./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 276936ba1494f32a328b3de86f664a380d5263e9 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:18:06,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:18:06,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:18:06,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:18:06,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:18:06,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:18:06,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:18:06,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:18:06,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:18:06,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:18:06,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:18:06,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:18:06,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:18:06,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:18:06,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:18:06,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:18:06,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:18:06,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:18:06,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:18:06,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:18:06,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:18:06,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:18:06,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:18:06,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:18:06,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:18:06,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:18:06,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:18:06,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:18:06,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:18:06,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:18:06,404 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:18:06,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:18:06,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:18:06,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:18:06,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:18:06,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:18:06,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:18:06,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:18:06,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:18:06,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:18:06,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:18:06,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 20:18:06,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:18:06,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:18:06,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:18:06,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:18:06,450 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:18:06,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:18:06,451 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:18:06,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:18:06,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:18:06,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:18:06,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:18:06,452 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 20:18:06,453 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 20:18:06,453 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 20:18:06,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:18:06,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 20:18:06,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:18:06,454 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:18:06,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:18:06,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:18:06,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:18:06,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:18:06,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:18:06,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:18:06,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:18:06,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:18:06,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:18:06,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:18:06,458 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 276936ba1494f32a328b3de86f664a380d5263e9 [2020-11-29 20:18:06,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:18:06,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:18:06,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:18:06,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:18:06,830 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:18:06,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-29 20:18:06,937 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/data/b1803c044/91729acfc0ea42b88a4d7e296e3d4267/FLAGee85093d1 [2020-11-29 20:18:07,658 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:18:07,674 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-29 20:18:07,692 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/data/b1803c044/91729acfc0ea42b88a4d7e296e3d4267/FLAGee85093d1 [2020-11-29 20:18:07,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/data/b1803c044/91729acfc0ea42b88a4d7e296e3d4267 [2020-11-29 20:18:07,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:18:07,932 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 20:18:07,934 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:18:07,934 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:18:07,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:18:07,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:18:07" (1/1) ... [2020-11-29 20:18:07,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@244f4e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:07, skipping insertion in model container [2020-11-29 20:18:07,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:18:07" (1/1) ... [2020-11-29 20:18:07,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:18:07,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:18:08,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:18:08,505 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:18:08,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:18:08,639 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:18:08,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08 WrapperNode [2020-11-29 20:18:08,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:18:08,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:18:08,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:18:08,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:18:08,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... [2020-11-29 20:18:08,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:18:08,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:18:08,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:18:08,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:18:08,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:08,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 20:18:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:18:08,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 20:18:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 20:18:08,834 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 20:18:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 20:18:08,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 20:18:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2020-11-29 20:18:08,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 20:18:08,836 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 20:18:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 20:18:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 20:18:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 20:18:08,838 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 20:18:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 20:18:08,839 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 20:18:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 20:18:08,842 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 20:18:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 20:18:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 20:18:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 20:18:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 20:18:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 20:18:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 20:18:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 20:18:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 20:18:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 20:18:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 20:18:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 20:18:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 20:18:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 20:18:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 20:18:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 20:18:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 20:18:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 20:18:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 20:18:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 20:18:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 20:18:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 20:18:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 20:18:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 20:18:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 20:18:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 20:18:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 20:18:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 20:18:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 20:18:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 20:18:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 20:18:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 20:18:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 20:18:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 20:18:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 20:18:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 20:18:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 20:18:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 20:18:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 20:18:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 20:18:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 20:18:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 20:18:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 20:18:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 20:18:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 20:18:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 20:18:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 20:18:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 20:18:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 20:18:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 20:18:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 20:18:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 20:18:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 20:18:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 20:18:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 20:18:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 20:18:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 20:18:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 20:18:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 20:18:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 20:18:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 20:18:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 20:18:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 20:18:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 20:18:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 20:18:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 20:18:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 20:18:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 20:18:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 20:18:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 20:18:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 20:18:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 20:18:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 20:18:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 20:18:08,865 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 20:18:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 20:18:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 20:18:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 20:18:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 20:18:08,866 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 20:18:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 20:18:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 20:18:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 20:18:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 20:18:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 20:18:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 20:18:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 20:18:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 20:18:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 20:18:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 20:18:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 20:18:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 20:18:08,869 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 20:18:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 20:18:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 20:18:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 20:18:08,870 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 20:18:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 20:18:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 20:18:08,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 20:18:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-29 20:18:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2020-11-29 20:18:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 20:18:08,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 20:18:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:18:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 20:18:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 20:18:08,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 20:18:08,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:18:09,671 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:18:09,672 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-29 20:18:09,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:18:09 BoogieIcfgContainer [2020-11-29 20:18:09,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:18:09,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:18:09,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:18:09,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:18:09,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:18:07" (1/3) ... [2020-11-29 20:18:09,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411b6ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:18:09, skipping insertion in model container [2020-11-29 20:18:09,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:18:08" (2/3) ... [2020-11-29 20:18:09,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411b6ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:18:09, skipping insertion in model container [2020-11-29 20:18:09,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:18:09" (3/3) ... [2020-11-29 20:18:09,687 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2020-11-29 20:18:09,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:18:09,709 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-29 20:18:09,725 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-29 20:18:09,751 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:18:09,752 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 20:18:09,752 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:18:09,752 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:18:09,753 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:18:09,753 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:18:09,753 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:18:09,753 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:18:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-11-29 20:18:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:18:09,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:09,781 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:09,782 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:09,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232828, now seen corresponding path program 1 times [2020-11-29 20:18:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639603043] [2020-11-29 20:18:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:10,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639603043] [2020-11-29 20:18:10,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:10,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:18:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119281992] [2020-11-29 20:18:10,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:18:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:10,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:18:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:18:10,067 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2020-11-29 20:18:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:10,196 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-11-29 20:18:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:18:10,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-29 20:18:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:10,208 INFO L225 Difference]: With dead ends: 43 [2020-11-29 20:18:10,209 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 20:18:10,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:18:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 20:18:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-11-29 20:18:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:18:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-11-29 20:18:10,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2020-11-29 20:18:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:10,257 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-11-29 20:18:10,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:18:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-11-29 20:18:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:18:10,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:10,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:10,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:18:10,260 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232518, now seen corresponding path program 1 times [2020-11-29 20:18:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:10,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52446807] [2020-11-29 20:18:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:10,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52446807] [2020-11-29 20:18:10,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:10,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:18:10,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777892240] [2020-11-29 20:18:10,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:18:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:18:10,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:18:10,394 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 4 states. [2020-11-29 20:18:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:10,612 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-11-29 20:18:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:18:10,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-29 20:18:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:10,614 INFO L225 Difference]: With dead ends: 38 [2020-11-29 20:18:10,614 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 20:18:10,615 INFO L677 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 [2020-11-29 20:18:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 20:18:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 20:18:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 20:18:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-11-29 20:18:10,630 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2020-11-29 20:18:10,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:10,631 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-11-29 20:18:10,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:18:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-11-29 20:18:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:18:10,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:10,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:10,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:18:10,632 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232519, now seen corresponding path program 1 times [2020-11-29 20:18:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:10,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618904442] [2020-11-29 20:18:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:10,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618904442] [2020-11-29 20:18:10,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:10,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:18:10,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849471909] [2020-11-29 20:18:10,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:18:10,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:10,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:18:10,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:18:10,789 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2020-11-29 20:18:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:10,964 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-29 20:18:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:18:10,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 20:18:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:10,966 INFO L225 Difference]: With dead ends: 37 [2020-11-29 20:18:10,966 INFO L226 Difference]: Without dead ends: 37 [2020-11-29 20:18:10,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:18:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-29 20:18:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-29 20:18:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 20:18:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-11-29 20:18:10,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2020-11-29 20:18:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:10,973 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-11-29 20:18:10,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:18:10,974 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-11-29 20:18:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:18:10,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:10,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:10,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:18:10,975 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:10,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232572, now seen corresponding path program 1 times [2020-11-29 20:18:10,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:10,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692088644] [2020-11-29 20:18:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:11,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:11,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692088644] [2020-11-29 20:18:11,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:11,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:18:11,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75550809] [2020-11-29 20:18:11,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:18:11,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:18:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:18:11,089 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2020-11-29 20:18:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:11,242 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-11-29 20:18:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 20:18:11,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 20:18:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:11,249 INFO L225 Difference]: With dead ends: 45 [2020-11-29 20:18:11,249 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 20:18:11,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:18:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 20:18:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-11-29 20:18:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 20:18:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-11-29 20:18:11,266 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2020-11-29 20:18:11,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:11,266 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-11-29 20:18:11,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:18:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-11-29 20:18:11,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:18:11,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:11,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:11,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:18:11,268 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1287292154, now seen corresponding path program 1 times [2020-11-29 20:18:11,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:11,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369560980] [2020-11-29 20:18:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:11,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369560980] [2020-11-29 20:18:11,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:11,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:18:11,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17280062] [2020-11-29 