./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.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_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 646417a8dd8807492175439f0c109786ec3887ae ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:46:25,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:46:25,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:46:25,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:46:25,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:46:25,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:46:25,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:46:25,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:46:25,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:46:25,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:46:25,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:46:25,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:46:25,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:46:25,665 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:46:25,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:46:25,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:46:25,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:46:25,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:46:25,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:46:25,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:46:25,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:46:25,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:46:25,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:46:25,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:46:25,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:46:25,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:46:25,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:46:25,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:46:25,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:46:25,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:46:25,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:46:25,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:46:25,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:46:25,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:46:25,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:46:25,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:46:25,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:46:25,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:46:25,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:46:25,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:46:25,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:46:25,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-29 22:46:25,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:46:25,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:46:25,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:46:25,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:46:25,762 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:46:25,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:46:25,762 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:46:25,762 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:46:25,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:46:25,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:46:25,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:46:25,764 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-29 22:46:25,765 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-29 22:46:25,765 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-29 22:46:25,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:46:25,765 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-29 22:46:25,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:46:25,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:46:25,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:46:25,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:46:25,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:46:25,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:46:25,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:46:25,767 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:46:25,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:46:25,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:46:25,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:46:25,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:46:25,769 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_83ab8d5f-126a-439c-9247-9950ffa9699f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 646417a8dd8807492175439f0c109786ec3887ae [2020-11-29 22:46:26,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:46:26,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:46:26,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:46:26,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:46:26,072 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:46:26,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2020-11-29 22:46:26,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/data/960d6c759/44896d5c4a74415a9eff9a547a87d4c3/FLAG087fe54d8 [2020-11-29 22:46:26,713 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:46:26,714 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/sv-benchmarks/c/array-memsafety/cstrspn-alloca-1.i [2020-11-29 22:46:26,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/data/960d6c759/44896d5c4a74415a9eff9a547a87d4c3/FLAG087fe54d8 [2020-11-29 22:46:27,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/data/960d6c759/44896d5c4a74415a9eff9a547a87d4c3 [2020-11-29 22:46:27,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:46:27,143 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-29 22:46:27,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:46:27,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:46:27,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:46:27,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253bc983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27, skipping insertion in model container [2020-11-29 22:46:27,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:46:27,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:46:27,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:46:27,526 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:46:27,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:46:27,611 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:46:27,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27 WrapperNode [2020-11-29 22:46:27,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:46:27,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:46:27,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:46:27,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:46:27,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:46:27,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:46:27,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:46:27,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:46:27,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:27,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-29 22:46:27,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:46:27,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-29 22:46:27,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-29 22:46:27,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-29 22:46:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-29 22:46:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-29 22:46:27,765 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrspn [2020-11-29 22:46:27,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-29 22:46:27,766 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-29 22:46:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-29 22:46:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-29 22:46:27,767 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-29 22:46:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-29 22:46:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-29 22:46:27,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-29 22:46:27,770 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-29 22:46:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-29 22:46:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-29 22:46:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-29 22:46:27,771 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-29 22:46:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-29 22:46:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-29 22:46:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-29 22:46:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-29 22:46:27,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-29 22:46:27,773 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-29 22:46:27,773 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-29 22:46:27,773 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-29 22:46:27,773 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-29 22:46:27,773 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-29 22:46:27,774 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-29 22:46:27,774 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-29 22:46:27,774 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-29 22:46:27,774 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-29 22:46:27,775 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-29 22:46:27,775 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-29 22:46:27,775 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-29 22:46:27,775 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-29 22:46:27,776 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-29 22:46:27,776 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-29 22:46:27,776 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-29 22:46:27,776 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-29 22:46:27,777 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-29 22:46:27,777 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-29 22:46:27,777 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-29 22:46:27,777 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-29 22:46:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-29 22:46:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-29 22:46:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-29 22:46:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-29 22:46:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-29 22:46:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-29 22:46:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-29 22:46:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-29 22:46:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-29 22:46:27,780 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-29 22:46:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-29 22:46:27,781 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-29 22:46:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-29 22:46:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-29 22:46:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-29 22:46:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-29 22:46:27,782 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-29 22:46:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-29 22:46:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-29 22:46:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-29 22:46:27,783 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-29 22:46:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-29 22:46:27,784 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-29 22:46:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-29 22:46:27,785 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-29 22:46:27,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-29 22:46:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-29 22:46:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-29 22:46:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-29 22:46:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-29 22:46:27,787 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-29 22:46:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-29 22:46:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-29 22:46:27,788 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-29 22:46:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-29 22:46:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-29 22:46:27,789 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-29 22:46:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-29 22:46:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-29 22:46:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-29 22:46:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-29 22:46:27,790 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-29 22:46:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-29 22:46:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-29 22:46:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-29 22:46:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-29 22:46:27,791 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-29 22:46:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-29 22:46:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-29 22:46:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-29 22:46:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-29 22:46:27,792 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-29 22:46:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-29 22:46:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-29 22:46:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-29 22:46:27,793 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-29 22:46:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-29 22:46:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-29 22:46:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-29 22:46:27,794 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-29 22:46:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-29 22:46:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-29 22:46:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-29 22:46:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-29 22:46:27,795 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-29 22:46:27,796 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-29 22:46:27,796 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-29 22:46:27,796 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-29 22:46:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-29 22:46:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-29 22:46:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-29 22:46:27,797 INFO L130 BoogieDeclarations]: Found specification of procedure cstrspn [2020-11-29 22:46:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 22:46:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-29 22:46:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:46:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:46:27,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:46:27,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-29 22:46:27,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:46:28,691 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:46:28,708 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 22:46:28,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:28 BoogieIcfgContainer [2020-11-29 22:46:28,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:46:28,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:46:28,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:46:28,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:46:28,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:46:27" (1/3) ... [2020-11-29 22:46:28,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a7622f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:46:28, skipping insertion in model container [2020-11-29 22:46:28,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (2/3) ... [2020-11-29 22:46:28,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25a7622f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:46:28, skipping insertion in model container [2020-11-29 22:46:28,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:28" (3/3) ... [2020-11-29 22:46:28,729 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrspn-alloca-1.i [2020-11-29 22:46:28,753 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:46:28,757 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-29 22:46:28,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-29 22:46:28,811 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:46:28,812 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-29 22:46:28,820 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:46:28,820 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:46:28,820 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:46:28,820 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:46:28,820 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:46:28,821 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:46:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-11-29 22:46:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:46:28,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:28,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:28,856 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2020-11-29 22:46:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:28,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381732346] [2020-11-29 22:46:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:29,128 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 22:46:29,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381732346] [2020-11-29 22:46:29,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:29,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:46:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182673491] [2020-11-29 22:46:29,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:29,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:29,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:29,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:29,150 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 5 states. [2020-11-29 22:46:29,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:29,582 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-11-29 22:46:29,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:46:29,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 22:46:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:29,594 INFO L225 Difference]: With dead ends: 83 [2020-11-29 22:46:29,595 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 22:46:29,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:46:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 22:46:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2020-11-29 22:46:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:46:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-11-29 22:46:29,658 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2020-11-29 22:46:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:29,658 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-11-29 22:46:29,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-11-29 22:46:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:46:29,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:29,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:29,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:46:29,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:29,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:29,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2020-11-29 22:46:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:29,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561586732] [2020-11-29 22:46:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:29,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:29,835 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 22:46:29,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561586732] [2020-11-29 22:46:29,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:29,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:29,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193538119] [2020-11-29 22:46:29,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:29,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:29,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:29,839 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 5 states. [2020-11-29 22:46:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:30,193 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2020-11-29 22:46:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:46:30,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-29 22:46:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:30,196 INFO L225 Difference]: With dead ends: 84 [2020-11-29 22:46:30,197 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 22:46:30,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 22:46:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2020-11-29 22:46:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-11-29 22:46:30,215 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2020-11-29 22:46:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:30,216 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-11-29 22:46:30,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-11-29 22:46:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:46:30,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:46:30,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2020-11-29 22:46:30,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58535541] [2020-11-29 22:46:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,293 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 22:46:30,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58535541] [2020-11-29 22:46:30,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:30,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:46:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831732734] [2020-11-29 22:46:30,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:46:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:46:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:46:30,296 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 4 states. [2020-11-29 22:46:30,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:30,426 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-11-29 22:46:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:46:30,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 22:46:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:30,427 INFO L225 Difference]: With dead ends: 62 [2020-11-29 22:46:30,427 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 22:46:30,428 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 22:46:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 22:46:30,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 22:46:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:46:30,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-11-29 