO L87 Difference]: Start difference. First operand 6371 states and 7329 transitions. Second operand 46 states. [2019-11-15 22:40:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:29,106 INFO L93 Difference]: Finished difference Result 6907 states and 7934 transitions. [2019-11-15 22:40:29,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-15 22:40:29,106 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 146 [2019-11-15 22:40:29,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:29,110 INFO L225 Difference]: With dead ends: 6907 [2019-11-15 22:40:29,111 INFO L226 Difference]: Without dead ends: 6907 [2019-11-15 22:40:29,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=3346, Unknown=0, NotChecked=0, Total=3782 [2019-11-15 22:40:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6907 states. [2019-11-15 22:40:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6907 to 6868. [2019-11-15 22:40:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6868 states. [2019-11-15 22:40:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6868 states to 6868 states and 7906 transitions. [2019-11-15 22:40:29,167 INFO L78 Accepts]: Start accepts. Automaton has 6868 states and 7906 transitions. Word has length 146 [2019-11-15 22:40:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:29,167 INFO L462 AbstractCegarLoop]: Abstraction has 6868 states and 7906 transitions. [2019-11-15 22:40:29,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-15 22:40:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6868 states and 7906 transitions. [2019-11-15 22:40:29,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-15 22:40:29,173 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:29,173 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2019-11-15 22:40:29,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:29,377 INFO L410 AbstractCegarLoop]: === Iteration 65 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1588306822, now seen corresponding path program 25 times [2019-11-15 22:40:29,377 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:29,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379871613] [2019-11-15 22:40:29,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:29,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:29,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:30,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379871613] [2019-11-15 22:40:30,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556787661] [2019-11-15 22:40:30,160 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:30,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-15 22:40:30,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:31,002 INFO L375 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 14 treesize of output 10 [2019-11-15 22:40:31,002 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:31,007 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:31,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:40:31,008 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:40:31,265 INFO L375 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 [2019-11-15 22:40:31,265 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:31,266 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:31,266 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:31,266 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:40:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:31,295 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:31,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 37] total 60 [2019-11-15 22:40:31,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036560505] [2019-11-15 22:40:31,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-15 22:40:31,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-15 22:40:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3379, Unknown=0, NotChecked=0, Total=3540 [2019-11-15 22:40:31,296 INFO L87 Difference]: Start difference. First operand 6868 states and 7906 transitions. Second operand 60 states. [2019-11-15 22:40:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:38,060 INFO L93 Difference]: Finished difference Result 9353 states and 10628 transitions. [2019-11-15 22:40:38,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-15 22:40:38,060 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2019-11-15 22:40:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:38,066 INFO L225 Difference]: With dead ends: 9353 [2019-11-15 22:40:38,066 INFO L226 Difference]: Without dead ends: 8265 [2019-11-15 22:40:38,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=667, Invalid=11323, Unknown=0, NotChecked=0, Total=11990 [2019-11-15 22:40:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2019-11-15 22:40:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 7662. [2019-11-15 22:40:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7662 states. [2019-11-15 22:40:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7662 states to 7662 states and 8834 transitions. [2019-11-15 22:40:38,136 INFO L78 Accepts]: Start accepts. Automaton has 7662 states and 8834 transitions. Word has length 147 [2019-11-15 22:40:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:38,136 INFO L462 AbstractCegarLoop]: Abstraction has 7662 states and 8834 transitions. [2019-11-15 22:40:38,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-15 22:40:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7662 states and 8834 transitions. [2019-11-15 22:40:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-15 22:40:38,140 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:38,140 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 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] [2019-11-15 22:40:38,340 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:38,341 INFO L410 AbstractCegarLoop]: === Iteration 66 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1372139081, now seen corresponding path program 26 times [2019-11-15 22:40:38,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:38,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274617531] [2019-11-15 22:40:38,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:38,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:38,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 327 proven. 467 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:39,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274617531] [2019-11-15 22:40:39,212 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647675012] [2019-11-15 22:40:39,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:39,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:40:39,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:40:39,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 136 conjunts are in the unsatisfiable core [2019-11-15 22:40:39,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 325 proven. 469 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:40,111 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:40,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 57 [2019-11-15 22:40:40,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903228024] [2019-11-15 22:40:40,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-15 22:40:40,112 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-15 22:40:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2883, Unknown=0, NotChecked=0, Total=3306 [2019-11-15 22:40:40,113 INFO L87 Difference]: Start difference. First operand 7662 states and 8834 transitions. Second operand 58 states. [2019-11-15 22:40:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:44,413 INFO L93 Difference]: Finished difference Result 8778 states and 9987 transitions. [2019-11-15 22:40:44,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-15 22:40:44,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2019-11-15 22:40:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:44,418 INFO L225 Difference]: With dead ends: 8778 [2019-11-15 22:40:44,418 INFO L226 Difference]: Without dead ends: 8778 [2019-11-15 22:40:44,419 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=635, Invalid=5217, Unknown=0, NotChecked=0, Total=5852 [2019-11-15 22:40:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2019-11-15 22:40:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 7762. [2019-11-15 22:40:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7762 states. [2019-11-15 22:40:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7762 states to 7762 states and 8953 transitions. [2019-11-15 22:40:44,494 INFO L78 Accepts]: Start accepts. Automaton has 7762 states and 8953 transitions. Word has length 151 [2019-11-15 22:40:44,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:44,494 INFO L462 AbstractCegarLoop]: Abstraction has 7762 states and 8953 transitions. [2019-11-15 22:40:44,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-15 22:40:44,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7762 states and 8953 transitions. [2019-11-15 22:40:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-15 22:40:44,497 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:44,497 INFO L380 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:40:44,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:44,701 INFO L410 AbstractCegarLoop]: === Iteration 67 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1308606064, now seen corresponding path program 21 times [2019-11-15 22:40:44,701 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:44,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604934511] [2019-11-15 22:40:44,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:44,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:44,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:40:45,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604934511] [2019-11-15 22:40:45,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612597899] [2019-11-15 22:40:45,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:46,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-15 22:40:46,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:40:46,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 140 conjunts are in the unsatisfiable core [2019-11-15 22:40:46,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:46,020 INFO L375 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 [2019-11-15 22:40:46,021 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:46,026 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:46,026 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:46,027 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-15 