20:18:11,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:18:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:11,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:18:11,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:18:11,387 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-11-29 20:18:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:11,608 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-11-29 20:18:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:18:11,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 20:18:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:11,611 INFO L225 Difference]: With dead ends: 49 [2020-11-29 20:18:11,611 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:18:11,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:18:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:18:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 20:18:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 20:18:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-11-29 20:18:11,629 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2020-11-29 20:18:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:11,630 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-11-29 20:18:11,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:18:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-11-29 20:18:11,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:18:11,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:11,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:11,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:18:11,633 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash -554371049, now seen corresponding path program 1 times [2020-11-29 20:18:11,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:11,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99303901] [2020-11-29 20:18:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:11,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99303901] [2020-11-29 20:18:11,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:11,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:18:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414112625] [2020-11-29 20:18:11,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:18:11,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:11,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:18:11,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:18:11,761 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2020-11-29 20:18:11,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:11,986 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-29 20:18:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:18:11,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-29 20:18:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:11,988 INFO L225 Difference]: With dead ends: 38 [2020-11-29 20:18:11,988 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 20:18:11,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:18:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 20:18:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-29 20:18:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-29 20:18:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-11-29 20:18:11,995 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2020-11-29 20:18:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:11,995 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-11-29 20:18:11,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:18:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-11-29 20:18:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:18:11,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:11,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:11,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:18:11,997 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:11,998 INFO L82 PathProgramCache]: Analyzing trace with hash -554371048, now seen corresponding path program 1 times [2020-11-29 20:18:11,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:11,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658428082] [2020-11-29 20:18:11,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:12,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658428082] [2020-11-29 20:18:12,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:12,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 20:18:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787071621] [2020-11-29 20:18:12,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:18:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:18:12,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:18:12,143 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 7 states. [2020-11-29 20:18:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:12,455 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-11-29 20:18:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:18:12,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 20:18:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:12,458 INFO L225 Difference]: With dead ends: 49 [2020-11-29 20:18:12,458 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 20:18:12,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:18:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 20:18:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-11-29 20:18:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 20:18:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-11-29 20:18:12,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2020-11-29 20:18:12,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:12,466 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-11-29 20:18:12,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:18:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-11-29 20:18:12,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 20:18:12,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:12,467 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:12,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 20:18:12,467 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1315055555, now seen corresponding path program 1 times [2020-11-29 20:18:12,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:12,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741476524] [2020-11-29 20:18:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:12,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:12,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741476524] [2020-11-29 20:18:12,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972014800] [2020-11-29 20:18:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:12,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 20:18:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:12,951 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:12,952 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:13,101 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-29 20:18:13,103 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:13,103 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:13,103 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:13,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:13,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-29 20:18:13,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869135042] [2020-11-29 20:18:13,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:18:13,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:18:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:18:13,196 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 7 states. [2020-11-29 20:18:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:13,461 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-29 20:18:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:18:13,462 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-29 20:18:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:13,463 INFO L225 Difference]: With dead ends: 52 [2020-11-29 20:18:13,463 INFO L226 Difference]: Without dead ends: 52 [2020-11-29 20:18:13,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:18:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-29 20:18:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-11-29 20:18:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:18:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-11-29 20:18:13,473 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 14 [2020-11-29 20:18:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:13,474 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-11-29 20:18:13,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:18:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-11-29 20:18:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:18:13,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:13,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:13,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-29 20:18:13,677 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash -319565009, now seen corresponding path program 1 times [2020-11-29 20:18:13,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:13,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603875667] [2020-11-29 20:18:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:13,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:13,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603875667] [2020-11-29 20:18:13,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:13,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:18:13,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436355555] [2020-11-29 20:18:13,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:18:13,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:13,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:18:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:18:13,742 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 4 states. [2020-11-29 20:18:13,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:13,861 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-11-29 20:18:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:18:13,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-29 20:18:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:13,863 INFO L225 Difference]: With dead ends: 44 [2020-11-29 20:18:13,863 INFO L226 Difference]: Without dead ends: 44 [2020-11-29 20:18:13,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:18:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-29 20:18:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-29 20:18:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 20:18:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-11-29 20:18:13,868 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 18 [2020-11-29 20:18:13,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:13,869 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-11-29 20:18:13,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:18:13,869 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-11-29 20:18:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:18:13,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:13,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:13,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 20:18:13,870 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:13,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:13,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2129811308, now seen corresponding path program 1 times [2020-11-29 20:18:13,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:13,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709524592] [2020-11-29 20:18:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:14,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:14,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709524592] [2020-11-29 20:18:14,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:14,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-29 20:18:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101842769] [2020-11-29 20:18:14,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 20:18:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:18:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:18:14,183 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2020-11-29 20:18:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:14,605 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2020-11-29 20:18:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:18:14,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-11-29 20:18:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:14,607 INFO L225 Difference]: With dead ends: 60 [2020-11-29 20:18:14,607 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 20:18:14,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-29 20:18:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 20:18:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-11-29 20:18:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 20:18:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2020-11-29 20:18:14,615 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 20 [2020-11-29 20:18:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:14,615 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2020-11-29 20:18:14,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 20:18:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2020-11-29 20:18:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:18:14,617 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:14,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:14,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 20:18:14,618 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1118694058, now seen corresponding path program 1 times [2020-11-29 20:18:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:14,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036955803] [2020-11-29 20:18:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:14,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:14,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036955803] [2020-11-29 20:18:14,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:14,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 20:18:14,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429168926] [2020-11-29 20:18:14,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 20:18:14,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 20:18:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-29 20:18:14,955 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 11 states. [2020-11-29 20:18:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:15,409 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-11-29 20:18:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 20:18:15,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-11-29 20:18:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:15,411 INFO L225 Difference]: With dead ends: 77 [2020-11-29 20:18:15,411 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 20:18:15,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-29 20:18:15,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 20:18:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-11-29 20:18:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 20:18:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-11-29 20:18:15,419 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 20 [2020-11-29 20:18:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:15,420 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-11-29 20:18:15,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 20:18:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-11-29 20:18:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:18:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:15,421 INFO L422 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] [2020-11-29 20:18:15,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 20:18:15,422 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:15,422 INFO L82 PathProgramCache]: Analyzing trace with hash 842532891, now seen corresponding path program 1 times [2020-11-29 20:18:15,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:15,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398355693] [2020-11-29 20:18:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:18:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:15,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398355693] [2020-11-29 20:18:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:18:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 20:18:15,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387472988] [2020-11-29 20:18:15,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:18:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:15,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:18:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:18:15,519 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 5 states. [2020-11-29 20:18:15,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:15,621 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2020-11-29 20:18:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:18:15,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-11-29 20:18:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:15,622 INFO L225 Difference]: With dead ends: 57 [2020-11-29 20:18:15,622 INFO L226 Difference]: Without dead ends: 34 [2020-11-29 20:18:15,623 INFO L677 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 [2020-11-29 20:18:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-29 20:18:15,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-29 20:18:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 20:18:15,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-29 20:18:15,627 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-11-29 20:18:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:15,627 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-29 20:18:15,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:18:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-29 20:18:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 20:18:15,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:15,628 INFO L422 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] [2020-11-29 20:18:15,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 20:18:15,629 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1168131629, now seen corresponding path program 1 times [2020-11-29 20:18:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:15,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120283887] [2020-11-29 20:18:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:15,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120283887] [2020-11-29 20:18:15,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399958479] [2020-11-29 20:18:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 20:18:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:16,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:16,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-29 20:18:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282876301] [2020-11-29 20:18:16,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 20:18:16,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 20:18:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:18:16,144 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-11-29 20:18:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:16,558 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-11-29 20:18:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:18:16,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-29 20:18:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:16,560 INFO L225 Difference]: With dead ends: 45 [2020-11-29 20:18:16,560 INFO L226 Difference]: Without dead ends: 43 [2020-11-29 20:18:16,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:18:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-29 20:18:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-11-29 20:18:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 20:18:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-11-29 20:18:16,565 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2020-11-29 20:18:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:16,565 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-11-29 20:18:16,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 20:18:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-11-29 20:18:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-29 20:18:16,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:16,567 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:16,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-29 20:18:16,792 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:16,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1984823745, now seen corresponding path program 2 times [2020-11-29 20:18:16,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:16,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073465225] [2020-11-29 20:18:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:17,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073465225] [2020-11-29 20:18:17,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483605823] [2020-11-29 20:18:17,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:17,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:18:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-29 20:18:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:17,462 INFO L384 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 [2020-11-29 20:18:17,463 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:17,473 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:17,475 INFO L545 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. [2020-11-29 20:18:17,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 20:18:18,032 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:18,033 INFO L384 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 18 [2020-11-29 20:18:18,033 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:18:18,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:18,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:18:18,060 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 20:18:18,064 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:18,064 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-11-29 20:18:18,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:18:18,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:18:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:18,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:18,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2020-11-29 20:18:18,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977498924] [2020-11-29 20:18:18,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:18:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:18:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:18:18,353 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 24 states. [2020-11-29 20:18:19,611 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-11-29 20:18:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:22,493 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-11-29 20:18:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-29 20:18:22,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-11-29 20:18:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:22,495 INFO L225 Difference]: With dead ends: 68 [2020-11-29 20:18:22,496 INFO L226 Difference]: Without dead ends: 53 [2020-11-29 20:18:22,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:18:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-29 20:18:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2020-11-29 20:18:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 20:18:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-11-29 20:18:22,501 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 30 [2020-11-29 20:18:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:22,501 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-11-29 20:18:22,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:18:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-11-29 20:18:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:18:22,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:22,503 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:22,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 20:18:22,716 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash -77155368, now seen corresponding path program 3 times [2020-11-29 20:18:22,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:22,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023164325] [2020-11-29 20:18:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:23,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:23,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023164325] [2020-11-29 20:18:23,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658186857] [2020-11-29 20:18:23,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:23,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 20:18:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:23,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 20:18:23,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:23,468 INFO L384 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 [2020-11-29 20:18:23,468 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:23,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:23,479 INFO L545 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. [2020-11-29 20:18:23,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:18:23,727 INFO L384 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 [2020-11-29 20:18:23,728 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:23,732 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:23,732 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:23,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:18:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:23,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:23,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2020-11-29 20:18:23,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029768740] [2020-11-29 