22:46:30,434 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2020-11-29 22:46:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:30,434 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-11-29 22:46:30,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:46:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-11-29 22:46:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:30,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:46:30,435 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2020-11-29 22:46:30,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151639060] [2020-11-29 22:46:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,523 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 22:46:30,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151639060] [2020-11-29 22:46:30,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:30,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:30,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940471769] [2020-11-29 22:46:30,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:30,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:30,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:30,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:30,525 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 5 states. [2020-11-29 22:46:30,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:30,704 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-29 22:46:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:46:30,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 22:46:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:30,705 INFO L225 Difference]: With dead ends: 61 [2020-11-29 22:46:30,705 INFO L226 Difference]: Without dead ends: 61 [2020-11-29 22:46:30,706 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 22:46:30,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-29 22:46:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-11-29 22:46:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 22:46:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-11-29 22:46:30,711 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2020-11-29 22:46:30,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:30,714 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-11-29 22:46:30,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-11-29 22:46:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:30,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 22:46:30,715 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2020-11-29 22:46:30,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210104545] [2020-11-29 22:46:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,799 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 22:46:30,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210104545] [2020-11-29 22:46:30,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:30,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:46:30,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871442564] [2020-11-29 22:46:30,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:30,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:30,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:30,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:30,804 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 5 states. [2020-11-29 22:46:30,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:30,956 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2020-11-29 22:46:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:46:30,957 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 22:46:30,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:30,958 INFO L225 Difference]: With dead ends: 81 [2020-11-29 22:46:30,958 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 22:46:30,958 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 22:46:30,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 22:46:30,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-11-29 22:46:30,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:46:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-11-29 22:46:30,971 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2020-11-29 22:46:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:30,971 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-11-29 22:46:30,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:30,971 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-11-29 22:46:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:30,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 22:46:30,976 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2020-11-29 22:46:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415401523] [2020-11-29 22:46:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,050 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 22:46:31,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415401523] [2020-11-29 22:46:31,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:46:31,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187795388] [2020-11-29 22:46:31,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:46:31,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:46:31,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:46:31,053 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 4 states. [2020-11-29 22:46:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,219 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2020-11-29 22:46:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:46:31,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 22:46:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,220 INFO L225 Difference]: With dead ends: 70 [2020-11-29 22:46:31,221 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 22:46:31,221 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 22:46:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 22:46:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-29 22:46:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 22:46:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-11-29 22:46:31,227 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2020-11-29 22:46:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,228 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-11-29 22:46:31,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:46:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-11-29 22:46:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:31,229 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 22:46:31,229 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2020-11-29 22:46:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756618160] [2020-11-29 22:46:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,318 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 22:46:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756618160] [2020-11-29 22:46:31,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:46:31,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483349888] [2020-11-29 22:46:31,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:31,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:31,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,320 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 6 states. [2020-11-29 22:46:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,539 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-11-29 22:46:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:46:31,540 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-29 22:46:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,541 INFO L225 Difference]: With dead ends: 81 [2020-11-29 22:46:31,541 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 22:46:31,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:46:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 22:46:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2020-11-29 22:46:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:46:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2020-11-29 22:46:31,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2020-11-29 22:46:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,554 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2020-11-29 22:46:31,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2020-11-29 22:46:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:46:31,555 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 22:46:31,556 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2020-11-29 22:46:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066545536] [2020-11-29 22:46:31,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,659 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 22:46:31,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066545536] [2020-11-29 22:46:31,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:31,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168575748] [2020-11-29 22:46:31,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:31,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:31,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:31,661 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 5 states. [2020-11-29 22:46:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,797 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-11-29 22:46:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:46:31,798 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-29 22:46:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,799 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:46:31,799 INFO L226 Difference]: Without dead ends: 71 [2020-11-29 22:46:31,799 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 22:46:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-29 22:46:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-29 22:46:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 22:46:31,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-11-29 22:46:31,807 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2020-11-29 22:46:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,807 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-11-29 22:46:31,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:31,807 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-11-29 22:46:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:46:31,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,814 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 22:46:31,814 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2020-11-29 22:46:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393037347] [2020-11-29 22:46:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,953 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 22:46:31,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393037347] [2020-11-29 22:46:31,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416571942] [2020-11-29 22:46:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:46:32,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:32,204 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-11-29 22:46:32,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:46:32,227 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-29 22:46:32,228 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:32,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:32,260 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 10 treesize of output 8 [2020-11-29 22:46:32,265 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:32,278 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:32,280 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:32,281 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-29 22:46:32,325 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 22:46:32,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:32,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-29 22:46:32,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746659373] [2020-11-29 22:46:32,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:46:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:46:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:46:32,327 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 7 states. [2020-11-29 22:46:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:32,611 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-11-29 22:46:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:46:32,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-29 22:46:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:32,613 INFO L225 Difference]: With dead ends: 90 [2020-11-29 22:46:32,613 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:46:32,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 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 22:46:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:46:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2020-11-29 22:46:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 22:46:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-11-29 22:46:32,628 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2020-11-29 22:46:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:32,630 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-11-29 22:46:32,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:46:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-11-29 22:46:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:46:32,633 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:32,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:32,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-29 22:46:32,849 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:32,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:32,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736657, now seen corresponding path program 1 times [2020-11-29 22:46:32,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:32,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620509957] [2020-11-29 22:46:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:32,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:32,926 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 22:46:32,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620509957] [2020-11-29 22:46:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:32,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 22:46:32,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15560290] [2020-11-29 22:46:32,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:32,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:32,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:32,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:32,928 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 6 states. [2020-11-29 22:46:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:33,113 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-11-29 22:46:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:46:33,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-29 22:46:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:33,114 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:46:33,114 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:46:33,114 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 22:46:33,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:46:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-29 22:46:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-11-29 22:46:33,119 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2020-11-29 22:46:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:33,120 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-11-29 22:46:33,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-11-29 22:46:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:46:33,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:33,120 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:33,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 22:46:33,121 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736656, now seen corresponding path program 1 times [2020-11-29 22:46:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:33,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683614174] [2020-11-29 22:46:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,225 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 22:46:33,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683614174] [2020-11-29 22:46:33,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:33,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 22:46:33,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725854669] [2020-11-29 22:46:33,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:33,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:33,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:33,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:33,227 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 8 states. [2020-11-29 22:46:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:33,537 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-11-29 22:46:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:33,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-29 22:46:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:33,540 INFO L225 Difference]: With dead ends: 86 [2020-11-29 22:46:33,540 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 22:46:33,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:46:33,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 22:46:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2020-11-29 22:46:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 22:46:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-11-29 22:46:33,545 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2020-11-29 22:46:33,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:33,545 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-11-29 22:46:33,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-11-29 22:46:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:46:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:33,546 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:33,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 22:46:33,547 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:33,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:33,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2020-11-29 22:46:33,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:33,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739759900] [2020-11-29 22:46:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,663 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 22:46:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739759900] [2020-11-29 22:46:33,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053897201] [2020-11-29 22:46:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:46:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:33,841 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:33,841 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:46:33,842 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:33,868 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-29 22:46:33,870 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:33,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-29 22:46:33,903 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 22:46:33,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:33,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-29 22:46:33,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545918482] [2020-11-29 22:46:33,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:33,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:33,905 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 8 states. [2020-11-29 22:46:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:34,104 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-11-29 22:46:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:34,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-29 22:46:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:34,106 INFO L225 Difference]: With dead ends: 74 [2020-11-29 22:46:34,106 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:46:34,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:46:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-29 22:46:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-11-29 22:46:34,110 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2020-11-29 22:46:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:34,111 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-11-29 22:46:34,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-11-29 22:46:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:46:34,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:34,111 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] [2020-11-29 22:46:34,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 22:46:34,320 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 182222645, now seen corresponding path program 1 times [2020-11-29 22:46:34,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:34,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212579673] [2020-11-29 22:46:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,383 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 22:46:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212579673] [2020-11-29 22:46:34,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-29 22:46:34,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120346765] [2020-11-29 22:46:34,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:46:34,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:46:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:46:34,385 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 7 states. [2020-11-29 22:46:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:34,611 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-11-29 22:46:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:34,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-29 22:46:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:34,613 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:46:34,613 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:46:34,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:46:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-11-29 22:46:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 22:46:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-11-29 22:46:34,617 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2020-11-29 22:46:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:34,617 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-11-29 22:46:34,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:46:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-11-29 22:46:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:46:34,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:34,618 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] [2020-11-29 22:46:34,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 22:46:34,619 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:34,619 INFO L82 PathProgramCache]: Analyzing trace with hash 