22:40:46,626 INFO L375 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 14 treesize of output 10 [2019-11-15 22:40:46,627 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:46,640 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:46,640 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:40:46,640 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2019-11-15 22:40:46,701 INFO L375 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 24 treesize of output 23 [2019-11-15 22:40:46,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:46,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:46,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-15 22:40:46,711 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:33 [2019-11-15 22:40:47,737 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:40:47,738 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 10 [2019-11-15 22:40:47,738 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:47,744 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:47,744 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:47,744 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:36, output treesize:3 [2019-11-15 22:40:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:40:47,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:47,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 63 [2019-11-15 22:40:47,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216004737] [2019-11-15 22:40:47,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-15 22:40:47,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-15 22:40:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3746, Unknown=0, NotChecked=0, Total=3906 [2019-11-15 22:40:47,866 INFO L87 Difference]: Start difference. First operand 7762 states and 8953 transitions. Second operand 63 states. [2019-11-15 22:40:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:40:54,795 INFO L93 Difference]: Finished difference Result 13662 states and 15775 transitions. [2019-11-15 22:40:54,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-15 22:40:54,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 154 [2019-11-15 22:40:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:40:54,801 INFO L225 Difference]: With dead ends: 13662 [2019-11-15 22:40:54,801 INFO L226 Difference]: Without dead ends: 8608 [2019-11-15 22:40:54,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=369, Invalid=8003, Unknown=0, NotChecked=0, Total=8372 [2019-11-15 22:40:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2019-11-15 22:40:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 7908. [2019-11-15 22:40:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7908 states. [2019-11-15 22:40:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 9116 transitions. [2019-11-15 22:40:54,910 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 9116 transitions. Word has length 154 [2019-11-15 22:40:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:40:54,911 INFO L462 AbstractCegarLoop]: Abstraction has 7908 states and 9116 transitions. [2019-11-15 22:40:54,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-15 22:40:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 9116 transitions. [2019-11-15 22:40:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-15 22:40:54,914 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:40:54,914 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2019-11-15 22:40:55,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:55,114 INFO L410 AbstractCegarLoop]: === Iteration 68 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:40:55,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:40:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1570956766, now seen corresponding path program 27 times [2019-11-15 22:40:55,115 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:40:55,115 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630866010] [2019-11-15 22:40:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:55,115 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:40:55,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:40:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:40:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:55,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630866010] [2019-11-15 22:40:55,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240456966] [2019-11-15 22:40:55,998 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:40:56,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-15 22:40:56,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:40:56,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 169 conjunts are in the unsatisfiable core [2019-11-15 22:40:56,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:40:56,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:40:56,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:40:56,651 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-15 22:40:56,652 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:56,657 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:56,657 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:56,657 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-15 22:40:57,243 INFO L375 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 [2019-11-15 22:40:57,243 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:40:57,244 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:40:57,245 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:40:57,245 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-15 22:40:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:40:57,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:40:57,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40] total 57 [2019-11-15 22:40:57,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034524805] [2019-11-15 22:40:57,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-15 22:40:57,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:40:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-15 22:40:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3042, Unknown=0, NotChecked=0, Total=3192 [2019-11-15 22:40:57,294 INFO L87 Difference]: Start difference. First operand 7908 states and 9116 transitions. Second operand 57 states. [2019-11-15 22:41:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:41:03,560 INFO L93 Difference]: Finished difference Result 10718 states and 12196 transitions. [2019-11-15 22:41:03,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-11-15 22:41:03,561 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 156 [2019-11-15 22:41:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:41:03,567 INFO L225 Difference]: With dead ends: 10718 [2019-11-15 22:41:03,567 INFO L226 Difference]: Without dead ends: 9417 [2019-11-15 22:41:03,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 139 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=620, Invalid=11152, Unknown=0, NotChecked=0, Total=11772 [2019-11-15 22:41:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9417 states. [2019-11-15 22:41:03,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9417 to 8761. [2019-11-15 22:41:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8761 states. [2019-11-15 22:41:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 10114 transitions. [2019-11-15 22:41:03,636 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 10114 transitions. Word has length 156 [2019-11-15 22:41:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:41:03,636 INFO L462 AbstractCegarLoop]: Abstraction has 8761 states and 10114 transitions. [2019-11-15 22:41:03,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-15 22:41:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 10114 transitions. [2019-11-15 22:41:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-15 22:41:03,639 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:41:03,639 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:41:03,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:03,840 INFO L410 AbstractCegarLoop]: === Iteration 69 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:41:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:41:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash -508161619, now seen corresponding path program 22 times [2019-11-15 22:41:03,840 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:41:03,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684600309] [2019-11-15 22:41:03,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:03,841 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:03,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:41:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 243 proven. 495 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:41:04,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684600309] [2019-11-15 22:41:04,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520481239] [2019-11-15 22:41:04,500 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:04,781 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:41:04,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:41:04,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 112 conjunts are in the unsatisfiable core [2019-11-15 22:41:04,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:41:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:41:05,216 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:41:05,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 47 [2019-11-15 22:41:05,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026540628] [2019-11-15 22:41:05,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-15 22:41:05,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:41:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-15 22:41:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1936, Unknown=0, NotChecked=0, Total=2256 [2019-11-15 22:41:05,217 INFO L87 Difference]: Start difference. First operand 8761 states and 10114 transitions. Second operand 48 states. [2019-11-15 22:41:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:41:07,918 INFO L93 Difference]: Finished difference Result 9448 states and 10895 transitions. [2019-11-15 22:41:07,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-15 22:41:07,918 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 158 [2019-11-15 22:41:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:41:07,924 INFO L225 Difference]: With dead ends: 9448 [2019-11-15 22:41:07,924 INFO L226 Difference]: Without dead ends: 9448 [2019-11-15 22:41:07,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=456, Invalid=3576, Unknown=0, NotChecked=0, Total=4032 [2019-11-15 22:41:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9448 states. [2019-11-15 22:41:07,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9448 to 9404. [2019-11-15 22:41:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9404 states. [2019-11-15 22:41:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9404 states to 9404 states and 10863 transitions. [2019-11-15 22:41:07,988 INFO L78 Accepts]: Start accepts. Automaton has 9404 states and 10863 transitions. Word has length 158 [2019-11-15 22:41:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:41:07,989 INFO L462 AbstractCegarLoop]: Abstraction has 9404 states and 10863 transitions. [2019-11-15 22:41:07,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-15 22:41:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 9404 states and 10863 transitions. [2019-11-15 22:41:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-15 22:41:07,992 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:41:07,992 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 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] [2019-11-15 22:41:08,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:08,192 INFO L410 AbstractCegarLoop]: === Iteration 70 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:41:08,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:41:08,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1175570043, now seen corresponding path program 28 times [2019-11-15 22:41:08,193 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:41:08,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516912108] [2019-11-15 22:41:08,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:08,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:08,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:41:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:09,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 380 proven. 538 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:09,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516912108] [2019-11-15 22:41:09,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165668415] [2019-11-15 22:41:09,249 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:09,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 22:41:09,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:41:09,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 142 conjunts are in the unsatisfiable core [2019-11-15 22:41:09,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:41:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 392 proven. 526 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:10,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:41:10,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 36] total 59 [2019-11-15 22:41:10,213 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525069471] [2019-11-15 22:41:10,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-15 22:41:10,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:41:10,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-15 22:41:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2019-11-15 22:41:10,215 INFO L87 Difference]: Start difference. First operand 9404 states and 10863 transitions. Second operand 60 states. [2019-11-15 22:41:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:41:14,597 INFO L93 Difference]: Finished difference Result 10721 states and 12221 transitions. [2019-11-15 22:41:14,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-15 22:41:14,598 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 160 [2019-11-15 22:41:14,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:41:14,605 INFO L225 Difference]: With dead ends: 10721 [2019-11-15 22:41:14,605 INFO L226 Difference]: Without dead ends: 10721 [2019-11-15 22:41:14,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=693, Invalid=5627, Unknown=0, NotChecked=0, Total=6320 [2019-11-15 22:41:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10721 states. [2019-11-15 22:41:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10721 to 9514. [2019-11-15 22:41:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9514 states. [2019-11-15 22:41:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9514 states to 9514 states and 10994 transitions. [2019-11-15 22:41:14,688 INFO L78 Accepts]: Start accepts. Automaton has 9514 states and 10994 transitions. Word has length 160 [2019-11-15 22:41:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:41:14,688 INFO L462 AbstractCegarLoop]: Abstraction has 9514 states and 10994 transitions. [2019-11-15 22:41:14,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-15 22:41:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 9514 states and 10994 transitions. [2019-11-15 22:41:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-15 22:41:14,693 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:41:14,693 INFO L380 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2019-11-15 22:41:14,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:14,894 INFO L410 AbstractCegarLoop]: === Iteration 71 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:41:14,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:41:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1941201684, now seen corresponding path program 29 times [2019-11-15 22:41:14,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:41:14,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032012509] [2019-11-15 22:41:14,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:14,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:14,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:41:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 44 proven. 946 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:15,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032012509] [2019-11-15 22:41:15,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021509630] [2019-11-15 22:41:15,900 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:16,309 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-15 22:41:16,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:41:16,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 167 conjunts are in the unsatisfiable core [2019-11-15 22:41:16,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:41:17,034 INFO L375 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 14 treesize of output 10 [2019-11-15 22:41:17,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:17,039 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:17,040 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:41:17,040 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:41:17,334 INFO L375 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 [2019-11-15 22:41:17,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:17,336 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:17,336 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:41:17,336 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:41:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 44 proven. 946 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:17,373 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:41:17,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 41] total 66 [2019-11-15 22:41:17,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585251266] [2019-11-15 22:41:17,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-15 22:41:17,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:41:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-15 22:41:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4113, Unknown=0, NotChecked=0, Total=4290 [2019-11-15 22:41:17,375 INFO L87 Difference]: Start difference. First operand 9514 states and 10994 transitions. Second operand 66 states. [2019-11-15 22:41:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:41:26,179 INFO L93 Difference]: Finished difference Result 12642 states and 14426 transitions. [2019-11-15 22:41:26,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-11-15 22:41:26,179 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 165 [2019-11-15 22:41:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:41:26,189 INFO L225 Difference]: With dead ends: 12642 [2019-11-15 22:41:26,189 INFO L226 Difference]: Without dead ends: 11255 [2019-11-15 22:41:26,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=743, Invalid=14019, Unknown=0, NotChecked=0, Total=14762 [2019-11-15 22:41:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2019-11-15 22:41:26,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 10500. [2019-11-15 22:41:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10500 states. [2019-11-15 22:41:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 12150 transitions. [2019-11-15 22:41:26,269 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 12150 transitions. Word has length 165 [2019-11-15 22:41:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:41:26,270 INFO L462 AbstractCegarLoop]: Abstraction has 10500 states and 12150 transitions. [2019-11-15 22:41:26,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-15 22:41:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 12150 transitions. [2019-11-15 22:41:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-15 22:41:26,273 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:41:26,274 INFO L380 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:41:26,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:26,479 INFO L410 AbstractCegarLoop]: === Iteration 72 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:41:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:41:26,479 INFO L82 PathProgramCache]: Analyzing trace with hash 7398519, now seen corresponding path program 23 times [2019-11-15 22:41:26,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:41:26,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510791096] [2019-11-15 22:41:26,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:26,480 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:26,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:41:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:41:27,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510791096] [2019-11-15 22:41:27,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28704609] [2019-11-15 22:41:27,370 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:27,736 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-15 22:41:27,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:41:27,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-15 22:41:27,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:41:27,787 