20:18:23,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 20:18:23,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:23,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 20:18:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-11-29 20:18:23,746 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 23 states. [2020-11-29 20:18:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:24,606 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2020-11-29 20:18:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:18:24,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-11-29 20:18:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:24,607 INFO L225 Difference]: With dead ends: 76 [2020-11-29 20:18:24,607 INFO L226 Difference]: Without dead ends: 57 [2020-11-29 20:18:24,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:18:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-29 20:18:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-11-29 20:18:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 20:18:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-11-29 20:18:24,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2020-11-29 20:18:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:24,613 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-11-29 20:18:24,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 20:18:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-11-29 20:18:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-29 20:18:24,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:24,614 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:24,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:24,824 INFO L429 AbstractCegarLoop]: === Iteration 16 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:24,825 INFO L82 PathProgramCache]: Analyzing trace with hash -488427557, now seen corresponding path program 4 times [2020-11-29 20:18:24,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:24,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226247133] [2020-11-29 20:18:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:25,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:25,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226247133] [2020-11-29 20:18:25,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258274245] [2020-11-29 20:18:25,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:25,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:18:25,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:18:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:25,326 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:25,326 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:25,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:25,335 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:25,335 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:25,414 INFO L384 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 [2020-11-29 20:18:25,415 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:25,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:25,424 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:25,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:18:25,723 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:25,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:18:25,724 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:18:25,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:25,741 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:25,741 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:18:25,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:18:25,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:18:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:26,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:26,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 23 [2020-11-29 20:18:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910398119] [2020-11-29 20:18:26,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 20:18:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 20:18:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-11-29 20:18:26,037 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 24 states. [2020-11-29 20:18:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:27,252 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-11-29 20:18:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:18:27,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 44 [2020-11-29 20:18:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:27,254 INFO L225 Difference]: With dead ends: 62 [2020-11-29 20:18:27,254 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 20:18:27,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:18:27,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 20:18:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-11-29 20:18:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 20:18:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-11-29 20:18:27,259 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2020-11-29 20:18:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:27,259 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-11-29 20:18:27,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 20:18:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-11-29 20:18:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-11-29 20:18:27,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:27,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:27,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:18:27,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash 444231919, now seen corresponding path program 5 times [2020-11-29 20:18:27,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:27,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305549347] [2020-11-29 20:18:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:27,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:27,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305549347] [2020-11-29 20:18:27,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897318077] [2020-11-29 20:18:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:27,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 20:18:27,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 20:18:27,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:28,228 INFO L384 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 [2020-11-29 20:18:28,229 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:28,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:28,241 INFO L545 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. [2020-11-29 20:18:28,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:18:28,488 INFO L384 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 [2020-11-29 20:18:28,488 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:28,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:28,491 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:28,491 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:18:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:28,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 26 [2020-11-29 20:18:28,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307505179] [2020-11-29 20:18:28,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:18:28,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:28,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:18:28,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:18:28,504 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 26 states. [2020-11-29 20:18:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:29,518 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-11-29 20:18:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 20:18:29,519 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-11-29 20:18:29,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:29,519 INFO L225 Difference]: With dead ends: 92 [2020-11-29 20:18:29,519 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 20:18:29,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 20:18:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 20:18:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-11-29 20:18:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:18:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-11-29 20:18:29,524 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 50 [2020-11-29 20:18:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:29,524 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-11-29 20:18:29,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:18:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-11-29 20:18:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-29 20:18:29,527 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:29,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:29,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:18:29,741 INFO L429 AbstractCegarLoop]: === Iteration 18 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:29,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:29,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1547306290, now seen corresponding path program 6 times [2020-11-29 20:18:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:29,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865945283] [2020-11-29 20:18:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:30,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:30,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865945283] [2020-11-29 20:18:30,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458049589] [2020-11-29 20:18:30,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:30,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 20:18:30,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:30,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-29 20:18:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:30,220 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:30,220 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:30,228 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:30,228 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:30,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:30,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:30,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-11-29 20:18:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25104074] [2020-11-29 20:18:30,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:18:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:30,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:18:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:18:30,678 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2020-11-29 20:18:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:31,473 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-29 20:18:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:18:31,474 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-11-29 20:18:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:31,475 INFO L225 Difference]: With dead ends: 72 [2020-11-29 20:18:31,475 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 20:18:31,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 20:18:31,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 20:18:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-29 20:18:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 20:18:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-11-29 20:18:31,479 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 54 [2020-11-29 20:18:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:31,480 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-11-29 20:18:31,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:18:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-11-29 20:18:31,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-29 20:18:31,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:31,483 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:31,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:18:31,696 INFO L429 AbstractCegarLoop]: === Iteration 19 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1155246342, now seen corresponding path program 7 times [2020-11-29 20:18:31,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:31,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124419052] [2020-11-29 20:18:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:31,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:32,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:32,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124419052] [2020-11-29 20:18:32,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755340833] [2020-11-29 20:18:32,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-29 20:18:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:32,616 INFO L384 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 [2020-11-29 20:18:32,616 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:32,623 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:32,623 INFO L545 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. [2020-11-29 20:18:32,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:18:32,942 INFO L384 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 [2020-11-29 20:18:32,943 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:32,949 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:32,949 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:32,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:18:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:32,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:32,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2020-11-29 20:18:32,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097888531] [2020-11-29 20:18:33,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 20:18:33,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:33,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 20:18:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-11-29 20:18:33,003 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 29 states. [2020-11-29 20:18:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:34,456 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-11-29 20:18:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:18:34,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-11-29 20:18:34,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:34,458 INFO L225 Difference]: With dead ends: 108 [2020-11-29 20:18:34,458 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 20:18:34,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 20:18:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 20:18:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2020-11-29 20:18:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 20:18:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2020-11-29 20:18:34,463 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 60 [2020-11-29 20:18:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:34,463 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2020-11-29 20:18:34,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 20:18:34,463 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2020-11-29 20:18:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-11-29 20:18:34,465 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:34,465 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:34,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:34,680 INFO L429 AbstractCegarLoop]: === Iteration 20 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:34,681 INFO L82 PathProgramCache]: Analyzing trace with hash -754121335, now seen corresponding path program 8 times [2020-11-29 20:18:34,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:34,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824741761] [2020-11-29 20:18:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:35,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:35,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824741761] [2020-11-29 20:18:35,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198540751] [2020-11-29 20:18:35,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:35,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:18:35,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:35,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-29 20:18:35,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:35,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:35,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2020-11-29 20:18:35,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742810852] [2020-11-29 20:18:35,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-29 20:18:35,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:35,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-29 20:18:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2020-11-29 20:18:35,585 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 26 states. [2020-11-29 20:18:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:36,627 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-11-29 20:18:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 20:18:36,633 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2020-11-29 20:18:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:36,634 INFO L225 Difference]: With dead ends: 82 [2020-11-29 20:18:36,634 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 20:18:36,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 20:18:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 20:18:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-11-29 20:18:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:18:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-11-29 20:18:36,639 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2020-11-29 20:18:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:36,640 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-11-29 20:18:36,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-29 20:18:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-11-29 20:18:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-11-29 20:18:36,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:36,642 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:36,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:36,854 INFO L429 AbstractCegarLoop]: === Iteration 21 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 195873821, now seen corresponding path program 9 times [2020-11-29 20:18:36,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:36,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535714462] [2020-11-29 20:18:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:37,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:37,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:37,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535714462] [2020-11-29 20:18:37,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408394390] [2020-11-29 20:18:37,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:37,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 20:18:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:37,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-29 20:18:37,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:37,597 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:37,597 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:37,605 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:37,605 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:37,605 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:37,907 INFO L384 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 [2020-11-29 20:18:37,908 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:37,915 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:37,915 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:37,915 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-11-29 20:18:38,751 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:38,751 INFO L384 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 [2020-11-29 20:18:38,752 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:18:38,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:38,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:18:38,767 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:38,768 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:34 [2020-11-29 20:18:38,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:18:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:39,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:39,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2020-11-29 20:18:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933279381] [2020-11-29 20:18:39,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 20:18:39,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 20:18:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 20:18:39,172 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 40 states. [2020-11-29 20:18:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:43,563 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2020-11-29 20:18:43,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 20:18:43,563 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 70 [2020-11-29 20:18:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:43,564 INFO L225 Difference]: With dead ends: 132 [2020-11-29 20:18:43,565 INFO L226 Difference]: Without dead ends: 93 [2020-11-29 20:18:43,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=575, Invalid=4827, Unknown=0, NotChecked=0, Total=5402 [2020-11-29 20:18:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-29 20:18:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-11-29 20:18:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 20:18:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-11-29 20:18:43,571 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 70 [2020-11-29 20:18:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:43,571 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-11-29 20:18:43,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 20:18:43,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-11-29 20:18:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-11-29 20:18:43,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:43,573 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:43,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:43,788 INFO L429 AbstractCegarLoop]: === Iteration 22 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:43,789 INFO L82 PathProgramCache]: Analyzing trace with hash 383797812, now seen corresponding path program 10 times [2020-11-29 20:18:43,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:43,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369789996] [2020-11-29 20:18:43,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:44,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:44,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369789996] [2020-11-29 20:18:44,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329814911] [2020-11-29 20:18:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:44,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:18:44,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 20:18:44,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:44,510 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:44,511 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:44,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:44,521 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:44,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:44,890 INFO L384 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 [2020-11-29 20:18:44,890 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:44,895 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:44,896 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:44,896 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-11-29 20:18:45,601 INFO L384 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 24 treesize of output 18 [2020-11-29 20:18:45,603 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 20:18:45,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:45,623 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 20:18:45,626 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:45,626 INFO L384 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 17 treesize of output 10 [2020-11-29 20:18:45,626 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:45,634 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:45,636 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:45,636 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-11-29 20:18:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 121 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:45,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:45,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2020-11-29 20:18:45,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661596442] [2020-11-29 20:18:45,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-29 20:18:45,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:45,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-29 20:18:45,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1511, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 20:18:45,668 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 41 states. [2020-11-29 20:18:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:48,106 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2020-11-29 20:18:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 20:18:48,109 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-11-29 20:18:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:48,110 INFO L225 Difference]: With dead ends: 140 [2020-11-29 20:18:48,110 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 20:18:48,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=334, Invalid=3448, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 20:18:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 20:18:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2020-11-29 20:18:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-29 20:18:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-11-29 20:18:48,115 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 80 [2020-11-29 