182222646, now seen corresponding path program 1 times [2020-11-29 22:46:34,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:34,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052299699] [2020-11-29 22:46:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,747 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 22:46:34,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052299699] [2020-11-29 22:46:34,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:34,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-29 22:46:34,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326904900] [2020-11-29 22:46:34,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:46:34,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:34,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:46:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:34,749 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 9 states. [2020-11-29 22:46:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:35,065 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-11-29 22:46:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:46:35,066 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-11-29 22:46:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:35,067 INFO L225 Difference]: With dead ends: 76 [2020-11-29 22:46:35,067 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 22:46:35,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 22:46:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-11-29 22:46:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 22:46:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-11-29 22:46:35,073 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2020-11-29 22:46:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:35,073 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-11-29 22:46:35,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:46:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-11-29 22:46:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:46:35,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:35,074 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] [2020-11-29 22:46:35,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 22:46:35,075 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -994936542, now seen corresponding path program 1 times [2020-11-29 22:46:35,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:35,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632451559] [2020-11-29 22:46:35,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 22:46:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,170 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 22:46:35,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632451559] [2020-11-29 22:46:35,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:35,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:35,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56503363] [2020-11-29 22:46:35,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:35,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:35,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:35,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:35,173 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 5 states. [2020-11-29 22:46:35,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:35,281 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-11-29 22:46:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:46:35,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-11-29 22:46:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:35,282 INFO L225 Difference]: With dead ends: 67 [2020-11-29 22:46:35,282 INFO L226 Difference]: Without dead ends: 62 [2020-11-29 22:46:35,282 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 22:46:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-29 22:46:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-11-29 22:46:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-29 22:46:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-11-29 22:46:35,285 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2020-11-29 22:46:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:35,285 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-11-29 22:46:35,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-11-29 22:46:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:46:35,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:35,286 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, 1] [2020-11-29 22:46:35,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-29 22:46:35,286 INFO L429 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:35,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1032720461, now seen corresponding path program 1 times [2020-11-29 22:46:35,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:35,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587687683] [2020-11-29 22:46:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:35,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,339 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 22:46:35,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587687683] [2020-11-29 22:46:35,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:35,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:35,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265627668] [2020-11-29 22:46:35,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:46:35,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:35,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:46:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:46:35,341 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-11-29 22:46:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:35,426 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2020-11-29 22:46:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:46:35,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-29 22:46:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:35,427 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:46:35,427 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:46:35,427 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 22:46:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:46:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-29 22:46:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:35,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-11-29 22:46:35,430 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2020-11-29 22:46:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:35,430 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-11-29 22:46:35,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:46:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-11-29 22:46:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 22:46:35,431 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:35,431 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, 1, 1, 1] [2020-11-29 22:46:35,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-29 22:46:35,432 INFO L429 AbstractCegarLoop]: === Iteration 17 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash 301059978, now seen corresponding path program 1 times [2020-11-29 22:46:35,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:35,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272588840] [2020-11-29 22:46:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:35,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272588840] [2020-11-29 22:46:35,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:35,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-11-29 22:46:35,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055680418] [2020-11-29 22:46:35,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:46:35,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:46:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:35,690 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 10 states. [2020-11-29 22:46:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:36,057 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2020-11-29 22:46:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:46:36,058 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-11-29 22:46:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:36,059 INFO L225 Difference]: With dead ends: 77 [2020-11-29 22:46:36,059 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 22:46:36,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:46:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 22:46:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-29 22:46:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 22:46:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2020-11-29 22:46:36,062 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2020-11-29 22:46:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:36,062 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2020-11-29 22:46:36,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:46:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2020-11-29 22:46:36,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 22:46:36,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:36,063 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, 1, 1, 1] [2020-11-29 22:46:36,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-29 22:46:36,064 INFO L429 AbstractCegarLoop]: === Iteration 18 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:36,064 INFO L82 PathProgramCache]: Analyzing trace with hash 723761804, now seen corresponding path program 1 times [2020-11-29 22:46:36,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:36,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218543102] [2020-11-29 22:46:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:36,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:36,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218543102] [2020-11-29 22:46:36,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:36,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 22:46:36,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042706610] [2020-11-29 22:46:36,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:46:36,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:46:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:46:36,361 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 11 states. [2020-11-29 22:46:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:36,683 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-11-29 22:46:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:36,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-29 22:46:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:36,684 INFO L225 Difference]: With dead ends: 80 [2020-11-29 22:46:36,684 INFO L226 Difference]: Without dead ends: 67 [2020-11-29 22:46:36,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-29 22:46:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2020-11-29 22:46:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 22:46:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-11-29 22:46:36,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2020-11-29 22:46:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:36,687 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-11-29 22:46:36,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:46:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-11-29 22:46:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 22:46:36,692 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:36,692 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:36,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-29 22:46:36,692 INFO L429 AbstractCegarLoop]: === Iteration 19 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash 63626319, now seen corresponding path program 1 times [2020-11-29 22:46:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:36,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709744702] [2020-11-29 22:46:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:36,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:36,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709744702] [2020-11-29 22:46:36,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:36,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 22:46:36,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587246293] [2020-11-29 22:46:36,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:46:36,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:46:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:46:36,887 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 11 states. [2020-11-29 22:46:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:37,327 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-11-29 22:46:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:46:37,327 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-11-29 22:46:37,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:37,328 INFO L225 Difference]: With dead ends: 81 [2020-11-29 22:46:37,328 INFO L226 Difference]: Without dead ends: 81 [2020-11-29 22:46:37,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:46:37,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-29 22:46:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-11-29 22:46:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 22:46:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-11-29 22:46:37,332 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2020-11-29 22:46:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:37,332 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-11-29 22:46:37,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:46:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-11-29 22:46:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-29 22:46:37,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:37,333 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:37,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-29 22:46:37,333 INFO L429 AbstractCegarLoop]: === Iteration 20 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash -70387187, now seen corresponding path program 1 times [2020-11-29 22:46:37,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:37,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065789962] [2020-11-29 22:46:37,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:37,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:37,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065789962] [2020-11-29 22:46:37,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:37,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-29 22:46:37,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417609112] [2020-11-29 22:46:37,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 22:46:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 22:46:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:37,555 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 13 states. [2020-11-29 22:46:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:38,052 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2020-11-29 22:46:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:46:38,056 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-11-29 22:46:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:38,057 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:46:38,057 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 22:46:38,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:46:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 22:46:38,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-11-29 22:46:38,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 22:46:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-11-29 22:46:38,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2020-11-29 22:46:38,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:38,061 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-11-29 22:46:38,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 22:46:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2020-11-29 22:46:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-29 22:46:38,062 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:38,062 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:38,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-29 22:46:38,063 INFO L429 AbstractCegarLoop]: === Iteration 21 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:38,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096765, now seen corresponding path program 1 times [2020-11-29 22:46:38,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:38,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998189680] [2020-11-29 22:46:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:38,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998189680] [2020-11-29 22:46:38,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:38,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-29 22:46:38,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063146263] [2020-11-29 22:46:38,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:46:38,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:46:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:46:38,187 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 11 states. [2020-11-29 22:46:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:38,613 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-11-29 22:46:38,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:46:38,614 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-11-29 22:46:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:38,615 INFO L225 Difference]: With dead ends: 81 [2020-11-29 22:46:38,615 INFO L226 Difference]: Without dead ends: 56 [2020-11-29 22:46:38,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:46:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-29 22:46:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-11-29 22:46:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 22:46:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-29 22:46:38,617 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2020-11-29 22:46:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:38,618 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-29 22:46:38,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:46:38,618 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-29 22:46:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:46:38,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:38,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:38,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-29 22:46:38,619 INFO L429 AbstractCegarLoop]: === Iteration 22 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1176807056, now seen corresponding path program 1 times [2020-11-29 22:46:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:38,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114128789] [2020-11-29 22:46:38,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:38,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114128789] [2020-11-29 22:46:38,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641138071] [2020-11-29 22:46:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 22:46:38,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:39,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:39,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-11-29 22:46:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168381494] [2020-11-29 22:46:39,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 22:46:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:39,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 22:46:39,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:46:39,112 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2020-11-29 22:46:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:39,682 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-11-29 22:46:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:39,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-11-29 22:46:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:39,683 INFO L225 Difference]: With dead ends: 76 [2020-11-29 22:46:39,683 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:46:39,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:46:39,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:46:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-11-29 22:46:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 22:46:39,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-11-29 22:46:39,686 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 35 [2020-11-29 22:46:39,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:39,686 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-11-29 22:46:39,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 22:46:39,687 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-11-29 22:46:39,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 22:46:39,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:39,687 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:39,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-29 22:46:39,896 INFO L429 AbstractCegarLoop]: === Iteration 23 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1560164987, now seen corresponding path program 1 times [2020-11-29 22:46:39,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:39,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350363387] [2020-11-29 22:46:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:40,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:40,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350363387] [2020-11-29 22:46:40,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382128858] [2020-11-29 22:46:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 22:46:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:40,217 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_34|]} [2020-11-29 22:46:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:46:40,235 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-29 22:46:40,235 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:40,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:40,273 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 10 treesize of output 8 [2020-11-29 22:46:40,274 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:40,296 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:40,301 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:40,301 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-29 22:46:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:40,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:40,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-29 22:46:40,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012302963] [2020-11-29 22:46:40,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:46:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:46:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:40,514 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 14 states. [2020-11-29 22:46:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:40,935 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2020-11-29 22:46:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:46:40,935 