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:27,787 INFO L375 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 25 [2019-11-15 22:41:27,787 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:27,803 INFO L567 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2019-11-15 22:41:27,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:41:27,804 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:21 [2019-11-15 22:41:28,742 INFO L375 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 [2019-11-15 22:41:28,742 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:28,751 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:28,751 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:41:28,751 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-11-15 22:41:28,822 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:41:28,823 INFO L375 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 [2019-11-15 22:41:28,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:28,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:28,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:41:28,843 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2019-11-15 22:41:30,465 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:41:30,470 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:30,470 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 34 treesize of output 25 [2019-11-15 22:41:30,470 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:41:30,480 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:30,480 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:41:30,480 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:32 [2019-11-15 22:41:30,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:41:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 200 proven. 628 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:41:31,073 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:41:31,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39] total 74 [2019-11-15 22:41:31,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141046353] [2019-11-15 22:41:31,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-11-15 22:41:31,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:41:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-11-15 22:41:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5166, Unknown=0, NotChecked=0, Total=5402 [2019-11-15 22:41:31,074 INFO L87 Difference]: Start difference. First operand 10500 states and 12150 transitions. Second operand 74 states. [2019-11-15 22:41:40,013 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-15 22:41:47,060 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-15 22:41:47,340 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2019-11-15 22:41:47,652 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2019-11-15 22:41:48,326 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2019-11-15 22:41:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:41:49,386 INFO L93 Difference]: Finished difference Result 18920 states and 21891 transitions. [2019-11-15 22:41:49,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-11-15 22:41:49,387 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 166 [2019-11-15 22:41:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:41:49,394 INFO L225 Difference]: With dead ends: 18920 [2019-11-15 22:41:49,394 INFO L226 Difference]: Without dead ends: 11599 [2019-11-15 22:41:49,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7087 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1224, Invalid=29226, Unknown=0, NotChecked=0, Total=30450 [2019-11-15 22:41:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11599 states. [2019-11-15 22:41:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11599 to 10671. [2019-11-15 22:41:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10671 states. [2019-11-15 22:41:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10671 states to 10671 states and 12339 transitions. [2019-11-15 22:41:49,514 INFO L78 Accepts]: Start accepts. Automaton has 10671 states and 12339 transitions. Word has length 166 [2019-11-15 22:41:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:41:49,514 INFO L462 AbstractCegarLoop]: Abstraction has 10671 states and 12339 transitions. [2019-11-15 22:41:49,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-11-15 22:41:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10671 states and 12339 transitions. [2019-11-15 22:41:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-15 22:41:49,521 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:41:49,521 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 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] [2019-11-15 22:41:49,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:49,727 INFO L410 AbstractCegarLoop]: === Iteration 73 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:41:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:41:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1403198703, now seen corresponding path program 30 times [2019-11-15 22:41:49,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:41:49,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171013329] [2019-11-15 22:41:49,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:49,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:41:49,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:41:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:41:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 437 proven. 614 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:50,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171013329] [2019-11-15 22:41:50,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190006260] [2019-11-15 22:41:50,673 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:41:51,787 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-15 22:41:51,787 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:41:51,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 128 conjunts are in the unsatisfiable core [2019-11-15 22:41:51,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:41:51,821 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:41:51,822 INFO L375 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 25 [2019-11-15 22:41:51,822 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:41:51,838 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:41:51,838 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:41:51,839 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:41:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 435 proven. 616 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:41:53,497 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:41:53,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39] total 79 [2019-11-15 22:41:53,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834848610] [2019-11-15 22:41:53,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-11-15 22:41:53,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:41:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-11-15 22:41:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=5610, Unknown=0, NotChecked=0, Total=6320 [2019-11-15 22:41:53,498 INFO L87 Difference]: Start difference. First operand 10671 states and 12339 transitions. Second operand 80 states. [2019-11-15 22:42:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:00,117 INFO L93 Difference]: Finished difference Result 12138 states and 13849 transitions. [2019-11-15 22:42:00,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-15 22:42:00,118 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 169 [2019-11-15 22:42:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:00,126 INFO L225 Difference]: With dead ends: 12138 [2019-11-15 22:42:00,126 INFO L226 Difference]: Without dead ends: 12138 [2019-11-15 22:42:00,126 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3866 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1383, Invalid=11727, Unknown=0, NotChecked=0, Total=13110 [2019-11-15 22:42:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12138 states. [2019-11-15 22:42:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12138 to 10786. [2019-11-15 22:42:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10786 states. [2019-11-15 22:42:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10786 states to 10786 states and 12476 transitions. [2019-11-15 22:42:00,287 INFO L78 Accepts]: Start accepts. Automaton has 10786 states and 12476 transitions. Word has length 169 [2019-11-15 22:42:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:00,287 INFO L462 AbstractCegarLoop]: Abstraction has 10786 states and 12476 transitions. [2019-11-15 22:42:00,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-11-15 22:42:00,287 INFO L276 IsEmpty]: Start isEmpty. Operand 10786 states and 12476 transitions. [2019-11-15 22:42:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-15 22:42:00,295 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:00,295 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:42:00,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:00,501 INFO L410 AbstractCegarLoop]: === Iteration 74 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:00,502 INFO L82 PathProgramCache]: Analyzing trace with hash -528625514, now seen corresponding path program 1 times [2019-11-15 22:42:00,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:00,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511997766] [2019-11-15 22:42:00,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:00,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:00,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 289 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:01,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511997766] [2019-11-15 22:42:01,294 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068060960] [2019-11-15 22:42:01,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:01,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 121 conjunts are in the unsatisfiable core [2019-11-15 22:42:01,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 288 proven. 