20:18:48,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:48,115 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-11-29 20:18:48,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-29 20:18:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-11-29 20:18:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-11-29 20:18:48,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:48,117 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:48,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 20:18:48,332 INFO L429 AbstractCegarLoop]: === Iteration 23 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:48,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 219236151, now seen corresponding path program 11 times [2020-11-29 20:18:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:48,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211755002] [2020-11-29 20:18:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:48,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:48,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211755002] [2020-11-29 20:18:48,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500843944] [2020-11-29 20:18:48,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:48,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 20:18:48,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:48,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-29 20:18:48,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:48,987 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:18:48,988 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:48,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:48,995 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:48,995 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:18:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:49,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:49,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 27 [2020-11-29 20:18:49,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102839069] [2020-11-29 20:18:49,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 20:18:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 20:18:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-11-29 20:18:49,415 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 28 states. [2020-11-29 20:18:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:50,675 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-11-29 20:18:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 20:18:50,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 84 [2020-11-29 20:18:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:50,677 INFO L225 Difference]: With dead ends: 102 [2020-11-29 20:18:50,677 INFO L226 Difference]: Without dead ends: 100 [2020-11-29 20:18:50,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=1255, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:18:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-29 20:18:50,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-29 20:18:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 20:18:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2020-11-29 20:18:50,682 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 84 [2020-11-29 20:18:50,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:50,683 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2020-11-29 20:18:50,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 20:18:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2020-11-29 20:18:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-11-29 20:18:50,684 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:50,684 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:50,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:50,896 INFO L429 AbstractCegarLoop]: === Iteration 24 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:50,897 INFO L82 PathProgramCache]: Analyzing trace with hash 473469771, now seen corresponding path program 12 times [2020-11-29 20:18:50,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:50,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913021756] [2020-11-29 20:18:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:51,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:51,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913021756] [2020-11-29 20:18:51,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753550710] [2020-11-29 20:18:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:51,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 20:18:51,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 58 conjunts are in the unsatisfiable core [2020-11-29 20:18:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:52,292 INFO L384 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 [2020-11-29 20:18:52,293 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:52,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:52,301 INFO L545 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. [2020-11-29 20:18:52,301 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:18:52,633 INFO L384 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 [2020-11-29 20:18:52,634 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:18:52,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:18:52,636 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:18:52,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:18:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:52,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:52,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 38 [2020-11-29 20:18:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21305589] [2020-11-29 20:18:52,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 20:18:52,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 20:18:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1317, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 20:18:52,665 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 38 states. [2020-11-29 20:18:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:55,182 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2020-11-29 20:18:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-29 20:18:55,183 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-11-29 20:18:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:55,184 INFO L225 Difference]: With dead ends: 156 [2020-11-29 20:18:55,184 INFO L226 Difference]: Without dead ends: 107 [2020-11-29 20:18:55,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 20:18:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-29 20:18:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2020-11-29 20:18:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 20:18:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2020-11-29 20:18:55,189 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 90 [2020-11-29 20:18:55,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:55,190 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2020-11-29 20:18:55,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 20:18:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2020-11-29 20:18:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-11-29 20:18:55,192 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:55,192 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:55,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 20:18:55,404 INFO L429 AbstractCegarLoop]: === Iteration 25 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash -641767282, now seen corresponding path program 13 times [2020-11-29 20:18:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:55,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787198656] [2020-11-29 20:18:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:56,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787198656] [2020-11-29 20:18:56,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378826192] [2020-11-29 20:18:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 52 conjunts are in the unsatisfiable core [2020-11-29 20:18:56,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:18:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:56,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:18:56,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 34 [2020-11-29 20:18:56,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958580898] [2020-11-29 20:18:56,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-29 20:18:56,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:18:56,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-29 20:18:56,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 20:18:56,828 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 35 states. [2020-11-29 20:18:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:18:58,143 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-11-29 20:18:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 20:18:58,143 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 94 [2020-11-29 20:18:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:18:58,144 INFO L225 Difference]: With dead ends: 112 [2020-11-29 20:18:58,144 INFO L226 Difference]: Without dead ends: 110 [2020-11-29 20:18:58,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=1823, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 20:18:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-29 20:18:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-11-29 20:18:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-29 20:18:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-11-29 20:18:58,150 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 94 [2020-11-29 20:18:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:18:58,151 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-11-29 20:18:58,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-29 20:18:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-11-29 20:18:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-11-29 20:18:58,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:18:58,152 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:18:58,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:18:58,368 INFO L429 AbstractCegarLoop]: === Iteration 26 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:18:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:18:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -699918494, now seen corresponding path program 14 times [2020-11-29 20:18:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:18:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858237038] [2020-11-29 20:18:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:18:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:59,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:18:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:18:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:18:59,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858237038] [2020-11-29 20:18:59,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645170551] [2020-11-29 20:18:59,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:18:59,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:18:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:18:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-29 20:18:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:19:00,129 INFO L384 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 [2020-11-29 20:19:00,130 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:00,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:00,141 INFO L545 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. [2020-11-29 20:19:00,141 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 20:19:01,790 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:01,790 INFO L384 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 18 [2020-11-29 20:19:01,791 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:19:01,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:01,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:19:01,809 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 20:19:01,819 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:01,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-11-29 20:19:01,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:19:01,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:19:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:02,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:19:02,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2020-11-29 20:19:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509004397] [2020-11-29 20:19:02,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-11-29 20:19:02,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:19:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-11-29 20:19:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2020-11-29 20:19:02,268 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 52 states. [2020-11-29 20:19:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:19:38,161 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2020-11-29 20:19:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 20:19:38,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 100 [2020-11-29 20:19:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:19:38,163 INFO L225 Difference]: With dead ends: 180 [2020-11-29 20:19:38,164 INFO L226 Difference]: Without dead ends: 123 [2020-11-29 20:19:38,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=488, Invalid=6987, Unknown=7, NotChecked=0, Total=7482 [2020-11-29 20:19:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-29 20:19:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2020-11-29 20:19:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-29 20:19:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2020-11-29 20:19:38,171 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 100 [2020-11-29 20:19:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:19:38,171 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2020-11-29 20:19:38,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-11-29 20:19:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2020-11-29 20:19:38,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-11-29 20:19:38,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:19:38,174 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:19:38,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 20:19:38,398 INFO L429 AbstractCegarLoop]: === Iteration 27 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:19:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:19:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash -76462471, now seen corresponding path program 15 times [2020-11-29 20:19:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:19:38,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473898114] [2020-11-29 20:19:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:19:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:39,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:19:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:39,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473898114] [2020-11-29 20:19:39,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578596939] [2020-11-29 20:19:39,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:19:39,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-29 20:19:39,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:19:39,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 72 conjunts are in the unsatisfiable core [2020-11-29 20:19:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:19:40,185 INFO L384 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 [2020-11-29 20:19:40,185 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:40,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:40,193 INFO L545 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. [2020-11-29 20:19:40,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:19:40,550 INFO L384 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 [2020-11-29 20:19:40,550 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:40,561 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:40,561 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:40,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:19:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:40,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:19:40,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 44 [2020-11-29 20:19:40,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131540610] [2020-11-29 20:19:40,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-29 20:19:40,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:19:40,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-29 20:19:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 20:19:40,593 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 44 states. [2020-11-29 20:19:43,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:19:43,597 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2020-11-29 20:19:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 20:19:43,597 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2020-11-29 20:19:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:19:43,599 INFO L225 Difference]: With dead ends: 188 [2020-11-29 20:19:43,599 INFO L226 Difference]: Without dead ends: 127 [2020-11-29 20:19:43,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=227, Invalid=3433, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 20:19:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-29 20:19:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-11-29 20:19:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-29 20:19:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2020-11-29 20:19:43,605 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 110 [2020-11-29 20:19:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:19:43,605 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2020-11-29 20:19:43,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-11-29 20:19:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2020-11-29 20:19:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-11-29 20:19:43,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:19:43,607 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:19:43,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 20:19:43,820 INFO L429 AbstractCegarLoop]: === Iteration 28 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:19:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:19:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1245961276, now seen corresponding path program 16 times [2020-11-29 20:19:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:19:43,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395805070] [2020-11-29 20:19:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:19:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:44,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:19:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395805070] [2020-11-29 20:19:44,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938960232] [2020-11-29 20:19:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:19:44,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:19:44,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:19:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 71 conjunts are in the unsatisfiable core [2020-11-29 20:19:44,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:19:44,817 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:19:44,817 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:44,825 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:44,825 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:44,825 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:19:44,947 INFO L384 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 [2020-11-29 20:19:44,947 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:44,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:44,955 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:44,956 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:19:45,730 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:45,730 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:19:45,730 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:19:45,742 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:45,742 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:45,742 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:19:45,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:19:45,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:19:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 162 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:46,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:19:46,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 44 [2020-11-29 20:19:46,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11515967] [2020-11-29 20:19:46,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-29 20:19:46,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:19:46,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-29 20:19:46,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1842, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 20:19:46,175 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 45 states. [2020-11-29 20:19:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:19:49,452 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2020-11-29 20:19:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:19:49,453 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 114 [2020-11-29 20:19:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:19:49,454 INFO L225 Difference]: With dead ends: 132 [2020-11-29 20:19:49,454 INFO L226 Difference]: Without dead ends: 130 [2020-11-29 20:19:49,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 20:19:49,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-29 20:19:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-11-29 20:19:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-11-29 20:19:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-11-29 20:19:49,459 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 114 [2020-11-29 20:19:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:19:49,460 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-11-29 20:19:49,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-29 20:19:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-11-29 20:19:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-11-29 20:19:49,461 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:19:49,461 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:19:49,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 20:19:49,676 INFO L429 AbstractCegarLoop]: === Iteration 29 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:19:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:19:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 887525520, now seen corresponding path program 17 times [2020-11-29 20:19:49,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:19:49,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122876166] [2020-11-29 20:19:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:19:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:50,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:19:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:50,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122876166] [2020-11-29 20:19:50,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967911134] [2020-11-29 20:19:50,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:19:51,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 20:19:51,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:19:51,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 78 conjunts are in the unsatisfiable core [2020-11-29 20:19:51,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:19:51,791 INFO L384 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 [2020-11-29 20:19:51,791 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:51,801 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:51,801 INFO L545 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. [2020-11-29 20:19:51,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:19:52,139 INFO L384 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 [2020-11-29 20:19:52,140 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:52,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:52,146 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:52,146 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:19:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:52,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:19:52,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 47 [2020-11-29 20:19:52,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663578324] [2020-11-29 20:19:52,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-29 20:19:52,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:19:52,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-29 20:19:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 20:19:52,191 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 47 states. [2020-11-29 20:19:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:19:55,193 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2020-11-29 20:19:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 20:19:55,194 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 120 [2020-11-29 20:19:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:19:55,195 INFO L225 Difference]: With dead ends: 204 [2020-11-29 20:19:55,195 INFO L226 Difference]: Without dead ends: 137 [2020-11-29 20:19:55,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=241, Invalid=3919, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 20:19:55,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-29 20:19:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-11-29 20:19:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-11-29 20:19:55,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-11-29 20:19:55,200 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 120 [2020-11-29 20:19:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:19:55,200 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-11-29 20:19:55,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-29 