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-11-29 22:46:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:40,936 INFO L225 Difference]: With dead ends: 122 [2020-11-29 22:46:40,936 INFO L226 Difference]: Without dead ends: 122 [2020-11-29 22:46:40,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:46:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-29 22:46:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2020-11-29 22:46:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-29 22:46:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2020-11-29 22:46:40,939 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 38 [2020-11-29 22:46:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:40,939 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2020-11-29 22:46:40,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:46:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2020-11-29 22:46:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-29 22:46:40,939 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:40,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:41,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:41,140 INFO L429 AbstractCegarLoop]: === Iteration 24 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:41,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1664191332, now seen corresponding path program 2 times [2020-11-29 22:46:41,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:41,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766116701] [2020-11-29 22:46:41,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:41,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:41,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766116701] [2020-11-29 22:46:41,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499698064] [2020-11-29 22:46:41,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:41,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:41,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-29 22:46:41,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:41,753 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 22:46:41,753 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:41,770 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:41,772 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 22:46:41,772 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-11-29 22:46:42,082 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 22:46:42,084 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:42,086 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:42,086 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 22:46:42,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-11-29 22:46:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:42,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:42,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2020-11-29 22:46:42,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615758865] [2020-11-29 22:46:42,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:46:42,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:46:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:46:42,096 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 24 states. [2020-11-29 22:46:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:42,821 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2020-11-29 22:46:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:46:42,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2020-11-29 22:46:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:42,822 INFO L225 Difference]: With dead ends: 134 [2020-11-29 22:46:42,822 INFO L226 Difference]: Without dead ends: 128 [2020-11-29 22:46:42,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2020-11-29 22:46:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-29 22:46:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2020-11-29 22:46:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-11-29 22:46:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2020-11-29 22:46:42,827 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 41 [2020-11-29 22:46:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:42,827 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2020-11-29 22:46:42,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:46:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2020-11-29 22:46:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 22:46:42,828 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:42,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:43,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 22:46:43,044 INFO L429 AbstractCegarLoop]: === Iteration 25 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash 321433639, now seen corresponding path program 3 times [2020-11-29 22:46:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:43,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708948486] [2020-11-29 22:46:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:43,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:43,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:43,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708948486] [2020-11-29 22:46:43,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931592506] [2020-11-29 22:46:43,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:43,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 22:46:43,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:43,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 22:46:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:43,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:43,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-11-29 22:46:43,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413789820] [2020-11-29 22:46:43,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:46:43,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:43,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:46:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:46:43,609 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand 22 states. [2020-11-29 22:46:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:44,175 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2020-11-29 22:46:44,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:46:44,176 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-11-29 22:46:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:44,177 INFO L225 Difference]: With dead ends: 170 [2020-11-29 22:46:44,177 INFO L226 Difference]: Without dead ends: 168 [2020-11-29 22:46:44,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:46:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-11-29 22:46:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 135. [2020-11-29 22:46:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-11-29 22:46:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2020-11-29 22:46:44,183 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 45 [2020-11-29 22:46:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2020-11-29 22:46:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:46:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2020-11-29 22:46:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 22:46:44,184 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:44,185 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:44,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:44,397 INFO L429 AbstractCegarLoop]: === Iteration 26 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash -959683498, now seen corresponding path program 2 times [2020-11-29 22:46:44,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:44,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985364782] [2020-11-29 22:46:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:44,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:44,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985364782] [2020-11-29 22:46:44,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083099962] [2020-11-29 22:46:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-29 22:46:44,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:44,921 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 10 treesize of output 8 [2020-11-29 22:46:44,924 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:44,928 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:44,929 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:44,929 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-29 22:46:45,042 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:46:45,042 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:45,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:45,053 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 22:46:45,053 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 22:46:45,112 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:46:45,112 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:45,124 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:45,127 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:46:45,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-11-29 22:46:46,028 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:46,028 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 70 [2020-11-29 22:46:46,029 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:46,085 INFO L625 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2020-11-29 22:46:46,090 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:46,090 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:53, output treesize:8 [2020-11-29 22:46:46,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:46,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:46,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2020-11-29 22:46:46,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144519820] [2020-11-29 22:46:46,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-29 22:46:46,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-29 22:46:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:46:46,159 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand 28 states. [2020-11-29 22:46:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:47,533 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2020-11-29 22:46:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:46:47,533 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 51 [2020-11-29 22:46:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:47,534 INFO L225 Difference]: With dead ends: 214 [2020-11-29 22:46:47,534 INFO L226 Difference]: Without dead ends: 190 [2020-11-29 22:46:47,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:46:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-29 22:46:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 181. [2020-11-29 22:46:47,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-11-29 22:46:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 205 transitions. [2020-11-29 22:46:47,540 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 205 transitions. Word has length 51 [2020-11-29 22:46:47,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:47,540 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 205 transitions. [2020-11-29 22:46:47,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-29 22:46:47,540 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 205 transitions. [2020-11-29 22:46:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-29 22:46:47,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:47,542 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:47,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 22:46:47,752 INFO L429 AbstractCegarLoop]: === Iteration 27 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1458059333, now seen corresponding path program 4 times [2020-11-29 22:46:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004673028] [2020-11-29 22:46:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:48,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:48,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004673028] [2020-11-29 22:46:48,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261958799] [2020-11-29 22:46:48,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:48,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:48,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 22:46:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:48,310 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:48,311 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:46:48,311 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:48,335 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-29 22:46:48,337 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:48,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-29 22:46:48,564 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 22:46:48,564 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:48,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:48,573 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:48,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-11-29 22:46:48,857 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 22:46:48,858 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 22:46:48,870 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:48,875 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:46:48,877 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:48,878 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 22:46:48,878 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:48,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:48,889 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 22:46:48,889 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-11-29 22:46:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:48,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:48,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2020-11-29 22:46:48,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559902342] [2020-11-29 22:46:48,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-29 22:46:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-29 22:46:48,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2020-11-29 22:46:48,901 INFO L87 Difference]: Start difference. First operand 181 states and 205 transitions. Second operand 32 states. [2020-11-29 22:46:50,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:50,856 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2020-11-29 22:46:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 22:46:50,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 51 [2020-11-29 22:46:50,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:50,858 INFO L225 Difference]: With dead ends: 284 [2020-11-29 22:46:50,859 INFO L226 Difference]: Without dead ends: 255 [2020-11-29 22:46:50,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=462, Invalid=3698, Unknown=0, NotChecked=0, Total=4160 [2020-11-29 22:46:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-11-29 22:46:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2020-11-29 22:46:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-29 22:46:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 263 transitions. [2020-11-29 22:46:50,867 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 263 transitions. Word has length 51 [2020-11-29 22:46:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:50,868 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 263 transitions. [2020-11-29 22:46:50,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-29 22:46:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 263 transitions. [2020-11-29 22:46:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 22:46:50,868 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:50,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:51,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 22:46:51,069 INFO L429 AbstractCegarLoop]: === Iteration 28 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:51,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:51,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1549396802, now seen corresponding path program 5 times [2020-11-29 22:46:51,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:51,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19517550] [2020-11-29 22:46:51,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:51,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:51,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19517550] [2020-11-29 22:46:51,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57086923] [2020-11-29 22:46:51,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:51,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 22:46:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:51,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 22:46:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:51,505 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:51,506 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:46:51,506 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:51,528 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-29 22:46:51,530 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:51,530 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-29 22:46:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:51,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:51,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2020-11-29 22:46:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210015750] [2020-11-29 22:46:51,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:46:51,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:46:51,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:46:51,649 INFO L87 Difference]: Start difference. First operand 234 states and 263 transitions. Second operand 18 states. [2020-11-29 22:46:52,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:52,289 INFO L93 Difference]: Finished difference Result 298 states and 330 transitions. [2020-11-29 22:46:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:46:52,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2020-11-29 22:46:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:52,291 INFO L225 Difference]: With dead ends: 298 [2020-11-29 22:46:52,291 INFO L226 Difference]: Without dead ends: 296 [2020-11-29 22:46:52,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:46:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-11-29 22:46:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 252. [2020-11-29 22:46:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-29 22:46:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2020-11-29 22:46:52,300 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 55 [2020-11-29 22:46:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:52,300 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2020-11-29 22:46:52,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:46:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2020-11-29 22:46:52,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 22:46:52,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:52,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:52,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-29 22:46:52,525 INFO L429 AbstractCegarLoop]: === Iteration 29 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:52,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1293443559, now seen corresponding path program 3 times [2020-11-29 22:46:52,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:52,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356810674] [2020-11-29 22:46:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:52,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356810674] [2020-11-29 22:46:52,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115053595] [2020-11-29 22:46:52,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:52,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 22:46:52,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:52,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 22:46:52,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:53,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:53,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2020-11-29 22:46:53,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255307494] [2020-11-29 22:46:53,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:46:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:46:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:46:53,029 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand 20 states. [2020-11-29 22:46:53,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:53,873 INFO L93 Difference]: Finished difference Result 403 states and 442 transitions. [2020-11-29 22:46:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:53,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-11-29 22:46:53,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:53,876 INFO L225 Difference]: With dead ends: 403 [2020-11-29 22:46:53,876 INFO L226 Difference]: Without dead ends: 403 [2020-11-29 22:46:53,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:46:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-11-29 22:46:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2020-11-29 22:46:53,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-11-29 22:46:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 363 transitions. [2020-11-29 22:46:53,889 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 363 transitions. Word has length 55 [2020-11-29 22:46:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:53,889 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 363 transitions. [2020-11-29 22:46:53,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:46:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 363 transitions. [2020-11-29 22:46:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-29 22:46:53,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:53,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:54,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 22:46:54,113 INFO L429 AbstractCegarLoop]: === Iteration 30 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:54,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:54,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1254563602, now seen corresponding path program 6 times [2020-11-29 22:46:54,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:54,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877875495] [2020-11-29 22:46:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:54,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:46:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:46:54,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877875495] [2020-11-29 22:46:54,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059390269] [2020-11-29 22:46:54,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:46:54,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 22:46:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 22:46:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:54,606 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:54,607 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:46:54,607 