589 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:02,095 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:02,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 50 [2019-11-15 22:42:02,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952187277] [2019-11-15 22:42:02,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-15 22:42:02,096 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:02,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-15 22:42:02,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=2186, Unknown=0, NotChecked=0, Total=2550 [2019-11-15 22:42:02,096 INFO L87 Difference]: Start difference. First operand 10786 states and 12476 transitions. Second operand 51 states. [2019-11-15 22:42:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:04,991 INFO L93 Difference]: Finished difference Result 11654 states and 13453 transitions. [2019-11-15 22:42:04,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-15 22:42:04,991 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 170 [2019-11-15 22:42:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:04,999 INFO L225 Difference]: With dead ends: 11654 [2019-11-15 22:42:04,999 INFO L226 Difference]: Without dead ends: 11654 [2019-11-15 22:42:04,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=4047, Unknown=0, NotChecked=0, Total=4556 [2019-11-15 22:42:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11654 states. [2019-11-15 22:42:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11654 to 11505. [2019-11-15 22:42:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11505 states. [2019-11-15 22:42:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11505 states to 11505 states and 13317 transitions. [2019-11-15 22:42:05,084 INFO L78 Accepts]: Start accepts. Automaton has 11505 states and 13317 transitions. Word has length 170 [2019-11-15 22:42:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:05,084 INFO L462 AbstractCegarLoop]: Abstraction has 11505 states and 13317 transitions. [2019-11-15 22:42:05,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-15 22:42:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 11505 states and 13317 transitions. [2019-11-15 22:42:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-15 22:42:05,088 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:05,089 INFO L380 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2019-11-15 22:42:05,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:05,292 INFO L410 AbstractCegarLoop]: === Iteration 75 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -669896968, now seen corresponding path program 31 times [2019-11-15 22:42:05,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:05,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808151970] [2019-11-15 22:42:05,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:05,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:05,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 47 proven. 1081 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:42:06,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808151970] [2019-11-15 22:42:06,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887458130] [2019-11-15 22:42:06,383 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:06,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 177 conjunts are in the unsatisfiable core [2019-11-15 22:42:06,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:07,384 INFO L375 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 14 treesize of output 10 [2019-11-15 22:42:07,384 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:07,389 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:07,389 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:42:07,390 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-11-15 22:42:07,684 INFO L375 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 [2019-11-15 22:42:07,684 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:07,685 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:07,685 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:07,686 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 22:42:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 47 proven. 1081 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:42:07,726 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:07,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 43] total 69 [2019-11-15 22:42:07,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500036337] [2019-11-15 22:42:07,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-15 22:42:07,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-15 22:42:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4507, Unknown=0, NotChecked=0, Total=4692 [2019-11-15 22:42:07,727 INFO L87 Difference]: Start difference. First operand 11505 states and 13317 transitions. Second operand 69 states. [2019-11-15 22:42:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:19,847 INFO L93 Difference]: Finished difference Result 15137 states and 17305 transitions. [2019-11-15 22:42:19,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-11-15 22:42:19,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 174 [2019-11-15 22:42:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:19,857 INFO L225 Difference]: With dead ends: 15137 [2019-11-15 22:42:19,857 INFO L226 Difference]: Without dead ends: 13510 [2019-11-15 22:42:19,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3802 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=781, Invalid=15475, Unknown=0, NotChecked=0, Total=16256 [2019-11-15 22:42:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13510 states. [2019-11-15 22:42:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13510 to 12638. [2019-11-15 22:42:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12638 states. [2019-11-15 22:42:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12638 states to 12638 states and 14647 transitions. [2019-11-15 22:42:19,950 INFO L78 Accepts]: Start accepts. Automaton has 12638 states and 14647 transitions. Word has length 174 [2019-11-15 22:42:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:19,950 INFO L462 AbstractCegarLoop]: Abstraction has 12638 states and 14647 transitions. [2019-11-15 22:42:19,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-15 22:42:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 12638 states and 14647 transitions. [2019-11-15 22:42:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-15 22:42:19,954 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:19,954 INFO L380 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:42:20,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:20,156 INFO L410 AbstractCegarLoop]: === Iteration 76 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:20,156 INFO L82 PathProgramCache]: Analyzing trace with hash -566563618, now seen corresponding path program 24 times [2019-11-15 22:42:20,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:20,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700202367] [2019-11-15 22:42:20,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:20,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:20,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 74 proven. 901 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:21,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700202367] [2019-11-15 22:42:21,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209941669] [2019-11-15 22:42:21,291 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:21,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-15 22:42:21,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:42:21,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 156 conjunts are in the unsatisfiable core [2019-11-15 22:42:21,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:21,889 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:21,889 INFO L375 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 25 [2019-11-15 22:42:21,890 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:21,909 INFO L567 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2019-11-15 22:42:21,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:21,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2019-11-15 22:42:22,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:22,894 INFO L375 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 35 treesize of output 31 [2019-11-15 22:42:22,894 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:22,898 INFO L375 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 38 treesize of output 34 [2019-11-15 22:42:22,899 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:22,924 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:22,924 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-15 22:42:22,924 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:66 [2019-11-15 22:42:23,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:23,060 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:23,060 INFO L375 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 69 [2019-11-15 22:42:23,060 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:23,106 INFO L567 ElimStorePlain]: treesize reduction 33, result has 70.0 percent of original size [2019-11-15 22:42:23,109 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:42:23,112 INFO L375 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 43 treesize of output 42 [2019-11-15 22:42:23,113 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:23,130 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:23,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-15 22:42:23,131 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:81, output treesize:73 [2019-11-15 22:42:25,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:25,653 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:25,653 INFO L375 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 56 treesize of output 52 [2019-11-15 22:42:25,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:25,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:25,655 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:42:25,659 INFO L375 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 50 treesize of output 44 [2019-11-15 22:42:25,660 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:42:25,726 INFO L567 ElimStorePlain]: treesize reduction 13, result has 86.6 percent of original size [2019-11-15 22:42:25,731 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:42:25,731 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:42:25,732 INFO L375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 24 [2019-11-15 22:42:25,732 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:25,736 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:42:25,736 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 48 treesize of output 31 [2019-11-15 22:42:25,737 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:25,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:25,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:25,761 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:107, output treesize:3 [2019-11-15 22:42:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 74 proven. 