20:19:55,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-11-29 20:19:55,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-29 20:19:55,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:19:55,201 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:19:55,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 20:19:55,412 INFO L429 AbstractCegarLoop]: === Iteration 30 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:19:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:19:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash 729222803, now seen corresponding path program 18 times [2020-11-29 20:19:55,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:19:55,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556314350] [2020-11-29 20:19:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:19:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:56,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:19:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:19:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:56,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556314350] [2020-11-29 20:19:56,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104320227] [2020-11-29 20:19:56,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:19:56,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-29 20:19:56,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:19:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-29 20:19:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:19:56,462 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:19:56,462 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:19:56,468 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:19:56,468 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:19:56,468 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:19:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:19:57,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:19:57,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2020-11-29 20:19:57,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990845127] [2020-11-29 20:19:57,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-29 20:19:57,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:19:57,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-29 20:19:57,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=2521, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 20:19:57,623 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 54 states. [2020-11-29 20:20:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:00,117 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2020-11-29 20:20:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 20:20:00,118 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 124 [2020-11-29 20:20:00,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:00,119 INFO L225 Difference]: With dead ends: 142 [2020-11-29 20:20:00,119 INFO L226 Difference]: Without dead ends: 140 [2020-11-29 20:20:00,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=4013, Unknown=0, NotChecked=0, Total=4556 [2020-11-29 20:20:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-29 20:20:00,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-11-29 20:20:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-29 20:20:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2020-11-29 20:20:00,125 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 124 [2020-11-29 20:20:00,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:00,125 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2020-11-29 20:20:00,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-29 20:20:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2020-11-29 20:20:00,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-11-29 20:20:00,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:00,127 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:00,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:20:00,352 INFO L429 AbstractCegarLoop]: === Iteration 31 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:00,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:00,353 INFO L82 PathProgramCache]: Analyzing trace with hash 363488679, now seen corresponding path program 19 times [2020-11-29 20:20:00,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:00,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951049148] [2020-11-29 20:20:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:01,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:01,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951049148] [2020-11-29 20:20:01,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487745606] [2020-11-29 20:20:01,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 84 conjunts are in the unsatisfiable core [2020-11-29 20:20:01,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:02,149 INFO L384 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 [2020-11-29 20:20:02,150 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:02,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:02,156 INFO L545 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. [2020-11-29 20:20:02,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:20:02,633 INFO L384 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 [2020-11-29 20:20:02,633 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:02,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:02,636 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:02,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:20:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:02,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:02,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 50 [2020-11-29 20:20:02,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795486795] [2020-11-29 20:20:02,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-29 20:20:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:02,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-29 20:20:02,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2333, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 20:20:02,686 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 50 states. [2020-11-29 20:20:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:07,136 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2020-11-29 20:20:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 20:20:07,137 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 130 [2020-11-29 20:20:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:07,138 INFO L225 Difference]: With dead ends: 220 [2020-11-29 20:20:07,138 INFO L226 Difference]: Without dead ends: 147 [2020-11-29 20:20:07,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=255, Invalid=4437, Unknown=0, NotChecked=0, Total=4692 [2020-11-29 20:20:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-29 20:20:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-11-29 20:20:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-29 20:20:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2020-11-29 20:20:07,142 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 130 [2020-11-29 20:20:07,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:07,142 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2020-11-29 20:20:07,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-29 20:20:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2020-11-29 20:20:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-29 20:20:07,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:07,143 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:07,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 20:20:07,347 INFO L429 AbstractCegarLoop]: === Iteration 32 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1726184426, now seen corresponding path program 20 times [2020-11-29 20:20:07,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:07,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785414076] [2020-11-29 20:20:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:08,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785414076] [2020-11-29 20:20:08,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840611107] [2020-11-29 20:20:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:08,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:20:08,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:20:08,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 72 conjunts are in the unsatisfiable core [2020-11-29 20:20:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:09,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:09,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 46 [2020-11-29 20:20:09,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78037141] [2020-11-29 20:20:09,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-29 20:20:09,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:09,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-29 20:20:09,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1867, Unknown=0, NotChecked=0, Total=2162 [2020-11-29 20:20:09,102 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 47 states. [2020-11-29 20:20:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:11,613 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2020-11-29 20:20:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 20:20:11,614 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2020-11-29 20:20:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:11,615 INFO L225 Difference]: With dead ends: 152 [2020-11-29 20:20:11,615 INFO L226 Difference]: Without dead ends: 150 [2020-11-29 20:20:11,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2020-11-29 20:20:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-29 20:20:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-11-29 20:20:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-29 20:20:11,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-11-29 20:20:11,620 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 134 [2020-11-29 20:20:11,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:11,620 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-11-29 20:20:11,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-29 20:20:11,620 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-11-29 20:20:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-29 20:20:11,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:11,621 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:11,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-29 20:20:11,822 INFO L429 AbstractCegarLoop]: === Iteration 33 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash 294598078, now seen corresponding path program 21 times [2020-11-29 20:20:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:11,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614481327] [2020-11-29 20:20:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:13,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:13,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614481327] [2020-11-29 20:20:13,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90064941] [2020-11-29 20:20:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:13,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-29 20:20:13,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:20:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 90 conjunts are in the unsatisfiable core [2020-11-29 20:20:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:14,394 INFO L384 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 [2020-11-29 20:20:14,395 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:14,439 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:14,440 INFO L545 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. [2020-11-29 20:20:14,440 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:20:14,833 INFO L384 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 [2020-11-29 20:20:14,833 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:14,835 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:14,835 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:14,835 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:20:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:14,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:14,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 53 [2020-11-29 20:20:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158308260] [2020-11-29 20:20:14,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-29 20:20:14,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:14,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-29 20:20:14,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2632, Unknown=0, NotChecked=0, Total=2756 [2020-11-29 20:20:14,885 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 53 states. [2020-11-29 20:20:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:20,208 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2020-11-29 20:20:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 20:20:20,209 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 140 [2020-11-29 20:20:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:20,210 INFO L225 Difference]: With dead ends: 236 [2020-11-29 20:20:20,210 INFO L226 Difference]: Without dead ends: 157 [2020-11-29 20:20:20,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=269, Invalid=4987, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 20:20:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-11-29 20:20:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-11-29 20:20:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-29 20:20:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-11-29 20:20:20,216 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 140 [2020-11-29 20:20:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:20,216 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-11-29 20:20:20,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-29 20:20:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-11-29 20:20:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-11-29 20:20:20,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:20,218 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:20,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:20:20,418 INFO L429 AbstractCegarLoop]: === Iteration 34 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:20,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1900047295, now seen corresponding path program 22 times [2020-11-29 20:20:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:20,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845578243] [2020-11-29 20:20:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:21,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 231 proven. 575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:21,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845578243] [2020-11-29 20:20:21,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435764973] [2020-11-29 20:20:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:21,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:20:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:20:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 86 conjunts are in the unsatisfiable core [2020-11-29 20:20:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:21,626 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:20:21,626 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:21,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:21,634 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:21,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:20:21,757 INFO L384 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 [2020-11-29 20:20:21,757 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:21,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:21,765 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:21,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:20:23,034 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:23,034 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:20:23,035 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:20:23,047 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:23,048 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:23,048 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:20:23,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:20:23,137 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:20:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 288 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:23,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:23,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 35] total 53 [2020-11-29 20:20:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726675133] [2020-11-29 20:20:23,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-29 20:20:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-29 20:20:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2673, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 20:20:23,494 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 54 states. [2020-11-29 20:20:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:28,749 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2020-11-29 20:20:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-11-29 20:20:28,750 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 144 [2020-11-29 20:20:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:28,751 INFO L225 Difference]: With dead ends: 162 [2020-11-29 20:20:28,751 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 20:20:28,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=382, Invalid=4874, Unknown=0, NotChecked=0, Total=5256 [2020-11-29 20:20:28,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 20:20:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-11-29 20:20:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-29 20:20:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2020-11-29 20:20:28,756 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 144 [2020-11-29 20:20:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:28,757 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2020-11-29 20:20:28,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-29 20:20:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2020-11-29 20:20:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-29 20:20:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:28,758 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:28,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-29 20:20:28,959 INFO L429 AbstractCegarLoop]: === Iteration 35 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1949790421, now seen corresponding path program 23 times [2020-11-29 20:20:28,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:28,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113688911] [2020-11-29 20:20:28,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:29,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:30,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113688911] [2020-11-29 20:20:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482621637] [2020-11-29 20:20:30,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:30,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-29 20:20:30,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:20:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2020-11-29 20:20:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:30,685 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:20:30,685 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:30,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:30,695 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:30,695 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:20:31,737 INFO L384 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 [2020-11-29 20:20:31,737 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:31,745 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:31,746 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:31,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-11-29 20:20:33,441 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:33,441 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:20:33,442 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:20:33,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:33,455 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:33,455 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-11-29 20:20:33,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:20:33,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:20:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 276 proven. 609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:34,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:34,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 71 [2020-11-29 20:20:34,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831816567] [2020-11-29 20:20:34,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-29 20:20:34,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:34,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-29 20:20:34,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4750, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 20:20:34,063 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 71 states. [2020-11-29 20:20:46,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:46,186 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2020-11-29 20:20:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-29 20:20:46,187 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 150 [2020-11-29 20:20:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:46,189 INFO L225 Difference]: With dead ends: 260 [2020-11-29 20:20:46,189 INFO L226 Difference]: Without dead ends: 173 [2020-11-29 20:20:46,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=786, Invalid=15470, Unknown=0, NotChecked=0, Total=16256 [2020-11-29 20:20:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-29 20:20:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-11-29 20:20:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-11-29 20:20:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2020-11-29 20:20:46,196 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 150 [2020-11-29 20:20:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:46,197 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2020-11-29 20:20:46,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-29 20:20:46,197 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2020-11-29 20:20:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-11-29 20:20:46,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:46,198 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:46,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:20:46,412 INFO L429 AbstractCegarLoop]: === Iteration 36 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1477805804, now seen corresponding path program 24 times [2020-11-29 20:20:46,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:46,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574478184] [2020-11-29 20:20:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:48,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:48,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574478184] [2020-11-29 20:20:48,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71255030] [2020-11-29 20:20:48,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:48,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-11-29 20:20:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:20:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 100 conjunts are in the unsatisfiable core [2020-11-29 20:20:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:20:49,699 INFO L384 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 [2020-11-29 20:20:49,699 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:49,707 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:49,708 INFO L545 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. [2020-11-29 20:20:49,708 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:20:50,168 INFO L384 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 [2020-11-29 20:20:50,169 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:20:50,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:20:50,172 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:20:50,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:20:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:50,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:20:50,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 59 [2020-11-29 20:20:50,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141687215] [2020-11-29 20:20:50,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-29 20:20:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:20:50,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-29 20:20:50,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=3284, Unknown=0, NotChecked=0, Total=3422 [2020-11-29 20:20:50,233 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 59 states. [2020-11-29 20:20:57,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:20:57,376 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2020-11-29 20:20:57,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 20:20:57,376 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 160 [2020-11-29 20:20:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:20:57,377 INFO L225 Difference]: With dead ends: 268 [2020-11-29 20:20:57,378 INFO L226 Difference]: Without dead ends: 177 [2020-11-29 20:20:57,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=297, Invalid=6183, Unknown=0, NotChecked=0, Total=6480 [2020-11-29 20:20:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-11-29 20:20:57,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-11-29 20:20:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-29 20:20:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2020-11-29 20:20:57,382 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 160 [2020-11-29 20:20:57,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:20:57,382 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2020-11-29 20:20:57,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-29 20:20:57,383 