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:54,623 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-29 22:46:54,624 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:46:54,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-29 22:46:54,675 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 22:46:54,676 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:46:54,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:54,697 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 22:46:54,698 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-11-29 22:46:54,969 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:54,970 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 22:46:54,970 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 22:46:54,984 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:46:54,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:46:54,994 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-11-29 22:46:54,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-11-29 22:46:55,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:55,082 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-29 22:46:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-11-29 22:46:55,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:55,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 29 [2020-11-29 22:46:55,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830276182] [2020-11-29 22:46:55,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 22:46:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 22:46:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:46:55,325 INFO L87 Difference]: Start difference. First operand 322 states and 363 transitions. Second operand 29 states. [2020-11-29 22:46:57,728 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-11-29 22:46:58,466 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-11-29 22:46:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:59,152 INFO L93 Difference]: Finished difference Result 519 states and 558 transitions. [2020-11-29 22:46:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-29 22:46:59,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2020-11-29 22:46:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:59,154 INFO L225 Difference]: With dead ends: 519 [2020-11-29 22:46:59,154 INFO L226 Difference]: Without dead ends: 419 [2020-11-29 22:46:59,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=660, Invalid=4170, Unknown=0, NotChecked=0, Total=4830 [2020-11-29 22:46:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-11-29 22:46:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 276. [2020-11-29 22:46:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-29 22:46:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 299 transitions. [2020-11-29 22:46:59,165 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 299 transitions. Word has length 61 [2020-11-29 22:46:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:59,166 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 299 transitions. [2020-11-29 22:46:59,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 22:46:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 299 transitions. [2020-11-29 22:46:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-11-29 22:46:59,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:59,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:59,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:59,380 INFO L429 AbstractCegarLoop]: === Iteration 31 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:46:59,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:59,380 INFO L82 PathProgramCache]: Analyzing trace with hash 694033474, now seen corresponding path program 4 times [2020-11-29 22:46:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:59,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775828032] [2020-11-29 22:46:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:00,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:47:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:00,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:00,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775828032] [2020-11-29 22:47:00,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952295845] [2020-11-29 22:47:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:47:00,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:47:00,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 22:47:00,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:00,511 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:00,511 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:47:00,512 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:00,531 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-29 22:47:00,531 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:47:00,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:21 [2020-11-29 22:47:00,878 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:00,887 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 13 treesize of output 9 [2020-11-29 22:47:00,887 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:00,892 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 22:47:00,892 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:00,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:00,911 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 2 xjuncts. [2020-11-29 22:47:00,912 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:58, output treesize:50 [2020-11-29 22:47:00,986 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-29 22:47:00,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:01,008 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:01,008 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 57 [2020-11-29 22:47:01,009 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:01,073 INFO L625 ElimStorePlain]: treesize reduction 32, result has 68.3 percent of original size [2020-11-29 22:47:01,101 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:01,101 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 73 [2020-11-29 22:47:01,102 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:01,177 INFO L625 ElimStorePlain]: treesize reduction 46, result has 58.6 percent of original size [2020-11-29 22:47:01,178 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-11-29 22:47:01,178 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:73, output treesize:65 [2020-11-29 22:47:05,763 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-29 22:47:09,929 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-29 22:47:14,079 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-29 22:47:16,207 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-29 22:47:16,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:18,414 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-11-29 22:47:18,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:18,765 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2020-11-29 22:47:18,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:18,779 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 13 treesize of output 9 [2020-11-29 22:47:18,780 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:18,787 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:18,787 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 39 [2020-11-29 22:47:18,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:18,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:18,790 INFO L545 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:47:18,825 INFO L625 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2020-11-29 22:47:18,827 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:47:18,827 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:73, output treesize:38 [2020-11-29 22:47:19,711 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:47:19,727 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:47:19,727 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2020-11-29 22:47:19,728 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:47:19,774 INFO L625 ElimStorePlain]: treesize reduction 6, result has 88.7 percent of original size [2020-11-29 22:47:19,778 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:47:19,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:60, output treesize:8 [2020-11-29 22:47:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:19,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:19,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 49 [2020-11-29 22:47:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373930287] [2020-11-29 22:47:19,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-29 22:47:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-29 22:47:19,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2229, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:47:19,881 INFO L87 Difference]: Start difference. First operand 276 states and 299 transitions. Second operand 49 states. [2020-11-29 22:47:21,494 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-11-29 22:47:25,602 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-11-29 22:47:33,205 WARN L193 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-11-29 22:47:43,222 WARN L193 SmtUtils]: Spent 9.19 s on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-11-29 22:47:54,501 WARN L193 SmtUtils]: Spent 11.18 s on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-11-29 22:48:11,997 WARN L193 SmtUtils]: Spent 15.29 s on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-11-29 22:48:26,849 WARN L193 SmtUtils]: Spent 14.72 s on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2020-11-29 22:48:32,419 WARN L193 SmtUtils]: Spent 3.45 s on a formula simplification that was a NOOP. DAG size: 73 [2020-11-29 22:48:36,255 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification that was a NOOP. DAG size: 77 [2020-11-29 22:48:39,913 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification that was a NOOP. DAG size: 77 [2020-11-29 22:48:42,645 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2020-11-29 22:48:50,904 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-11-29 22:48:54,907 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-11-29 22:49:06,729 WARN L193 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-11-29 22:49:12,493 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 92 DAG size of output: 77 [2020-11-29 22:49:18,517 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-29 22:49:39,444 WARN L193 SmtUtils]: Spent 15.39 s on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-11-29 22:49:51,285 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-11-29 22:49:59,244 WARN L193 SmtUtils]: Spent 4.38 s on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2020-11-29 22:49:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:49:59,309 INFO L93 Difference]: Finished difference Result 352 states and 379 transitions. [2020-11-29 22:49:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 22:49:59,316 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 68 [2020-11-29 22:49:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:49:59,318 INFO L225 Difference]: With dead ends: 352 [2020-11-29 22:49:59,318 INFO L226 Difference]: Without dead ends: 310 [2020-11-29 22:49:59,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 165.1s TimeCoverageRelationStatistics Valid=540, Invalid=6089, Unknown=13, NotChecked=0, Total=6642 [2020-11-29 22:49:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-29 22:49:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2020-11-29 22:49:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-11-29 22:49:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 310 transitions. [2020-11-29 22:49:59,329 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 310 transitions. Word has length 68 [2020-11-29 22:49:59,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:49:59,329 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 310 transitions. [2020-11-29 22:49:59,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-29 22:49:59,329 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 310 transitions. [2020-11-29 22:49:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-29 22:49:59,331 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:49:59,331 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:49:59,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:49:59,547 INFO L429 AbstractCegarLoop]: === Iteration 32 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:49:59,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:49:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash -17730145, now seen corresponding path program 5 times [2020-11-29 22:49:59,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:49:59,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281985153] [2020-11-29 22:49:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:49:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:00,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:50:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 22:50:00,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281985153] [2020-11-29 22:50:00,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983310949] [2020-11-29 22:50:00,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:50:00,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 22:50:00,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:50:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 22:50:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:50:00,379 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 10 treesize of output 8 [2020-11-29 22:50:00,380 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:00,385 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:00,386 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:50:00,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-29 22:50:00,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:50:00,617 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:00,627 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:00,627 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 22:50:00,628 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 22:50:00,714 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:50:00,715 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:00,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:00,729 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 22:50:00,729 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-11-29 22:50:01,471 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:01,472 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-11-29 22:50:01,472 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 22:50:01,488 INFO L625 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2020-11-29 22:50:01,489 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:50:01,490 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-11-29 22:50:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 22:50:01,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:50:01,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2020-11-29 22:50:01,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315380997] [2020-11-29 22:50:01,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-29 22:50:01,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:50:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-29 22:50:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:50:01,554 INFO L87 Difference]: Start difference. First operand 286 states and 310 transitions. Second operand 37 states. [2020-11-29 22:50:03,854 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-11-29 22:50:04,499 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-29 22:50:04,988 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-11-29 22:50:05,243 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-11-29 22:50:05,605 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-11-29 22:50:05,982 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-11-29 22:50:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:50:06,028 INFO L93 Difference]: Finished difference Result 511 states and 545 transitions. [2020-11-29 22:50:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:50:06,028 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-11-29 22:50:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:50:06,029 INFO L225 Difference]: With dead ends: 511 [2020-11-29 22:50:06,029 INFO L226 Difference]: Without dead ends: 283 [2020-11-29 22:50:06,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=265, Invalid=2705, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 22:50:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-11-29 22:50:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-11-29 22:50:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-11-29 22:50:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2020-11-29 22:50:06,038 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 72 [2020-11-29 22:50:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:50:06,038 INFO L481 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2020-11-29 22:50:06,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-29 22:50:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2020-11-29 22:50:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-29 22:50:06,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:50:06,040 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:50:06,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-29 22:50:06,253 INFO L429 AbstractCegarLoop]: === Iteration 33 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:50:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:50:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash -853851937, now seen corresponding path program 6 times [2020-11-29 22:50:06,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:50:06,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136695940] [2020-11-29 22:50:06,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:50:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:06,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:50:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:50:06,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136695940] [2020-11-29 22:50:06,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761814221] [2020-11-29 22:50:06,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:50:06,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 22:50:06,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:50:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-29 22:50:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:50:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:50:06,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:50:06,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-11-29 22:50:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466211044] [2020-11-29 22:50:06,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:50:06,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:50:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:50:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:50:06,936 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 20 states. [2020-11-29 22:50:07,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:50:07,819 INFO L93 Difference]: Finished difference Result 408 states and 439 transitions. [2020-11-29 22:50:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:50:07,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 72 [2020-11-29 22:50:07,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:50:07,821 INFO L225 Difference]: With dead ends: 408 [2020-11-29 22:50:07,822 INFO L226 Difference]: Without dead ends: 408 [2020-11-29 22:50:07,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-11-29 22:50:07,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-11-29 22:50:07,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 350. [2020-11-29 22:50:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-11-29 22:50:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 377 transitions. [2020-11-29 22:50:07,831 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 377 transitions. Word has length 72 [2020-11-29 22:50:07,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:50:07,831 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 377 transitions. [2020-11-29 22:50:07,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:50:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 377 transitions. [2020-11-29 22:50:07,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-29 22:50:07,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:50:07,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:50:08,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:50:08,052 INFO L429 AbstractCegarLoop]: === Iteration 34 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:50:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:50:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2060735684, now seen corresponding path program 7 times [2020-11-29 22:50:08,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:50:08,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454888282] [2020-11-29 22:50:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:50:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:08,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:50:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:50:08,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454888282] [2020-11-29 22:50:08,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373136543] [2020-11-29 22:50:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:50:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:50:08,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-29 22:50:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:50:08,875 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:08,875 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:50:08,875 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:08,896 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-29 22:50:08,897 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:50:08,897 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-11-29 22:50:09,400 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 22:50:09,400 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:09,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:09,417 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 22:50:09,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-11-29 22:50:09,539 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:09,540 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 69 [2020-11-29 22:50:09,540 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:09,584 INFO L625 ElimStorePlain]: treesize reduction 43, result has 46.3 percent of original size [2020-11-29 22:50:09,585 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 22:50:09,585 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:37 [2020-11-29 22:50:10,393 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:10,393 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2020-11-29 