901 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:26,045 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:26,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 72 [2019-11-15 22:42:26,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003795919] [2019-11-15 22:42:26,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-15 22:42:26,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:26,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-15 22:42:26,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4935, Unknown=0, NotChecked=0, Total=5112 [2019-11-15 22:42:26,047 INFO L87 Difference]: Start difference. First operand 12638 states and 14647 transitions. Second operand 72 states. [2019-11-15 22:42:40,654 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-11-15 22:42:41,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:41,737 INFO L93 Difference]: Finished difference Result 22751 states and 26393 transitions. [2019-11-15 22:42:41,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-11-15 22:42:41,738 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 178 [2019-11-15 22:42:41,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:41,746 INFO L225 Difference]: With dead ends: 22751 [2019-11-15 22:42:41,746 INFO L226 Difference]: Without dead ends: 13773 [2019-11-15 22:42:41,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5687 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=747, Invalid=22205, Unknown=0, NotChecked=0, Total=22952 [2019-11-15 22:42:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13773 states. [2019-11-15 22:42:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13773 to 12806. [2019-11-15 22:42:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12806 states. [2019-11-15 22:42:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12806 states to 12806 states and 14834 transitions. [2019-11-15 22:42:41,834 INFO L78 Accepts]: Start accepts. Automaton has 12806 states and 14834 transitions. Word has length 178 [2019-11-15 22:42:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:41,835 INFO L462 AbstractCegarLoop]: Abstraction has 12806 states and 14834 transitions. [2019-11-15 22:42:41,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-15 22:42:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 12806 states and 14834 transitions. [2019-11-15 22:42:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-15 22:42:41,838 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:41,838 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 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] [2019-11-15 22:42:42,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:42,039 INFO L410 AbstractCegarLoop]: === Iteration 77 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:42,040 INFO L82 PathProgramCache]: Analyzing trace with hash -133758379, now seen corresponding path program 32 times [2019-11-15 22:42:42,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:42,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536994846] [2019-11-15 22:42:42,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:42,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:42,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 498 proven. 695 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:42:43,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536994846] [2019-11-15 22:42:43,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984712224] [2019-11-15 22:42:43,015 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:43,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:42:43,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:42:43,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 163 conjunts are in the unsatisfiable core [2019-11-15 22:42:43,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 496 proven. 697 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:42:44,145 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:44,146 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41] total 66 [2019-11-15 22:42:44,146 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411214413] [2019-11-15 22:42:44,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-15 22:42:44,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-15 22:42:44,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=3840, Unknown=0, NotChecked=0, Total=4422 [2019-11-15 22:42:44,147 INFO L87 Difference]: Start difference. First operand 12806 states and 14834 transitions. Second operand 67 states. [2019-11-15 22:42:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:48,827 INFO L93 Difference]: Finished difference Result 14502 states and 16577 transitions. [2019-11-15 22:42:48,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-15 22:42:48,828 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 178 [2019-11-15 22:42:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:48,838 INFO L225 Difference]: With dead ends: 14502 [2019-11-15 22:42:48,838 INFO L226 Difference]: Without dead ends: 14502 [2019-11-15 22:42:48,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=830, Invalid=7002, Unknown=0, NotChecked=0, Total=7832 [2019-11-15 22:42:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14502 states. [2019-11-15 22:42:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14502 to 12931. [2019-11-15 22:42:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12931 states. [2019-11-15 22:42:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12931 states to 12931 states and 14983 transitions. [2019-11-15 22:42:48,954 INFO L78 Accepts]: Start accepts. Automaton has 12931 states and 14983 transitions. Word has length 178 [2019-11-15 22:42:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:48,954 INFO L462 AbstractCegarLoop]: Abstraction has 12931 states and 14983 transitions. [2019-11-15 22:42:48,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-15 22:42:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 12931 states and 14983 transitions. [2019-11-15 22:42:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-15 22:42:48,959 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:48,960 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:42:49,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:49,161 INFO L410 AbstractCegarLoop]: === Iteration 78 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:49,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:49,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1225165317, now seen corresponding path program 25 times [2019-11-15 22:42:49,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:49,162 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610633043] [2019-11-15 22:42:49,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:49,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:49,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 339 proven. 689 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:49,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610633043] [2019-11-15 22:42:49,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903132086] [2019-11-15 22:42:49,880 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:50,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 130 conjunts are in the unsatisfiable core [2019-11-15 22:42:50,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 338 proven. 690 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:42:50,759 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:50,759 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 53 [2019-11-15 22:42:50,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777622293] [2019-11-15 22:42:50,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-15 22:42:50,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:50,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-15 22:42:50,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2019-11-15 22:42:50,760 INFO L87 Difference]: Start difference. First operand 12931 states and 14983 transitions. Second operand 54 states. [2019-11-15 22:42:54,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:42:54,028 INFO L93 Difference]: Finished difference Result 13800 states and 15976 transitions. [2019-11-15 22:42:54,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-15 22:42:54,028 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 182 [2019-11-15 22:42:54,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:42:54,036 INFO L225 Difference]: With dead ends: 13800 [2019-11-15 22:42:54,036 INFO L226 Difference]: Without dead ends: 13800 [2019-11-15 22:42:54,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=565, Invalid=4547, Unknown=0, NotChecked=0, Total=5112 [2019-11-15 22:42:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13800 states. [2019-11-15 22:42:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13800 to 13750. [2019-11-15 22:42:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13750 states. [2019-11-15 22:42:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13750 states to 13750 states and 15940 transitions. [2019-11-15 22:42:54,130 INFO L78 Accepts]: Start accepts. Automaton has 13750 states and 15940 transitions. Word has length 182 [2019-11-15 22:42:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:42:54,130 INFO L462 AbstractCegarLoop]: Abstraction has 13750 states and 15940 transitions. [2019-11-15 22:42:54,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-15 22:42:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13750 states and 15940 transitions. [2019-11-15 22:42:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-15 22:42:54,135 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:42:54,135 INFO L380 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2019-11-15 22:42:54,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:54,336 INFO L410 AbstractCegarLoop]: === Iteration 79 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:42:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:42:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash -312231598, now seen corresponding path program 33 times [2019-11-15 22:42:54,336 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:42:54,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923655863] [2019-11-15 22:42:54,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:54,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:42:54,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:42:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:42:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 50 proven. 