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2020-11-29 20:20:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-11-29 20:20:57,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:20:57,384 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:20:57,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-29 20:20:57,584 INFO L429 AbstractCegarLoop]: === Iteration 37 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:20:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:20:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash -105871889, now seen corresponding path program 25 times [2020-11-29 20:20:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:20:57,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140814974] [2020-11-29 20:20:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:20:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:59,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:20:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:20:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140814974] [2020-11-29 20:20:59,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76536906] [2020-11-29 20:20:59,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:20:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:20:59,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 87 conjunts are in the unsatisfiable core [2020-11-29 20:20:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:21:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:00,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:21:00,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 55 [2020-11-29 20:21:00,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343476010] [2020-11-29 20:21:00,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-11-29 20:21:00,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:21:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-11-29 20:21:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2650, Unknown=0, NotChecked=0, Total=3080 [2020-11-29 20:21:00,470 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 56 states. [2020-11-29 20:21:04,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:21:04,434 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2020-11-29 20:21:04,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 20:21:04,435 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 164 [2020-11-29 20:21:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:21:04,437 INFO L225 Difference]: With dead ends: 182 [2020-11-29 20:21:04,437 INFO L226 Difference]: Without dead ends: 180 [2020-11-29 20:21:04,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=583, Invalid=4819, Unknown=0, NotChecked=0, Total=5402 [2020-11-29 20:21:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-29 20:21:04,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-11-29 20:21:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-29 20:21:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2020-11-29 20:21:04,442 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 164 [2020-11-29 20:21:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:21:04,443 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2020-11-29 20:21:04,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-11-29 20:21:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2020-11-29 20:21:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-11-29 20:21:04,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:21:04,444 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:21:04,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 20:21:04,645 INFO L429 AbstractCegarLoop]: === Iteration 38 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:21:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:21:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1653872637, now seen corresponding path program 26 times [2020-11-29 20:21:04,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:21:04,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242640002] [2020-11-29 20:21:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:21:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:06,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:21:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:06,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242640002] [2020-11-29 20:21:06,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372659750] [2020-11-29 20:21:06,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:21:06,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:21:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:21:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 98 conjunts are in the unsatisfiable core [2020-11-29 20:21:06,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:21:06,794 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:21:06,794 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:06,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:06,807 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:06,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:21:08,407 INFO L384 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 [2020-11-29 20:21:08,408 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:08,417 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:08,417 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:08,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-11-29 20:21:11,909 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:11,909 INFO L384 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 [2020-11-29 20:21:11,910 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:21:11,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:11,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 20:21:11,931 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:11,932 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:37 [2020-11-29 20:21:12,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:21:12,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:21:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 378 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:12,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:21:12,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 80 [2020-11-29 20:21:12,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145327169] [2020-11-29 20:21:12,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-29 20:21:12,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:21:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-29 20:21:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=6054, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 20:21:12,963 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 80 states. [2020-11-29 20:21:30,807 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-11-29 20:21:31,147 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-11-29 20:21:31,791 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-11-29 20:21:33,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:21:33,508 INFO L93 Difference]: Finished difference Result 292 states and 295 transitions. [2020-11-29 20:21:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-29 20:21:33,510 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2020-11-29 20:21:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:21:33,511 INFO L225 Difference]: With dead ends: 292 [2020-11-29 20:21:33,511 INFO L226 Difference]: Without dead ends: 193 [2020-11-29 20:21:33,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=921, Invalid=19671, Unknown=0, NotChecked=0, Total=20592 [2020-11-29 20:21:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-29 20:21:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2020-11-29 20:21:33,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-11-29 20:21:33,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2020-11-29 20:21:33,517 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 170 [2020-11-29 20:21:33,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:21:33,517 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2020-11-29 20:21:33,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-29 20:21:33,517 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2020-11-29 20:21:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-11-29 20:21:33,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:21:33,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:21:33,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 20:21:33,719 INFO L429 AbstractCegarLoop]: === Iteration 39 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:21:33,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:21:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash -515046374, now seen corresponding path program 27 times [2020-11-29 20:21:33,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:21:33,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53963625] [2020-11-29 20:21:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:21:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:35,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:21:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:35,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53963625] [2020-11-29 20:21:35,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958563174] [2020-11-29 20:21:35,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:21:36,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-29 20:21:36,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:21:36,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 114 conjunts are in the unsatisfiable core [2020-11-29 20:21:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:21:38,000 INFO L384 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 [2020-11-29 20:21:38,000 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:38,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:38,010 INFO L545 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. [2020-11-29 20:21:38,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:21:38,515 INFO L384 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 [2020-11-29 20:21:38,515 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:38,518 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:38,518 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:38,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:21:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:38,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:21:38,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 65 [2020-11-29 20:21:38,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814730235] [2020-11-29 20:21:38,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-29 20:21:38,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:21:38,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-29 20:21:38,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=4008, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 20:21:38,585 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 65 states. [2020-11-29 20:21:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:21:49,962 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2020-11-29 20:21:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 20:21:49,964 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 180 [2020-11-29 20:21:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:21:49,965 INFO L225 Difference]: With dead ends: 300 [2020-11-29 20:21:49,966 INFO L226 Difference]: Without dead ends: 197 [2020-11-29 20:21:49,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-11-29 20:21:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-11-29 20:21:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-11-29 20:21:49,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-29 20:21:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2020-11-29 20:21:49,972 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 180 [2020-11-29 20:21:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:21:49,972 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2020-11-29 20:21:49,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-29 20:21:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2020-11-29 20:21:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-11-29 20:21:49,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:21:49,974 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:21:50,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 20:21:50,196 INFO L429 AbstractCegarLoop]: === Iteration 40 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:21:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:21:50,196 INFO L82 PathProgramCache]: Analyzing trace with hash 876438429, now seen corresponding path program 28 times [2020-11-29 20:21:50,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:21:50,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913952889] [2020-11-29 20:21:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:21:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:51,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:21:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:21:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 435 proven. 959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913952889] [2020-11-29 20:21:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44534149] [2020-11-29 20:21:51,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:21:52,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:21:52,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:21:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 106 conjunts are in the unsatisfiable core [2020-11-29 20:21:52,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:21:52,040 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:21:52,040 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:52,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:52,049 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:52,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:21:52,206 INFO L384 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 [2020-11-29 20:21:52,206 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:21:52,215 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:52,216 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:52,216 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:21:54,309 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:54,309 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:21:54,310 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:21:54,324 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:21:54,324 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:21:54,324 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:21:54,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:21:54,466 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:21:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1394 backedges. 512 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:21:55,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:21:55,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 43] total 65 [2020-11-29 20:21:55,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979487254] [2020-11-29 20:21:55,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-29 20:21:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:21:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-29 20:21:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2020-11-29 20:21:55,079 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand 66 states. [2020-11-29 20:22:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:22:06,550 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2020-11-29 20:22:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 20:22:06,552 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 184 [2020-11-29 20:22:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:22:06,553 INFO L225 Difference]: With dead ends: 202 [2020-11-29 20:22:06,553 INFO L226 Difference]: Without dead ends: 200 [2020-11-29 20:22:06,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=512, Invalid=7320, Unknown=0, NotChecked=0, Total=7832 [2020-11-29 20:22:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-11-29 20:22:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-11-29 20:22:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-11-29 20:22:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2020-11-29 20:22:06,558 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 184 [2020-11-29 20:22:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:22:06,558 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2020-11-29 20:22:06,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-11-29 20:22:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2020-11-29 20:22:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-11-29 20:22:06,560 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:22:06,560 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:22:06,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 20:22:06,776 INFO L429 AbstractCegarLoop]: === Iteration 41 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:22:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:22:06,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1956334385, now seen corresponding path program 29 times [2020-11-29 20:22:06,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:22:06,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973274645] [2020-11-29 20:22:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:22:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:09,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:22:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973274645] [2020-11-29 20:22:09,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480072957] [2020-11-29 20:22:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:22:09,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-29 20:22:09,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:22:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 120 conjunts are in the unsatisfiable core [2020-11-29 20:22:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:22:11,286 INFO L384 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 [2020-11-29 20:22:11,286 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:22:11,295 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:22:11,296 INFO L545 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. [2020-11-29 20:22:11,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:22:11,885 INFO L384 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 [2020-11-29 20:22:11,885 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:22:11,890 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:22:11,890 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:22:11,890 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:22:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:11,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:22:11,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 68 [2020-11-29 20:22:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169288342] [2020-11-29 20:22:11,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-29 20:22:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:22:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-29 20:22:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=4397, Unknown=0, NotChecked=0, Total=4556 [2020-11-29 20:22:11,958 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 68 states. [2020-11-29 20:22:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:22:23,707 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2020-11-29 20:22:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 20:22:23,709 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 190 [2020-11-29 20:22:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:22:23,710 INFO L225 Difference]: With dead ends: 316 [2020-11-29 20:22:23,710 INFO L226 Difference]: Without dead ends: 207 [2020-11-29 20:22:23,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=339, Invalid=8217, Unknown=0, NotChecked=0, Total=8556 [2020-11-29 20:22:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-29 20:22:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2020-11-29 20:22:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-29 20:22:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-11-29 20:22:23,714 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 190 [2020-11-29 20:22:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:22:23,714 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-11-29 20:22:23,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-29 20:22:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-11-29 20:22:23,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-11-29 20:22:23,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:22:23,716 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:22:23,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:22:23,928 INFO L429 AbstractCegarLoop]: === Iteration 42 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:22:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:22:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -353869068, now seen corresponding path program 30 times [2020-11-29 20:22:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:22:23,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375411400] [2020-11-29 20:22:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:22:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:25,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:22:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:26,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375411400] [2020-11-29 20:22:26,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697801140] [2020-11-29 20:22:26,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:22:26,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-29 20:22:26,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:22:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 87 conjunts are in the unsatisfiable core [2020-11-29 20:22:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:22:27,008 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:22:27,008 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:22:27,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:22:27,018 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:22:27,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:22:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:30,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:22:30,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2020-11-29 20:22:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728799574] [2020-11-29 20:22:30,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-11-29 20:22:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:22:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-11-29 20:22:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=796, Invalid=5846, Unknown=0, NotChecked=0, Total=6642 [2020-11-29 20:22:30,781 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 82 states. [2020-11-29 20:22:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:22:39,033 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2020-11-29 20:22:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-29 20:22:39,035 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 194 [2020-11-29 20:22:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:22:39,036 INFO L225 Difference]: With dead ends: 212 [2020-11-29 20:22:39,036 INFO L226 Difference]: Without dead ends: 210 [2020-11-29 20:22:39,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1180, Invalid=9326, Unknown=0, NotChecked=0, Total=10506 [2020-11-29 20:22:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-11-29 20:22:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-11-29 20:22:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-29 20:22:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2020-11-29 20:22:39,041 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 194 [2020-11-29 20:22:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:22:39,042 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2020-11-29 20:22:39,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-11-29 20:22:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2020-11-29 20:22:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-11-29 20:22:39,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:22:39,044 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:22:39,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:22:39,260 INFO L429 AbstractCegarLoop]: === Iteration 43 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:22:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:22:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1393110344, now seen corresponding path program 31 times [2020-11-29 20:22:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:22:39,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697109056] [2020-11-29 20:22:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:22:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:42,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:22:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697109056] [2020-11-29 20:22:42,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222173419] [2020-11-29 20:22:42,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:22:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:22:42,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 126 conjunts are in the unsatisfiable core [2020-11-29 20:22:42,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:22:44,500 INFO L384 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 [2020-11-29 20:22:44,501 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:22:44,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:22:44,512 INFO L545 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. [2020-11-29 20:22:44,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:22:45,132 INFO L384 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 [2020-11-29 20:22:45,133 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:22:45,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:22:45,136 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:22:45,136 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:22:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:22:45,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:22:45,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 71 [2020-11-29 20:22:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995293458] [2020-11-29 20:22:45,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-29 20:22:45,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:22:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-29 20:22:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4804, Unknown=0, NotChecked=0, Total=4970 [2020-11-29 20:22:45,225 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 71 states. [2020-11-29 20:22:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:22:58,745 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2020-11-29 20:22:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 20:22:58,747 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 200 [2020-11-29 20:22:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:22:58,748 INFO L225 Difference]: With dead ends: 332 [2020-11-29 20:22:58,748 INFO L226 Difference]: Without dead ends: 217 [2020-11-29 20:22:58,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=353, Invalid=8959, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 20:22:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-11-29 20:22:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-11-29 20:22:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 20:22:58,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2020-11-29 20:22:58,754 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 200 [2020-11-29 20:22:58,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:22:58,754 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2020-11-29 20:22:58,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-29 20:22:58,754 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2020-11-29 20:22:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-11-29 20:22:58,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:22:58,765 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:22:58,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 20:22:58,966 INFO L429 AbstractCegarLoop]: === Iteration 44 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:22:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:22:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash 56208715, now seen corresponding path program 32 times [2020-11-29 20:22:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:22:58,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427404449] [2020-11-29 20:22:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:22:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:00,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:23:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 561 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:01,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427404449] [2020-11-29 20:23:01,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855082049] [2020-11-29 20:23:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:23:01,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:23:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 107 conjunts are in the unsatisfiable core [2020-11-29 20:23:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 630 proven. 