22:50:10,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:50:10,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:50:10,399 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:50:10,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:50:10,401 INFO L545 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:50:10,447 INFO L625 ElimStorePlain]: treesize reduction 4, result has 91.3 percent of original size [2020-11-29 22:50:10,449 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:50:10,450 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:37 [2020-11-29 22:50:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:50:11,555 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:50:11,555 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2020-11-29 22:50:11,556 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:50:11,626 INFO L625 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2020-11-29 22:50:11,630 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:50:11,630 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:59, output treesize:8 [2020-11-29 22:50:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:50:11,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:50:11,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2020-11-29 22:50:11,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101025462] [2020-11-29 22:50:11,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-29 22:50:11,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:50:11,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-29 22:50:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2243, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:50:11,793 INFO L87 Difference]: Start difference. First operand 350 states and 377 transitions. Second operand 49 states. [2020-11-29 22:50:13,868 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-29 22:50:15,330 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-11-29 22:50:21,974 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-11-29 22:50:26,219 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-11-29 22:50:51,200 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-11-29 22:50:53,857 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-11-29 22:51:08,473 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-11-29 22:51:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:08,829 INFO L93 Difference]: Finished difference Result 879 states and 941 transitions. [2020-11-29 22:51:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-29 22:51:08,830 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 85 [2020-11-29 22:51:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:08,833 INFO L225 Difference]: With dead ends: 879 [2020-11-29 22:51:08,833 INFO L226 Difference]: Without dead ends: 818 [2020-11-29 22:51:08,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=638, Invalid=8281, Unknown=11, NotChecked=0, Total=8930 [2020-11-29 22:51:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2020-11-29 22:51:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 567. [2020-11-29 22:51:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2020-11-29 22:51:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 609 transitions. [2020-11-29 22:51:08,852 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 609 transitions. Word has length 85 [2020-11-29 22:51:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:08,853 INFO L481 AbstractCegarLoop]: Abstraction has 567 states and 609 transitions. [2020-11-29 22:51:08,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-29 22:51:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 609 transitions. [2020-11-29 22:51:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-11-29 22:51:08,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:08,855 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:09,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-29 22:51:09,068 INFO L429 AbstractCegarLoop]: === Iteration 35 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:51:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1146270783, now seen corresponding path program 8 times [2020-11-29 22:51:09,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:09,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886030765] [2020-11-29 22:51:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:09,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:51:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:51:09,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886030765] [2020-11-29 22:51:09,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008887378] [2020-11-29 22:51:09,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:51:09,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:51:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:09,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-29 22:51:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:51:09,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:09,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2020-11-29 22:51:09,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751912313] [2020-11-29 22:51:09,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:51:09,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:09,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:51:09,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:51:09,828 INFO L87 Difference]: Start difference. First operand 567 states and 609 transitions. Second operand 24 states. [2020-11-29 22:51:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:11,056 INFO L93 Difference]: Finished difference Result 910 states and 978 transitions. [2020-11-29 22:51:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:51:11,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 89 [2020-11-29 22:51:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:11,062 INFO L225 Difference]: With dead ends: 910 [2020-11-29 22:51:11,062 INFO L226 Difference]: Without dead ends: 910 [2020-11-29 22:51:11,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2020-11-29 22:51:11,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2020-11-29 22:51:11,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 637. [2020-11-29 22:51:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-11-29 22:51:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 683 transitions. [2020-11-29 22:51:11,080 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 683 transitions. Word has length 89 [2020-11-29 22:51:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:11,080 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 683 transitions. [2020-11-29 22:51:11,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:51:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 683 transitions. [2020-11-29 22:51:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-11-29 22:51:11,083 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:11,083 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:11,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:51:11,298 INFO L429 AbstractCegarLoop]: === Iteration 36 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:51:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash 494816939, now seen corresponding path program 1 times [2020-11-29 22:51:11,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:11,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512820698] [2020-11-29 22:51:11,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:11,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:51:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 22:51:12,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512820698] [2020-11-29 22:51:12,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905505149] [2020-11-29 22:51:12,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:51:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-29 22:51:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:12,182 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:12,183 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:51:12,183 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:12,206 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-29 22:51:12,206 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:12,206 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:21 [2020-11-29 22:51:12,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:51:12,789 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:12,789 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2020-11-29 22:51:12,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:51:12,791 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:51:12,791 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 22:51:12,797 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:51:12,797 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:12,837 INFO L625 ElimStorePlain]: treesize reduction 40, result has 45.9 percent of original size [2020-11-29 22:51:12,844 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:51:12,844 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:12,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:12,857 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:51:12,857 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:84, output treesize:30 [2020-11-29 22:51:12,925 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:51:12,926 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:12,941 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:12,942 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:51:12,943 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:40 [2020-11-29 22:51:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:51:13,701 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-11-29 22:51:13,702 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:13,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:13,723 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:13,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:47, output treesize:3 [2020-11-29 22:51:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 22:51:13,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:13,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 39 [2020-11-29 22:51:13,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573581254] [2020-11-29 22:51:13,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-29 22:51:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:13,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-29 22:51:13,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:51:13,826 INFO L87 Difference]: Start difference. First operand 637 states and 683 transitions. Second operand 39 states. [2020-11-29 22:51:20,490 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 56 [2020-11-29 22:51:24,880 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 56 [2020-11-29 22:51:33,406 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-11-29 22:51:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:33,444 INFO L93 Difference]: Finished difference Result 769 states and 819 transitions. [2020-11-29 22:51:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 22:51:33,445 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 95 [2020-11-29 22:51:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:33,447 INFO L225 Difference]: With dead ends: 769 [2020-11-29 22:51:33,447 INFO L226 Difference]: Without dead ends: 427 [2020-11-29 22:51:33,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=403, Invalid=3885, Unknown=2, NotChecked=0, Total=4290 [2020-11-29 22:51:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-11-29 22:51:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-11-29 22:51:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-11-29 22:51:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 455 transitions. [2020-11-29 22:51:33,457 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 455 transitions. Word has length 95 [2020-11-29 22:51:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:33,458 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 455 transitions. [2020-11-29 22:51:33,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-29 22:51:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 455 transitions. [2020-11-29 22:51:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-11-29 22:51:33,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:33,460 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:33,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-29 22:51:33,688 INFO L429 AbstractCegarLoop]: === Iteration 37 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:51:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash 336770012, now seen corresponding path program 9 times [2020-11-29 22:51:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:33,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124109668] [2020-11-29 22:51:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:34,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:51:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:51:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124109668] [2020-11-29 22:51:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985929183] [2020-11-29 22:51:34,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:51:34,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 22:51:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:34,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 65 conjunts are in the unsatisfiable core [2020-11-29 22:51:34,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:34,806 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 10 treesize of output 8 [2020-11-29 22:51:34,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:34,811 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:34,811 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:34,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-29 22:51:35,110 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:51:35,110 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:35,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:35,119 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 22:51:35,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 22:51:35,193 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:51:35,194 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:35,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:35,210 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 22:51:35,210 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-11-29 22:51:38,544 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-29 22:51:38,698 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:38,699 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 39 [2020-11-29 22:51:38,699 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:38,728 INFO L625 ElimStorePlain]: treesize reduction 12, result has 67.6 percent of original size [2020-11-29 22:51:38,730 INFO L545 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:38,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:53, output treesize:8 [2020-11-29 22:51:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:51:38,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:51:38,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2020-11-29 22:51:38,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747190750] [2020-11-29 22:51:38,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-11-29 22:51:38,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:51:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-11-29 22:51:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2334, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 22:51:38,872 INFO L87 Difference]: Start difference. First operand 424 states and 455 transitions. Second operand 50 states. [2020-11-29 22:51:44,854 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-29 22:51:45,721 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-11-29 22:51:45,991 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-11-29 22:51:46,252 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-11-29 22:51:46,547 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-29 22:51:47,163 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-29 22:51:47,526 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-29 22:51:47,789 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-11-29 22:51:47,996 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-29 22:51:48,232 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-11-29 22:51:48,443 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-11-29 22:51:52,290 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-11-29 22:51:56,252 WARN L193 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-11-29 22:51:56,507 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-29 22:51:56,782 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-11-29 22:51:57,032 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-11-29 22:51:57,295 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-11-29 22:51:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:51:57,297 INFO L93 Difference]: Finished difference Result 1054 states and 1120 transitions. [2020-11-29 22:51:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-29 22:51:57,297 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 102 [2020-11-29 22:51:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:51:57,298 INFO L225 Difference]: With dead ends: 1054 [2020-11-29 22:51:57,298 INFO L226 Difference]: Without dead ends: 431 [2020-11-29 22:51:57,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=612, Invalid=7044, Unknown=0, NotChecked=0, Total=7656 [2020-11-29 22:51:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-11-29 22:51:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 428. [2020-11-29 22:51:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-11-29 22:51:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 459 transitions. [2020-11-29 22:51:57,310 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 459 transitions. Word has length 102 [2020-11-29 22:51:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:51:57,310 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 459 transitions. [2020-11-29 22:51:57,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-11-29 22:51:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 459 transitions. [2020-11-29 22:51:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-11-29 22:51:57,312 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:51:57,312 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:51:57,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 22:51:57,520 INFO L429 AbstractCegarLoop]: === Iteration 38 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:51:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:51:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash 376729913, now seen corresponding path program 10 times [2020-11-29 22:51:57,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:51:57,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745962603] [2020-11-29 22:51:57,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:51:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:51:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:51:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:51:57,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745962603] [2020-11-29 22:51:57,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390492292] [2020-11-29 22:51:57,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:51:58,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:51:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:51:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 62 conjunts are in the unsatisfiable core [2020-11-29 22:51:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:51:58,120 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_38|]} [2020-11-29 22:51:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:51:58,126 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-29 22:51:58,127 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,141 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:58,147 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 10 treesize of output 8 [2020-11-29 22:51:58,148 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,163 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:58,163 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,163 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-11-29 22:51:58,464 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-11-29 22:51:58,464 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,489 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:58,489 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,489 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2020-11-29 22:51:58,552 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2020-11-29 22:51:58,553 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:51:58,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:51:58,564 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:51:58,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:39 [2020-11-29 22:52:01,702 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-29 22:52:01,842 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:01,843 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2020-11-29 22:52:01,843 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:01,925 INFO L625 ElimStorePlain]: treesize reduction 6, result has 92.2 percent of original size [2020-11-29 22:52:01,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:52:01,930 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:01,930 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:61, output treesize:28 [2020-11-29 22:52:02,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:52:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 32 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:02,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:02,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 39 [2020-11-29 22:52:02,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538260494] [2020-11-29 22:52:02,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-29 22:52:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-29 22:52:02,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 22:52:02,218 INFO L87 Difference]: Start difference. First operand 428 states and 459 transitions. Second operand 40 states. [2020-11-29 22:52:03,331 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-11-29 22:52:04,038 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-11-29 22:52:05,140 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-11-29 22:52:05,435 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-29 22:52:05,655 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-29 22:52:05,857 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-29 22:52:10,285 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-11-29 22:52:10,569 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-11-29 22:52:10,858 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-11-29 22:52:11,432 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-11-29 22:52:11,671 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-11-29 