1225 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-15 22:42:55,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923655863] [2019-11-15 22:42:55,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329226406] [2019-11-15 22:42:55,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:42:56,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-15 22:42:56,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:42:56,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 96 conjunts are in the unsatisfiable core [2019-11-15 22:42:56,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:42:56,144 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:56,144 INFO L375 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 25 [2019-11-15 22:42:56,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:56,158 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-15 22:42:56,158 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:56,159 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-15 22:42:56,210 INFO L375 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 [2019-11-15 22:42:56,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:42:56,212 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:56,212 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:56,212 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 22:42:56,445 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:56,445 INFO L375 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 21 treesize of output 21 [2019-11-15 22:42:56,446 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:42:56,452 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:42:56,453 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:42:56,453 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2019-11-15 22:42:56,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:42:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 16 proven. 82 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2019-11-15 22:42:56,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:42:56,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 11] total 58 [2019-11-15 22:42:56,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125883771] [2019-11-15 22:42:56,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-15 22:42:56,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:42:56,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-15 22:42:56,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3164, Unknown=0, NotChecked=0, Total=3306 [2019-11-15 22:42:56,729 INFO L87 Difference]: Start difference. First operand 13750 states and 15940 transitions. Second operand 58 states. [2019-11-15 22:43:03,051 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2019-11-15 22:43:03,943 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2019-11-15 22:43:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:43:14,022 INFO L93 Difference]: Finished difference Result 17882 states and 20459 transitions. [2019-11-15 22:43:14,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2019-11-15 22:43:14,023 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 183 [2019-11-15 22:43:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:43:14,033 INFO L225 Difference]: With dead ends: 17882 [2019-11-15 22:43:14,033 INFO L226 Difference]: Without dead ends: 13892 [2019-11-15 22:43:14,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14885 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2518, Invalid=43922, Unknown=0, NotChecked=0, Total=46440 [2019-11-15 22:43:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2019-11-15 22:43:14,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 11863. [2019-11-15 22:43:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11863 states. [2019-11-15 22:43:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11863 states to 11863 states and 13819 transitions. [2019-11-15 22:43:14,123 INFO L78 Accepts]: Start accepts. Automaton has 11863 states and 13819 transitions. Word has length 183 [2019-11-15 22:43:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:43:14,123 INFO L462 AbstractCegarLoop]: Abstraction has 11863 states and 13819 transitions. [2019-11-15 22:43:14,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-15 22:43:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 11863 states and 13819 transitions. [2019-11-15 22:43:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-15 22:43:14,127 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:43:14,127 INFO L380 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:43:14,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:43:14,333 INFO L410 AbstractCegarLoop]: === Iteration 80 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:43:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:43:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash -890627387, now seen corresponding path program 26 times [2019-11-15 22:43:14,334 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:43:14,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025685451] [2019-11-15 22:43:14,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:43:14,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:43:14,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:43:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:43:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:43:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 80 proven. 1054 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:43:15,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025685451] [2019-11-15 22:43:15,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925533782] [2019-11-15 22:43:15,511 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:43:15,876 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 22:43:15,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:43:15,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 160 conjunts are in the unsatisfiable core [2019-11-15 22:43:15,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:43:15,886 INFO L375 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 [2019-11-15 22:43:15,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:15,890 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:15,890 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:43:15,891 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-15 22:43:16,661 INFO L375 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 14 treesize of output 10 [2019-11-15 22:43:16,661 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:16,668 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:16,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-15 22:43:16,668 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-11-15 22:43:16,735 INFO L375 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 25 treesize of output 24 [2019-11-15 22:43:16,736 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:16,744 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:16,745 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-15 22:43:16,745 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2019-11-15 22:43:18,512 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-15 22:43:18,512 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 10 [2019-11-15 22:43:18,513 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:18,522 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:18,523 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:43:18,523 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:49, output treesize:3 [2019-11-15 22:43:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 80 proven. 1054 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:43:18,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:43:18,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 76 [2019-11-15 22:43:18,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925482764] [2019-11-15 22:43:18,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-11-15 22:43:18,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:43:18,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-11-15 22:43:18,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=5516, Unknown=0, NotChecked=0, Total=5700 [2019-11-15 22:43:18,801 INFO L87 Difference]: Start difference. First operand 11863 states and 13819 transitions. Second operand 76 states. [2019-11-15 22:43:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:43:28,719 INFO L93 Difference]: Finished difference Result 22826 states and 26565 transitions. [2019-11-15 22:43:28,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-15 22:43:28,720 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 190 [2019-11-15 22:43:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:43:28,726 INFO L225 Difference]: With dead ends: 22826 [2019-11-15 22:43:28,727 INFO L226 Difference]: Without dead ends: 11877 [2019-11-15 22:43:28,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=454, Invalid=12428, Unknown=0, NotChecked=0, Total=12882 [2019-11-15 22:43:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11877 states. [2019-11-15 22:43:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11877 to 11871. [2019-11-15 22:43:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11871 states. [2019-11-15 22:43:28,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11871 states to 11871 states and 13827 transitions. [2019-11-15 22:43:28,810 INFO L78 Accepts]: Start accepts. Automaton has 11871 states and 13827 transitions. Word has length 190 [2019-11-15 22:43:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:43:28,810 INFO L462 AbstractCegarLoop]: Abstraction has 11871 states and 13827 transitions. [2019-11-15 22:43:28,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-11-15 22:43:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 11871 states and 13827 transitions. [2019-11-15 22:43:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-15 22:43:28,814 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 22:43:28,814 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 22:43:29,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:43:29,015 INFO L410 AbstractCegarLoop]: === Iteration 81 === [cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION]=== [2019-11-15 22:43:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 22:43:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1711611806, now seen corresponding path program 27 times [2019-11-15 22:43:29,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 22:43:29,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670008937] [2019-11-15 22:43:29,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:43:29,016 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 22:43:29,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 22:43:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:43:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 22:43:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 393 proven. 