1118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:03,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:03,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 67 [2020-11-29 20:23:03,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694125360] [2020-11-29 20:23:03,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-11-29 20:23:03,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:03,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-11-29 20:23:03,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=3904, Unknown=0, NotChecked=0, Total=4556 [2020-11-29 20:23:03,264 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand 68 states. [2020-11-29 20:23:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:10,681 INFO L93 Difference]: Finished difference Result 222 states and 225 transitions. [2020-11-29 20:23:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 20:23:10,683 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 204 [2020-11-29 20:23:10,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:10,684 INFO L225 Difference]: With dead ends: 222 [2020-11-29 20:23:10,684 INFO L226 Difference]: Without dead ends: 220 [2020-11-29 20:23:10,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=841, Invalid=7169, Unknown=0, NotChecked=0, Total=8010 [2020-11-29 20:23:10,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-29 20:23:10,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-11-29 20:23:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-11-29 20:23:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2020-11-29 20:23:10,689 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 204 [2020-11-29 20:23:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:10,689 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2020-11-29 20:23:10,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-11-29 20:23:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2020-11-29 20:23:10,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-11-29 20:23:10,690 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:10,691 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:10,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:10,904 INFO L429 AbstractCegarLoop]: === Iteration 45 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:23:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash 437852767, now seen corresponding path program 33 times [2020-11-29 20:23:10,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:10,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605740300] [2020-11-29 20:23:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:14,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:23:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605740300] [2020-11-29 20:23:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873155609] [2020-11-29 20:23:14,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:23:14,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-11-29 20:23:14,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 132 conjunts are in the unsatisfiable core [2020-11-29 20:23:14,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:17,086 INFO L384 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 [2020-11-29 20:23:17,086 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:23:17,096 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:17,096 INFO L545 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. [2020-11-29 20:23:17,096 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:23:17,714 INFO L384 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 [2020-11-29 20:23:17,715 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:23:17,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:17,718 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:23:17,718 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:23:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:17,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:17,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 74 [2020-11-29 20:23:17,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181045251] [2020-11-29 20:23:17,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-11-29 20:23:17,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-11-29 20:23:17,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=5229, Unknown=0, NotChecked=0, Total=5402 [2020-11-29 20:23:17,795 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 74 states. [2020-11-29 20:23:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:31,904 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2020-11-29 20:23:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-29 20:23:31,906 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 210 [2020-11-29 20:23:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:31,907 INFO L225 Difference]: With dead ends: 348 [2020-11-29 20:23:31,907 INFO L226 Difference]: Without dead ends: 227 [2020-11-29 20:23:31,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=367, Invalid=9733, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 20:23:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-11-29 20:23:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2020-11-29 20:23:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-11-29 20:23:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2020-11-29 20:23:31,913 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 210 [2020-11-29 20:23:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:31,913 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2020-11-29 20:23:31,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-11-29 20:23:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2020-11-29 20:23:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-11-29 20:23:31,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:31,915 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:32,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 20:23:32,124 INFO L429 AbstractCegarLoop]: === Iteration 46 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:23:32,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:32,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1099451742, now seen corresponding path program 34 times [2020-11-29 20:23:32,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:32,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191807887] [2020-11-29 20:23:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:34,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:23:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:23:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:34,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191807887] [2020-11-29 20:23:34,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397205403] [2020-11-29 20:23:34,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:23:34,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:23:34,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:23:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 121 conjunts are in the unsatisfiable core [2020-11-29 20:23:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:23:34,955 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:23:34,956 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:23:34,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:34,967 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:23:34,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:23:35,186 INFO L384 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 [2020-11-29 20:23:35,187 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:23:35,198 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:35,199 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:23:35,199 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:23:38,600 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:38,600 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:23:38,601 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:23:38,624 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:23:38,624 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:23:38,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:23:38,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:23:38,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:23:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 722 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:23:39,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:23:39,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 49] total 74 [2020-11-29 20:23:39,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828645307] [2020-11-29 20:23:39,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-29 20:23:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:23:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-29 20:23:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=5207, Unknown=0, NotChecked=0, Total=5550 [2020-11-29 20:23:39,671 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand 75 states. [2020-11-29 20:23:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:23:57,052 INFO L93 Difference]: Finished difference Result 232 states and 235 transitions. [2020-11-29 20:23:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 20:23:57,054 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 214 [2020-11-29 20:23:57,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:23:57,055 INFO L225 Difference]: With dead ends: 232 [2020-11-29 20:23:57,055 INFO L226 Difference]: Without dead ends: 230 [2020-11-29 20:23:57,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=620, Invalid=9480, Unknown=0, NotChecked=0, Total=10100 [2020-11-29 20:23:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-11-29 20:23:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2020-11-29 20:23:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-11-29 20:23:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2020-11-29 20:23:57,062 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 214 [2020-11-29 20:23:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:23:57,063 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2020-11-29 20:23:57,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-29 20:23:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2020-11-29 20:23:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-11-29 20:23:57,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:23:57,065 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:23:57,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:23:57,265 INFO L429 AbstractCegarLoop]: === Iteration 47 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:23:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:23:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1933942, now seen corresponding path program 35 times [2020-11-29 20:23:57,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:23:57,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822948878] [2020-11-29 20:23:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:23:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:00,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:24:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:00,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822948878] [2020-11-29 20:24:00,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34540815] [2020-11-29 20:24:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:24:01,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-11-29 20:24:01,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:24:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 138 conjunts are in the unsatisfiable core [2020-11-29 20:24:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:24:04,180 INFO L384 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 [2020-11-29 20:24:04,180 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:24:04,192 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:24:04,193 INFO L545 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. [2020-11-29 20:24:04,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:24:04,978 INFO L384 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 [2020-11-29 20:24:04,978 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:24:04,983 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:24:04,984 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:24:04,984 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:24:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:24:05,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 77 [2020-11-29 20:24:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821590392] [2020-11-29 20:24:05,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-29 20:24:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:24:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-29 20:24:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5672, Unknown=0, NotChecked=0, Total=5852 [2020-11-29 20:24:05,141 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 77 states. [2020-11-29 20:24:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:24:21,540 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2020-11-29 20:24:21,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-29 20:24:21,542 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 220 [2020-11-29 20:24:21,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:24:21,543 INFO L225 Difference]: With dead ends: 364 [2020-11-29 20:24:21,543 INFO L226 Difference]: Without dead ends: 237 [2020-11-29 20:24:21,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=381, Invalid=10539, Unknown=0, NotChecked=0, Total=10920 [2020-11-29 20:24:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-11-29 20:24:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-11-29 20:24:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-29 20:24:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 236 transitions. [2020-11-29 20:24:21,551 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 236 transitions. Word has length 220 [2020-11-29 20:24:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:24:21,551 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 236 transitions. [2020-11-29 20:24:21,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-29 20:24:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 236 transitions. [2020-11-29 20:24:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-29 20:24:21,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:24:21,554 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:24:21,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 20:24:21,780 INFO L429 AbstractCegarLoop]: === Iteration 48 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:24:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:24:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash 150528761, now seen corresponding path program 36 times [2020-11-29 20:24:21,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:24:21,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389741523] [2020-11-29 20:24:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:24:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:24,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:24:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 703 proven. 1439 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389741523] [2020-11-29 20:24:24,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836766671] [2020-11-29 20:24:24,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:24:26,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-11-29 20:24:26,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:24:26,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 99 conjunts are in the unsatisfiable core [2020-11-29 20:24:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:24:26,531 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:24:26,532 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:24:26,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:24:26,545 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:24:26,546 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:24:32,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 780 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:32,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:24:32,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2020-11-29 20:24:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255796529] [2020-11-29 20:24:32,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-11-29 20:24:32,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:24:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-11-29 20:24:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1051, Invalid=7691, Unknown=0, NotChecked=0, Total=8742 [2020-11-29 20:24:32,605 INFO L87 Difference]: Start difference. First operand 234 states and 236 transitions. Second operand 94 states. [2020-11-29 20:24:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:24:44,867 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2020-11-29 20:24:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-29 20:24:44,869 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 224 [2020-11-29 20:24:44,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:24:44,870 INFO L225 Difference]: With dead ends: 242 [2020-11-29 20:24:44,870 INFO L226 Difference]: Without dead ends: 240 [2020-11-29 20:24:44,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4037 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1528, Invalid=12278, Unknown=0, NotChecked=0, Total=13806 [2020-11-29 20:24:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-11-29 20:24:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-11-29 20:24:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-29 20:24:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2020-11-29 20:24:44,877 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 224 [2020-11-29 20:24:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:24:44,878 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2020-11-29 20:24:44,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-11-29 20:24:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2020-11-29 20:24:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-11-29 20:24:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:24:44,880 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:24:45,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-29 20:24:45,108 INFO L429 AbstractCegarLoop]: === Iteration 49 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:24:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:24:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash -885467763, now seen corresponding path program 37 times [2020-11-29 20:24:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:24:45,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656897853] [2020-11-29 20:24:45,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:24:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:49,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:24:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:49,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656897853] [2020-11-29 20:24:49,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990424794] [2020-11-29 20:24:49,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:24:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:24:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 144 conjunts are in the unsatisfiable core [2020-11-29 20:24:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:24:52,260 INFO L384 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 [2020-11-29 20:24:52,260 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:24:52,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:24:52,272 INFO L545 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. [2020-11-29 20:24:52,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:24:53,055 INFO L384 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 [2020-11-29 20:24:53,056 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:24:53,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:24:53,059 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:24:53,059 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:24:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:24:53,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:24:53,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 80 [2020-11-29 20:24:53,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373645195] [2020-11-29 20:24:53,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-11-29 20:24:53,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:24:53,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-11-29 20:24:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=6133, Unknown=0, NotChecked=0, Total=6320 [2020-11-29 20:24:53,151 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 80 states. [2020-11-29 20:25:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:25:12,113 INFO L93 Difference]: Finished difference Result 380 states and 382 transitions. [2020-11-29 20:25:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-29 20:25:12,116 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 230 [2020-11-29 20:25:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:25:12,117 INFO L225 Difference]: With dead ends: 380 [2020-11-29 20:25:12,117 INFO L226 Difference]: Without dead ends: 247 [2020-11-29 20:25:12,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=395, Invalid=11377, Unknown=0, NotChecked=0, Total=11772 [2020-11-29 20:25:12,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-11-29 20:25:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2020-11-29 20:25:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-11-29 20:25:12,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2020-11-29 20:25:12,124 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 230 [2020-11-29 20:25:12,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:25:12,124 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2020-11-29 20:25:12,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-11-29 20:25:12,124 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2020-11-29 20:25:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-11-29 20:25:12,125 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:25:12,126 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:25:12,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-29 20:25:12,340 INFO L429 AbstractCegarLoop]: === Iteration 50 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:25:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:25:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1302090160, now seen corresponding path program 38 times [2020-11-29 20:25:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:25:12,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524619468] [2020-11-29 