22:52:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:12,913 INFO L93 Difference]: Finished difference Result 556 states and 595 transitions. [2020-11-29 22:52:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 22:52:12,913 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-11-29 22:52:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:12,915 INFO L225 Difference]: With dead ends: 556 [2020-11-29 22:52:12,916 INFO L226 Difference]: Without dead ends: 556 [2020-11-29 22:52:12,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=363, Invalid=3297, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 22:52:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-11-29 22:52:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 498. [2020-11-29 22:52:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498 states. [2020-11-29 22:52:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 533 transitions. [2020-11-29 22:52:12,927 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 533 transitions. Word has length 106 [2020-11-29 22:52:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:12,928 INFO L481 AbstractCegarLoop]: Abstraction has 498 states and 533 transitions. [2020-11-29 22:52:12,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-29 22:52:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 533 transitions. [2020-11-29 22:52:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-11-29 22:52:12,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:12,930 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:13,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 22:52:13,153 INFO L429 AbstractCegarLoop]: === Iteration 39 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:52:13,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:13,153 INFO L82 PathProgramCache]: Analyzing trace with hash -231121630, now seen corresponding path program 11 times [2020-11-29 22:52:13,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:13,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617031530] [2020-11-29 22:52:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:14,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:52:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617031530] [2020-11-29 22:52:14,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792253016] [2020-11-29 22:52:14,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:52:14,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 22:52:14,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:14,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 94 conjunts are in the unsatisfiable core [2020-11-29 22:52:14,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:14,497 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 10 treesize of output 8 [2020-11-29 22:52:14,506 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:14,511 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:14,511 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:14,511 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-29 22:52:14,914 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:52:14,914 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:14,923 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:14,923 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 22:52:14,924 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 22:52:15,015 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:52:15,015 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:15,026 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:15,027 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 22:52:15,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:31 [2020-11-29 22:52:17,558 INFO L350 Elim1Store]: treesize reduction 10, result has 78.3 percent of original size [2020-11-29 22:52:17,558 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 55 [2020-11-29 22:52:17,558 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:17,593 INFO L625 ElimStorePlain]: treesize reduction 25, result has 50.0 percent of original size [2020-11-29 22:52:17,595 INFO L545 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:17,596 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:68, output treesize:8 [2020-11-29 22:52:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:17,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2020-11-29 22:52:17,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466485077] [2020-11-29 22:52:17,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-29 22:52:17,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:17,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-29 22:52:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3035, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 22:52:17,784 INFO L87 Difference]: Start difference. First operand 498 states and 533 transitions. Second operand 57 states. [2020-11-29 22:52:20,827 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-29 22:52:21,045 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-11-29 22:52:21,620 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-11-29 22:52:21,834 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-11-29 22:52:24,759 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-11-29 22:52:25,021 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-29 22:52:25,294 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-29 22:52:25,905 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2020-11-29 22:52:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:26,315 INFO L93 Difference]: Finished difference Result 1224 states and 1306 transitions. [2020-11-29 22:52:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-29 22:52:26,316 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 119 [2020-11-29 22:52:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:26,320 INFO L225 Difference]: With dead ends: 1224 [2020-11-29 22:52:26,320 INFO L226 Difference]: Without dead ends: 1137 [2020-11-29 22:52:26,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=386, Invalid=5620, Unknown=0, NotChecked=0, Total=6006 [2020-11-29 22:52:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2020-11-29 22:52:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 829. [2020-11-29 22:52:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 829 states. [2020-11-29 22:52:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 887 transitions. [2020-11-29 22:52:26,342 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 887 transitions. Word has length 119 [2020-11-29 22:52:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:26,343 INFO L481 AbstractCegarLoop]: Abstraction has 829 states and 887 transitions. [2020-11-29 22:52:26,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-29 22:52:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 887 transitions. [2020-11-29 22:52:26,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-11-29 22:52:26,346 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:26,346 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:26,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 22:52:26,565 INFO L429 AbstractCegarLoop]: === Iteration 40 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:52:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -85432987, now seen corresponding path program 12 times [2020-11-29 22:52:26,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:26,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42570575] [2020-11-29 22:52:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:52:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:27,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42570575] [2020-11-29 22:52:27,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780589844] [2020-11-29 22:52:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:52:27,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 22:52:27,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-29 22:52:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:27,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-11-29 22:52:27,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429563349] [2020-11-29 22:52:27,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-29 22:52:27,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-29 22:52:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:52:27,780 INFO L87 Difference]: Start difference. First operand 829 states and 887 transitions. Second operand 29 states. [2020-11-29 22:52:29,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:29,937 INFO L93 Difference]: Finished difference Result 1229 states and 1317 transitions. [2020-11-29 22:52:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:52:29,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 123 [2020-11-29 22:52:29,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:29,942 INFO L225 Difference]: With dead ends: 1229 [2020-11-29 22:52:29,942 INFO L226 Difference]: Without dead ends: 1229 [2020-11-29 22:52:29,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:52:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2020-11-29 22:52:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 899. [2020-11-29 22:52:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-11-29 22:52:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 961 transitions. [2020-11-29 22:52:29,961 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 961 transitions. Word has length 123 [2020-11-29 22:52:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:29,962 INFO L481 AbstractCegarLoop]: Abstraction has 899 states and 961 transitions. [2020-11-29 22:52:29,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-29 22:52:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 961 transitions. [2020-11-29 22:52:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-11-29 22:52:29,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:29,965 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:30,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 22:52:30,184 INFO L429 AbstractCegarLoop]: === Iteration 41 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:52:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash 310016849, now seen corresponding path program 2 times [2020-11-29 22:52:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128551711] [2020-11-29 22:52:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:30,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:52:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 22:52:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128551711] [2020-11-29 22:52:30,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59867439] [2020-11-29 22:52:30,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:52:31,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:52:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:52:31,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 56 conjunts are in the unsatisfiable core [2020-11-29 22:52:31,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:31,025 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 10 treesize of output 8 [2020-11-29 22:52:31,026 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:31,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:31,041 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:31,041 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-11-29 22:52:31,354 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:52:31,354 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:31,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:31,366 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 22:52:31,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-11-29 22:52:31,443 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:52:31,443 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:31,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:31,462 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:52:31,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-11-29 22:52:32,869 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:32,869 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-11-29 22:52:32,871 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-29 22:52:32,891 INFO L625 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2020-11-29 22:52:32,892 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:32,892 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-11-29 22:52:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-29 22:52:32,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:52:32,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2020-11-29 22:52:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418721125] [2020-11-29 22:52:32,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-29 22:52:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:52:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-29 22:52:32,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2020-11-29 22:52:32,976 INFO L87 Difference]: Start difference. First operand 899 states and 961 transitions. Second operand 38 states. [2020-11-29 22:52:34,510 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-11-29 22:52:37,251 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:52:42,157 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:52:45,535 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:52:48,882 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:52:53,562 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:52:57,774 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-11-29 22:52:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:52:57,847 INFO L93 Difference]: Finished difference Result 1088 states and 1158 transitions. [2020-11-29 22:52:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 22:52:57,848 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 129 [2020-11-29 22:52:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:52:57,850 INFO L225 Difference]: With dead ends: 1088 [2020-11-29 22:52:57,851 INFO L226 Difference]: Without dead ends: 575 [2020-11-29 22:52:57,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=190, Invalid=2260, Unknown=0, NotChecked=0, Total=2450 [2020-11-29 22:52:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2020-11-29 22:52:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 572. [2020-11-29 22:52:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-11-29 22:52:57,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 611 transitions. [2020-11-29 22:52:57,862 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 611 transitions. Word has length 129 [2020-11-29 22:52:57,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:52:57,863 INFO L481 AbstractCegarLoop]: Abstraction has 572 states and 611 transitions. [2020-11-29 22:52:57,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-29 22:52:57,863 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 611 transitions. [2020-11-29 22:52:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-11-29 22:52:57,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:52:57,865 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:52:58,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:52:58,088 INFO L429 AbstractCegarLoop]: === Iteration 42 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:52:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:52:58,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1458606198, now seen corresponding path program 13 times [2020-11-29 22:52:58,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:52:58,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964785345] [2020-11-29 22:52:58,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:52:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:59,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:52:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:52:59,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964785345] [2020-11-29 22:52:59,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213606087] [2020-11-29 22:52:59,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:52:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:52:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 77 conjunts are in the unsatisfiable core [2020-11-29 22:52:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:52:59,443 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-29 22:52:59,443 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-11-29 22:52:59,445 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:52:59,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:52:59,458 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:52:59,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:18 [2020-11-29 22:53:00,090 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:53:00,090 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:00,104 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:00,105 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 22:53:00,105 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2020-11-29 22:53:00,222 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:53:00,223 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:00,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:00,240 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:53:00,240 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:41 [2020-11-29 22:53:00,787 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-29 22:53:00,788 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:00,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:00,801 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-29 22:53:00,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:31 [2020-11-29 22:53:03,496 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:03,496 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 70 [2020-11-29 22:53:03,497 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:03,559 INFO L625 ElimStorePlain]: treesize reduction 29, result has 57.4 percent of original size [2020-11-29 22:53:03,563 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:53:03,563 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:53, output treesize:8 [2020-11-29 22:53:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:53:03,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:03,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 58 [2020-11-29 22:53:03,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92031624] [2020-11-29 22:53:03,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-11-29 22:53:03,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:03,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-11-29 22:53:03,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3180, Unknown=0, NotChecked=0, Total=3306 [2020-11-29 22:53:03,811 INFO L87 Difference]: Start difference. First operand 572 states and 611 transitions. Second operand 58 states. [2020-11-29 22:53:10,628 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-11-29 22:53:18,404 WARN L193 SmtUtils]: Spent 6.14 s on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-11-29 22:53:22,710 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-11-29 22:53:23,696 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-11-29 22:53:26,134 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-11-29 22:53:29,680 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-11-29 22:53:38,148 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-29 22:53:39,046 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-11-29 22:53:39,477 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-11-29 22:53:39,852 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-11-29 22:53:40,233 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2020-11-29 22:53:41,760 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-29 22:53:42,599 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-11-29 22:53:43,070 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-29 22:53:43,346 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-11-29 22:53:43,678 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2020-11-29 22:53:44,037 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-11-29 22:53:46,432 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-11-29 22:53:46,864 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-11-29 22:53:47,273 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-11-29 22:53:47,733 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-11-29 22:53:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:50,070 INFO L93 Difference]: Finished difference Result 1399 states and 1485 transitions. [2020-11-29 22:53:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-29 22:53:50,070 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 136 [2020-11-29 22:53:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:50,072 INFO L225 Difference]: With dead ends: 1399 [2020-11-29 22:53:50,073 INFO L226 Difference]: Without dead ends: 579 [2020-11-29 22:53:50,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=647, Invalid=10481, Unknown=2, NotChecked=0, Total=11130 [2020-11-29 22:53:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2020-11-29 22:53:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 576. [2020-11-29 22:53:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 576 states. [2020-11-29 22:53:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 615 transitions. [2020-11-29 22:53:50,084 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 615 transitions. Word has length 136 [2020-11-29 22:53:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:50,084 INFO L481 AbstractCegarLoop]: Abstraction has 576 states and 615 transitions. [2020-11-29 22:53:50,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-11-29 22:53:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 615 transitions. [2020-11-29 22:53:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-11-29 22:53:50,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:50,087 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:50,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-29 22:53:50,312 INFO L429 AbstractCegarLoop]: === Iteration 43 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:53:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -480201069, now seen corresponding path program 14 times [2020-11-29 22:53:50,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:50,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429233491] [2020-11-29 22:53:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:50,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:53:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:53:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429233491] [2020-11-29 22:53:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052934826] [2020-11-29 22:53:50,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:53:51,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:53:51,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 50 conjunts are in the unsatisfiable core [2020-11-29 22:53:51,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 66 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:53:51,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:53:51,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2020-11-29 