798 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 22:43:29,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670008937] [2019-11-15 22:43:29,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412327938] [2019-11-15 22:43:29,768 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:43:30,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-15 22:43:30,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 22:43:30,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-15 22:43:30,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 22:43:30,486 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_40|]} [2019-11-15 22:43:30,489 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 22:43:30,490 INFO L375 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 [2019-11-15 22:43:30,490 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,496 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,499 INFO L375 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 [2019-11-15 22:43:30,499 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,505 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,505 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,505 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:18 [2019-11-15 22:43:30,549 INFO L375 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 [2019-11-15 22:43:30,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,554 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,554 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,554 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-15 22:43:30,595 INFO L375 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 28 treesize of output 27 [2019-11-15 22:43:30,595 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,600 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-15 22:43:30,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:28 [2019-11-15 22:43:30,901 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,901 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 24 [2019-11-15 22:43:30,901 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-15 22:43:30,909 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 22:43:30,910 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 22:43:30,910 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:23 [2019-11-15 22:43:31,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 22:43:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 13 proven. 106 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-11-15 22:43:31,255 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 22:43:31,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 11] total 47 [2019-11-15 22:43:31,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910197830] [2019-11-15 22:43:31,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-15 22:43:31,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 22:43:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-15 22:43:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1991, Unknown=0, NotChecked=0, Total=2256 [2019-11-15 22:43:31,256 INFO L87 Difference]: Start difference. First operand 11871 states and 13827 transitions. Second operand 48 states. [2019-11-15 22:43:34,648 WARN L191 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2019-11-15 22:43:36,985 WARN L191 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-11-15 22:43:39,713 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-15 22:43:42,141 WARN L191 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-15 22:43:45,090 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-15 22:43:47,337 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-15 22:43:49,703 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-15 22:43:52,241 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2019-11-15 22:43:52,419 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-15 22:43:53,207 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-15 22:43:53,610 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-15 22:43:57,985 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-15 22:44:02,160 WARN L191 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2019-11-15 22:44:04,449 WARN L191 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2019-11-15 22:44:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 22:44:04,529 INFO L93 Difference]: Finished difference Result 11906 states and 13845 transitions. [2019-11-15 22:44:04,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-15 22:44:04,529 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 194 [2019-11-15 22:44:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 22:44:04,530 INFO L225 Difference]: With dead ends: 11906 [2019-11-15 22:44:04,530 INFO L226 Difference]: Without dead ends: 0 [2019-11-15 22:44:04,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=1059, Invalid=8642, Unknown=1, NotChecked=0, Total=9702 [2019-11-15 22:44:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-15 22:44:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-15 22:44:04,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-15 22:44:04,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-15 22:44:04,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 194 [2019-11-15 22:44:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 22:44:04,531 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-15 22:44:04,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-15 22:44:04,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-15 22:44:04,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-15 22:44:04,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 22:44:04,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 10:44:04 BoogieIcfgContainer [2019-11-15 22:44:04,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 22:44:04,736 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 22:44:04,736 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 22:44:04,736 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 22:44:04,737 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 10:31:33" (3/4) ... [2019-11-15 22:44:04,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-15 22:44:04,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-15 22:44:04,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2019-11-15 22:44:04,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-11-15 22:44:04,745 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-11-15 22:44:04,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-11-15 22:44:04,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-11-15 22:44:04,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-15 22:44:04,746 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-11-15 22:44:04,751 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2019-11-15 22:44:04,751 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2019-11-15 22:44:04,751 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-15 22:44:04,788 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f6b0ecf4-d6ac-4ff5-8e52-03609692840e/bin/uautomizer/witness.graphml [2019-11-15 22:44:04,788 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 22:44:04,789 INFO L168 Benchmark]: Toolchain (without parser) took 752462.54 ms. Allocated memory was 1.0 GB in the beginning and 2.0 GB in the end (delta: 970.5 MB). Free memory was 944.7 MB in the beginning and 1.7 GB in the end (delta: -734.3 MB). Peak memory consumption was 236.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,790 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 22:44:04,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,791 INFO L168 Benchmark]: Boogie Preprocessor took 70.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,791 INFO L168 Benchmark]: RCFGBuilder took 685.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,792 INFO L168 Benchmark]: TraceAbstraction took 750902.92 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 816.8 MB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -625.9 MB). Peak memory consumption was 191.0 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,792 INFO L168 Benchmark]: Witness Printer took 52.68 ms. Allocated memory is still 2.0 GB. Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2019-11-15 22:44:04,794 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 745.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -191.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 70.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 685.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 750902.92 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 816.8 MB). Free memory was 1.1 GB in the beginning and 1.7 GB in the end (delta: -625.9 MB). Peak memory consumption was 191.0 MB. Max. memory is 11.5 GB. * Witness Printer took 52.68 ms. Allocated memory is still 2.0 GB. Free memory was 1.7 GB in the beginning and 1.7 GB in the end (delta: 28.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: 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: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 67 locations, 13 error locations. Result: SAFE, OverallTime: 750.8s, OverallIterations: 81, TraceHistogramMax: 18, AutomataDifference: 611.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 6947 SDtfs, 22244 SDslu, 61522 SDs, 0 SdLazy, 282761 SolverSat, 2846 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 159.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10756 GetRequests, 6090 SyntacticMatches, 85 SemanticMatches, 4581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101148 ImplicationChecksByTransitivity, 511.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13750occurred in iteration=78, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 81 MinimizatonAttempts, 21592 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 97.9s InterpolantComputationTime, 14348 NumberOfCodeBlocks, 14246 NumberOfCodeBlocksAsserted, 418 NumberOfCheckSat, 14197 ConstructedInterpolants, 1024 QuantifiedInterpolants, 20933262 SizeOfPredicates, 1521 NumberOfNonLiveVariables, 27821 ConjunctsInSsa, 5745 ConjunctsInUnsatCore, 151 InterpolantComputations, 16 PerfectInterpolantSequences, 14322/54274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...