20:25:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:25:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:25:15,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:25:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:25:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:25:15,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524619468] [2020-11-29 20:25:15,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662923255] [2020-11-29 20:25:15,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:25:16,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:25:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:25:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 124 conjunts are in the unsatisfiable core [2020-11-29 20:25:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:25:16,154 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:25:16,154 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:25:16,166 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:25:16,167 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:25:16,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:25:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:25:22,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:25:22,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-11-29 20:25:22,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252247068] [2020-11-29 20:25:22,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-29 20:25:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:25:22,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-29 20:25:22,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=8402, Unknown=0, NotChecked=0, Total=9312 [2020-11-29 20:25:22,523 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand 97 states. [2020-11-29 20:25:34,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:25:34,910 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2020-11-29 20:25:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-11-29 20:25:34,913 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 234 [2020-11-29 20:25:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:25:34,914 INFO L225 Difference]: With dead ends: 252 [2020-11-29 20:25:34,914 INFO L226 Difference]: Without dead ends: 250 [2020-11-29 20:25:34,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5130 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1146, Invalid=13616, Unknown=0, NotChecked=0, Total=14762 [2020-11-29 20:25:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-29 20:25:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-11-29 20:25:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-11-29 20:25:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2020-11-29 20:25:34,919 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 234 [2020-11-29 20:25:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:25:34,920 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2020-11-29 20:25:34,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-29 20:25:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2020-11-29 20:25:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-11-29 20:25:34,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:25:34,935 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:25:35,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 20:25:35,155 INFO L429 AbstractCegarLoop]: === Iteration 51 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:25:35,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:25:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash -933395548, now seen corresponding path program 39 times [2020-11-29 20:25:35,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:25:35,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707520957] [2020-11-29 20:25:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:25:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:25:39,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:25:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:25:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:25:39,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707520957] [2020-11-29 20:25:39,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393344323] [2020-11-29 20:25:39,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:25:41,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-11-29 20:25:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:25:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 148 conjunts are in the unsatisfiable core [2020-11-29 20:25:41,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:25:44,773 INFO L384 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 [2020-11-29 20:25:44,773 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:25:44,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:25:44,788 INFO L545 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. [2020-11-29 20:25:44,788 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:25:45,608 INFO L384 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 [2020-11-29 20:25:45,608 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:25:45,612 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:25:45,612 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:25:45,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:25:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:25:45,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:25:45,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 83 [2020-11-29 20:25:45,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135570714] [2020-11-29 20:25:45,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-29 20:25:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:25:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-29 20:25:45,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=6612, Unknown=0, NotChecked=0, Total=6806 [2020-11-29 20:25:45,730 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 83 states. [2020-11-29 20:26:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:07,973 INFO L93 Difference]: Finished difference Result 396 states and 398 transitions. [2020-11-29 20:26:07,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-29 20:26:07,975 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 240 [2020-11-29 20:26:07,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:07,977 INFO L225 Difference]: With dead ends: 396 [2020-11-29 20:26:07,977 INFO L226 Difference]: Without dead ends: 257 [2020-11-29 20:26:07,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=409, Invalid=12247, Unknown=0, NotChecked=0, Total=12656 [2020-11-29 20:26:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-11-29 20:26:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 254. [2020-11-29 20:26:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-11-29 20:26:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 256 transitions. [2020-11-29 20:26:07,982 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 256 transitions. Word has length 240 [2020-11-29 20:26:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:07,983 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 256 transitions. [2020-11-29 20:26:07,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-29 20:26:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 256 transitions. [2020-11-29 20:26:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-11-29 20:26:07,985 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:07,985 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:08,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:26:08,200 INFO L429 AbstractCegarLoop]: === Iteration 52 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:26:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1542552409, now seen corresponding path program 40 times [2020-11-29 20:26:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:08,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985360077] [2020-11-29 20:26:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:11,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:26:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 861 proven. 1715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:11,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985360077] [2020-11-29 20:26:11,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91917531] [2020-11-29 20:26:11,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:26:12,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 20:26:12,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:26:12,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 136 conjunts are in the unsatisfiable core [2020-11-29 20:26:12,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:12,179 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:26:12,179 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:26:12,195 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:12,196 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:26:12,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-29 20:26:12,524 INFO L384 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 [2020-11-29 20:26:12,524 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:26:12,539 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:12,539 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:26:12,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-11-29 20:26:17,841 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:17,841 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:26:17,842 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:26:17,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:17,871 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:26:17,871 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-11-29 20:26:18,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:18,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:26:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 968 proven. 1608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:19,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:26:19,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 55] total 83 [2020-11-29 20:26:19,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949552448] [2020-11-29 20:26:19,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-11-29 20:26:19,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:19,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-11-29 20:26:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=6548, Unknown=0, NotChecked=0, Total=6972 [2020-11-29 20:26:19,305 INFO L87 Difference]: Start difference. First operand 254 states and 256 transitions. Second operand 84 states. [2020-11-29 20:26:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:26:47,368 INFO L93 Difference]: Finished difference Result 262 states and 265 transitions. [2020-11-29 20:26:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-29 20:26:47,371 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 244 [2020-11-29 20:26:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:26:47,373 INFO L225 Difference]: With dead ends: 262 [2020-11-29 20:26:47,373 INFO L226 Difference]: Without dead ends: 260 [2020-11-29 20:26:47,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=737, Invalid=11919, Unknown=0, NotChecked=0, Total=12656 [2020-11-29 20:26:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-11-29 20:26:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2020-11-29 20:26:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-11-29 20:26:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2020-11-29 20:26:47,379 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 244 [2020-11-29 20:26:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:26:47,380 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2020-11-29 20:26:47,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-11-29 20:26:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2020-11-29 20:26:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-11-29 20:26:47,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:26:47,382 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:26:47,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:26:47,596 INFO L429 AbstractCegarLoop]: === Iteration 53 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:26:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:26:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1035076421, now seen corresponding path program 41 times [2020-11-29 20:26:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:26:47,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385721512] [2020-11-29 20:26:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:26:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:26:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:26:52,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385721512] [2020-11-29 20:26:52,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142068650] [2020-11-29 20:26:52,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:26:53,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-11-29 20:26:53,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:26:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 154 conjunts are in the unsatisfiable core [2020-11-29 20:26:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:26:57,786 INFO L384 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 [2020-11-29 20:26:57,787 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:26:57,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:57,801 INFO L545 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. [2020-11-29 20:26:57,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-11-29 20:26:58,733 INFO L384 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 [2020-11-29 20:26:58,734 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:26:58,738 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:26:58,738 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:26:58,738 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-29 20:26:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:26:58,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:26:58,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 86 [2020-11-29 20:26:58,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597826549] [2020-11-29 20:26:58,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-11-29 20:26:58,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:26:58,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-11-29 20:26:58,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=7109, Unknown=0, NotChecked=0, Total=7310 [2020-11-29 20:26:58,864 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 86 states. [2020-11-29 20:27:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:27,308 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-11-29 20:27:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-11-29 20:27:27,310 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 250 [2020-11-29 20:27:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:27,312 INFO L225 Difference]: With dead ends: 412 [2020-11-29 20:27:27,312 INFO L226 Difference]: Without dead ends: 267 [2020-11-29 20:27:27,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=423, Invalid=13149, Unknown=0, NotChecked=0, Total=13572 [2020-11-29 20:27:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-11-29 20:27:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2020-11-29 20:27:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-29 20:27:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 266 transitions. [2020-11-29 20:27:27,318 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 266 transitions. Word has length 250 [2020-11-29 20:27:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:27,319 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 266 transitions. [2020-11-29 20:27:27,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-11-29 20:27:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 266 transitions. [2020-11-29 20:27:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-11-29 20:27:27,321 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:27:27,321 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:27:27,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:27,521 INFO L429 AbstractCegarLoop]: === Iteration 54 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-29 20:27:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:27:27,522 INFO L82 PathProgramCache]: Analyzing trace with hash 404739582, now seen corresponding path program 42 times [2020-11-29 20:27:27,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:27:27,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193755880] [2020-11-29 20:27:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:27:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:31,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 20:27:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:27:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:27:31,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193755880] [2020-11-29 20:27:31,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599950334] [2020-11-29 20:27:31,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/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 [2020-11-29 20:27:35,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-11-29 20:27:35,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:27:35,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 78 conjunts are in the unsatisfiable core [2020-11-29 20:27:35,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:27:35,059 INFO L384 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 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-29 20:27:35,059 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:27:35,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:27:35,072 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:27:35,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-29 20:27:35,571 INFO L384 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 [2020-11-29 20:27:35,571 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 20:27:35,575 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:27:35,575 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 20:27:35,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-11-29 20:27:35,985 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:27:35,986 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-11-29 20:27:35,986 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 20:27:35,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 20:27:35,998 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-29 20:27:35,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2020-11-29 20:27:36,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:36,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:27:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 93 proven. 139 refuted. 0 times theorem prover too weak. 2576 trivial. 0 not checked. [2020-11-29 20:27:37,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:27:37,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 12] total 64 [2020-11-29 20:27:37,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374669068] [2020-11-29 20:27:37,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-29 20:27:37,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:27:37,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-29 20:27:37,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=3628, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 20:27:37,009 INFO L87 Difference]: Start difference. First operand 264 states and 266 transitions. Second operand 65 states. [2020-11-29 20:27:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:27:55,746 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-11-29 20:27:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-11-29 20:27:55,749 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2020-11-29 20:27:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:27:55,749 INFO L225 Difference]: With dead ends: 262 [2020-11-29 20:27:55,749 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:27:55,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4344 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=2552, Invalid=17754, Unknown=0, NotChecked=0, Total=20306 [2020-11-29 20:27:55,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:27:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:27:55,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:27:55,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:27:55,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 254 [2020-11-29 20:27:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:27:55,751 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:27:55,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-29 20:27:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:27:55,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:27:55,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:27:55,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:27:55 BoogieIcfgContainer [2020-11-29 20:27:55,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:27:55,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:27:55,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:27:55,957 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:27:55,958 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:18:09" (3/4) ... [2020-11-29 20:27:55,962 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:27:55,969 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrchr [2020-11-29 20:27:55,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 20:27:55,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-11-29 20:27:55,970 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-11-29 20:27:55,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-11-29 20:27:55,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-11-29 20:27:55,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 20:27:55,971 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-11-29 20:27:55,985 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-11-29 20:27:55,986 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-29 20:27:55,986 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:27:55,986 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 20:27:56,038 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_506737f8-286c-41bb-acda-c51ab82df8e7/bin/uautomizer/witness.graphml [2020-11-29 20:27:56,038 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:27:56,039 INFO L168 Benchmark]: Toolchain (without parser) took 588107.36 ms. Allocated memory was 92.3 MB in the beginning and 255.9 MB in the end (delta: 163.6 MB). Free memory was 58.7 MB in the beginning and 92.5 MB in the end (delta: -33.8 MB). Peak memory consumption was 127.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,040 INFO L168 Benchmark]: CDTParser took 0.86 ms. Allocated memory is still 69.2 MB. Free memory was 34.9 MB in the beginning and 34.8 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:27:56,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.41 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 57.9 MB in the end (delta: 571.9 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,041 INFO L168 Benchmark]: Boogie Preprocessor took 79.06 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 55.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,041 INFO L168 Benchmark]: RCFGBuilder took 952.51 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 55.5 MB in the beginning and 84.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,042 INFO L168 Benchmark]: TraceAbstraction took 586279.72 ms. Allocated memory was 121.6 MB in the beginning and 255.9 MB in the end (delta: 134.2 MB). Free memory was 83.1 MB in the beginning and 95.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 122.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,042 INFO L168 Benchmark]: Witness Printer took 81.25 ms. Allocated memory is still 255.9 MB. Free memory was 95.2 MB in the beginning and 92.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:27:56,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.86 ms. Allocated memory is still 69.2 MB. Free memory was 34.9 MB in the beginning and 34.8 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 707.41 ms. Allocated memory is still 92.3 MB. Free memory was 58.5 MB in the beginning and 57.9 MB in the end (delta: 571.9 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 79.06 ms. Allocated memory is still 92.3 MB. Free memory was 57.9 MB in the beginning and 55.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 952.51 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 55.5 MB in the beginning and 84.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 586279.72 ms. Allocated memory was 121.6 MB in the beginning and 255.9 MB in the end (delta: 134.2 MB). Free memory was 83.1 MB in the beginning and 95.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 122.8 MB. Max. memory is 16.1 GB. * Witness Printer took 81.25 ms. Allocated memory is still 255.9 MB. Free memory was 95.2 MB in the beginning and 92.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: 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: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 58 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 586.2s, OverallIterations: 54, TraceHistogramMax: 24, AutomataDifference: 387.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2980 SDtfs, 12188 SDslu, 29794 SDs, 0 SdLazy, 222080 SolverSat, 2118 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 151.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8515 GetRequests, 5203 SyntacticMatches, 26 SemanticMatches, 3286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47527 ImplicationChecksByTransitivity, 257.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=264occurred in iteration=53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 54 MinimizatonAttempts, 122 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 14.3s SatisfiabilityAnalysisTime, 165.7s InterpolantComputationTime, 12220 NumberOfCodeBlocks, 12021 NumberOfCodeBlocksAsserted, 396 NumberOfCheckSat, 12123 ConstructedInterpolants, 339 QuantifiedInterpolants, 20980688 SizeOfPredicates, 335 NumberOfNonLiveVariables, 19450 ConjunctsInSsa, 3498 ConjunctsInUnsatCore, 97 InterpolantComputations, 11 PerfectInterpolantSequences, 18678/86701 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...