22:53:51,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076489273] [2020-11-29 22:53:51,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-29 22:53:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:53:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-29 22:53:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:53:51,528 INFO L87 Difference]: Start difference. First operand 576 states and 615 transitions. Second operand 33 states. [2020-11-29 22:53:53,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:53:53,532 INFO L93 Difference]: Finished difference Result 704 states and 751 transitions. [2020-11-29 22:53:53,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 22:53:53,534 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 140 [2020-11-29 22:53:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:53:53,537 INFO L225 Difference]: With dead ends: 704 [2020-11-29 22:53:53,537 INFO L226 Difference]: Without dead ends: 704 [2020-11-29 22:53:53,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2020-11-29 22:53:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-11-29 22:53:53,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 646. [2020-11-29 22:53:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2020-11-29 22:53:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 689 transitions. [2020-11-29 22:53:53,550 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 689 transitions. Word has length 140 [2020-11-29 22:53:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:53:53,550 INFO L481 AbstractCegarLoop]: Abstraction has 646 states and 689 transitions. [2020-11-29 22:53:53,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-29 22:53:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 689 transitions. [2020-11-29 22:53:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-11-29 22:53:53,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:53:53,553 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:53:53,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:53:53,768 INFO L429 AbstractCegarLoop]: === Iteration 44 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:53:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:53:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1273095672, now seen corresponding path program 15 times [2020-11-29 22:53:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:53:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647608702] [2020-11-29 22:53:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:53:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:55,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:53:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:53:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:53:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647608702] [2020-11-29 22:53:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545624239] [2020-11-29 22:53:55,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:53:55,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 22:53:55,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:53:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 90 conjunts are in the unsatisfiable core [2020-11-29 22:53:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:53:55,795 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:55,796 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-29 22:53:55,796 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:55,828 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-29 22:53:55,828 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:53:55,828 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:21 [2020-11-29 22:53:57,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:53:57,138 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:53:57,139 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-29 22:53:57,139 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:57,154 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:57,154 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2020-11-29 22:53:57,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:53:57,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-11-29 22:53:57,156 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:53:57,208 INFO L625 ElimStorePlain]: treesize reduction 40, result has 45.9 percent of original size [2020-11-29 22:53:57,238 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-11-29 22:53:57,238 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:57,265 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:57,266 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:53:57,266 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:84, output treesize:30 [2020-11-29 22:53:57,394 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-11-29 22:53:57,395 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:53:57,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:53:57,417 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-11-29 22:53:57,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:40 [2020-11-29 22:54:06,761 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-29 22:54:06,792 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:54:06,792 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 47 [2020-11-29 22:54:06,792 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:54:06,877 INFO L625 ElimStorePlain]: treesize reduction 6, result has 89.5 percent of original size [2020-11-29 22:54:06,881 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:54:06,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:62, output treesize:8 [2020-11-29 22:54:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:54:07,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:54:07,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2020-11-29 22:54:07,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536181787] [2020-11-29 22:54:07,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-29 22:54:07,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:54:07,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-29 22:54:07,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4011, Unknown=3, NotChecked=0, Total=4160 [2020-11-29 22:54:07,223 INFO L87 Difference]: Start difference. First operand 646 states and 689 transitions. Second operand 65 states. [2020-11-29 22:54:20,582 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 58 [2020-11-29 22:54:23,627 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 51 [2020-11-29 22:54:28,910 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-11-29 22:54:39,435 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 65 [2020-11-29 22:54:45,830 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-11-29 22:54:53,161 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 47 [2020-11-29 22:54:54,240 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-11-29 22:54:58,414 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 61 [2020-11-29 22:55:02,750 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-11-29 22:55:09,038 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-11-29 22:55:13,538 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-29 22:55:17,215 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-11-29 22:55:23,289 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-29 22:55:43,014 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 59 [2020-11-29 22:55:51,189 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 57 [2020-11-29 22:55:55,467 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-29 22:55:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:59,981 INFO L93 Difference]: Finished difference Result 1603 states and 1699 transitions. [2020-11-29 22:55:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-29 22:55:59,982 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 153 [2020-11-29 22:55:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:55:59,987 INFO L225 Difference]: With dead ends: 1603 [2020-11-29 22:55:59,987 INFO L226 Difference]: Without dead ends: 1364 [2020-11-29 22:55:59,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 91.2s TimeCoverageRelationStatistics Valid=630, Invalid=14609, Unknown=13, NotChecked=0, Total=15252 [2020-11-29 22:55:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2020-11-29 22:56:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1337. [2020-11-29 22:56:00,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1337 states. [2020-11-29 22:56:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1427 transitions. [2020-11-29 22:56:00,010 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1427 transitions. Word has length 153 [2020-11-29 22:56:00,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:56:00,011 INFO L481 AbstractCegarLoop]: Abstraction has 1337 states and 1427 transitions. [2020-11-29 22:56:00,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-29 22:56:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1427 transitions. [2020-11-29 22:56:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-29 22:56:00,014 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:56:00,014 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:56:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-29 22:56:00,230 INFO L429 AbstractCegarLoop]: === Iteration 45 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, cstrspnErr1REQUIRES_VIOLATION, cstrspnErr6REQUIRES_VIOLATION, cstrspnErr7REQUIRES_VIOLATION, cstrspnErr5REQUIRES_VIOLATION, cstrspnErr0REQUIRES_VIOLATION, cstrspnErr9REQUIRES_VIOLATION, cstrspnErr4REQUIRES_VIOLATION, cstrspnErr2REQUIRES_VIOLATION, cstrspnErr3REQUIRES_VIOLATION, cstrspnErr8REQUIRES_VIOLATION]=== [2020-11-29 22:56:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2117774965, now seen corresponding path program 16 times [2020-11-29 22:56:00,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518033315] [2020-11-29 22:56:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-29 22:56:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 426 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:56:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518033315] [2020-11-29 22:56:01,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915331767] [2020-11-29 22:56:01,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/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 22:56:01,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:56:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:01,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,245 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_42|]} [2020-11-29 22:56:01,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:56:01,253 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-29 22:56:01,253 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:56:01,269 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 10 treesize of output 8 [2020-11-29 22:56:01,270 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:56:01,280 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,280 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:21, output treesize:18 [2020-11-29 22:56:01,338 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-11-29 22:56:01,338 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:56:01,347 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,347 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-11-29 22:56:01,404 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2020-11-29 22:56:01,404 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:56:01,418 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:56:01,418 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-29 22:56:01,419 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:28 [2020-11-29 22:56:05,267 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-29 22:56:05,458 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:56:05,458 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 74 [2020-11-29 22:56:05,459 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:56:05,561 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-11-29 22:56:05,562 INFO L625 ElimStorePlain]: treesize reduction 6, result has 92.1 percent of original size [2020-11-29 22:56:05,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:56:05,577 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:56:05,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:27 [2020-11-29 22:56:05,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:56:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 350 proven. 22 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-29 22:56:05,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:05,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2020-11-29 22:56:05,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790575697] [2020-11-29 22:56:05,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-29 22:56:05,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:05,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-29 22:56:05,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 22:56:05,863 INFO L87 Difference]: Start difference. First operand 1337 states and 1427 transitions. Second operand 43 states. [2020-11-29 22:56:08,090 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-11-29 22:56:08,846 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-29 22:56:09,075 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-11-29 22:56:09,786 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-11-29 22:56:10,146 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-29 22:56:10,682 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-11-29 22:56:11,725 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-29 22:56:12,253 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-11-29 22:56:12,900 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-11-29 22:56:13,511 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-29 22:56:13,965 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-29 22:56:14,319 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-11-29 22:56:14,608 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-11-29 22:56:14,892 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-11-29 22:56:15,162 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-11-29 22:56:15,443 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-29 22:56:19,965 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-11-29 22:56:20,248 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-29 22:56:20,587 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-11-29 22:56:20,905 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-11-29 22:56:21,314 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-29 22:56:21,724 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-29 22:56:22,589 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-11-29 22:56:23,065 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-29 22:56:23,501 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-11-29 22:56:23,742 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-11-29 22:56:24,485 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-11-29 22:56:24,756 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-11-29 22:56:25,664 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-11-29 22:56:25,974 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-11-29 22:56:26,180 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-29 22:56:30,943 WARN L193 SmtUtils]: Spent 4.64 s on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-11-29 22:56:31,247 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-11-29 22:56:32,088 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-11-29 22:56:32,465 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-11-29 22:56:32,743 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-11-29 22:56:33,186 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-11-29 22:56:34,369 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-11-29 22:56:34,732 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-11-29 22:56:35,194 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-11-29 22:56:35,500 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-29 22:56:35,761 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-29 22:56:35,997 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-29 22:56:36,406 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-11-29 22:56:41,579 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-11-29 22:56:41,930 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-11-29 22:56:42,372 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-11-29 22:56:43,490 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-11-29 22:56:43,900 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-11-29 22:56:44,375 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-11-29 22:56:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:44,377 INFO L93 Difference]: Finished difference Result 1483 states and 1577 transitions. [2020-11-29 22:56:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-11-29 22:56:44,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-11-29 22:56:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:56:44,382 INFO L225 Difference]: With dead ends: 1483 [2020-11-29 22:56:44,382 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:56:44,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=1970, Invalid=10686, Unknown=0, NotChecked=0, Total=12656 [2020-11-29 22:56:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:56:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:56:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:56:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:56:44,383 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 157 [2020-11-29 22:56:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:56:44,383 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:56:44,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-29 22:56:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:56:44,384 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:56:44,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 22:56:44,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:56:44 BoogieIcfgContainer [2020-11-29 22:56:44,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:56:44,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:56:44,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:56:44,589 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:56:44,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:28" (3/4) ... [2020-11-29 22:56:44,592 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:56:44,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-11-29 22:56:44,597 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrspn [2020-11-29 22:56:44,598 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-11-29 22:56:44,603 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-29 22:56:44,604 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 22:56:44,604 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:56:44,605 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:56:44,662 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_83ab8d5f-126a-439c-9247-9950ffa9699f/bin/uautomizer/witness.graphml [2020-11-29 22:56:44,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:56:44,663 INFO L168 Benchmark]: Toolchain (without parser) took 617519.82 ms. Allocated memory was 92.3 MB in the beginning and 234.9 MB in the end (delta: 142.6 MB). Free memory was 59.0 MB in the beginning and 99.6 MB in the end (delta: -40.6 MB). Peak memory consumption was 101.7 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,663 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 92.3 MB. Free memory was 52.0 MB in the beginning and 51.9 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:44,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 466.25 ms. Allocated memory is still 92.3 MB. Free memory was 58.8 MB in the beginning and 57.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,663 INFO L168 Benchmark]: Boogie Preprocessor took 55.49 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 54.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,664 INFO L168 Benchmark]: RCFGBuilder took 1041.12 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 66.5 MB in the end (delta: -11.8 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,664 INFO L168 Benchmark]: TraceAbstraction took 615876.46 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 65.8 MB in the beginning and 103.5 MB in the end (delta: -37.6 MB). Peak memory consumption was 87.0 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,664 INFO L168 Benchmark]: Witness Printer took 73.54 ms. Allocated memory is still 234.9 MB. Free memory was 103.5 MB in the beginning and 99.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:44,666 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 92.3 MB. Free memory was 52.0 MB in the beginning and 51.9 MB in the end (delta: 39.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 466.25 ms. Allocated memory is still 92.3 MB. Free memory was 58.8 MB in the beginning and 57.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.49 ms. Allocated memory is still 92.3 MB. Free memory was 57.2 MB in the beginning and 54.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1041.12 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 66.5 MB in the end (delta: -11.8 MB). Peak memory consumption was 29.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 615876.46 ms. Allocated memory was 111.1 MB in the beginning and 234.9 MB in the end (delta: 123.7 MB). Free memory was 65.8 MB in the beginning and 103.5 MB in the end (delta: -37.6 MB). Peak memory consumption was 87.0 MB. Max. memory is 16.1 GB. * Witness Printer took 73.54 ms. Allocated memory is still 234.9 MB. Free memory was 103.5 MB in the beginning and 99.6 MB in the end (delta: 3.9 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: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 552]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 77 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 615.7s, OverallIterations: 45, TraceHistogramMax: 8, AutomataDifference: 523.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2038 SDtfs, 8413 SDslu, 7783 SDs, 0 SdLazy, 55771 SolverSat, 1117 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 104.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3352 GetRequests, 1827 SyntacticMatches, 14 SemanticMatches, 1511 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17801 ImplicationChecksByTransitivity, 467.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1337occurred in iteration=44, 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, 45 MinimizatonAttempts, 1940 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 79.4s InterpolantComputationTime, 4591 NumberOfCodeBlocks, 4547 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 4520 ConstructedInterpolants, 805 QuantifiedInterpolants, 7178716 SizeOfPredicates, 354 NumberOfNonLiveVariables, 8068 ConjunctsInSsa, 1139 ConjunctsInUnsatCore, 71 InterpolantComputations, 19 PerfectInterpolantSequences, 1458/7041 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...